CA1115367A - Self-stripping electrical terminal - Google Patents
Self-stripping electrical terminalInfo
- Publication number
- CA1115367A CA1115367A CA321,776A CA321776A CA1115367A CA 1115367 A CA1115367 A CA 1115367A CA 321776 A CA321776 A CA 321776A CA 1115367 A CA1115367 A CA 1115367A
- Authority
- CA
- Canada
- Prior art keywords
- slot
- opening
- branches
- wire
- bore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
- H01R4/245—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the additional means having two or more slotted flat portions
- H01R4/2454—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the additional means having two or more slotted flat portions forming a U-shape with slotted branches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
- H01R4/2425—Flat plates, e.g. multi-layered flat plates
- H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base
- H01R4/2433—Flat plates, e.g. multi-layered flat plates mounted in an insulating base one part of the base being movable to push the cable into the slot
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49174—Assembling terminal to elongated conductor
- Y10T29/49181—Assembling terminal to elongated conductor by deforming
- Y10T29/49185—Assembling terminal to elongated conductor by deforming of terminal
- Y10T29/49188—Assembling terminal to elongated conductor by deforming of terminal with penetrating portion
- Y10T29/4919—Through insulation
Abstract
ABSTRACT
The present invention relates to the connection of in-sulated electric wires, and it pertains more precisely to a terminal and a connection block for electrically connecting two insulated wires without prestripping them. Prior art connecting devices that operate without prestripping are usually in the form of a flat spring, cut in a U shaped the branches of which define a slot. In such devices, the insulated wire to be connected is introduced at the end of the slot adjacent the free ends of the branches. This type of device has a disadvantage since the perforation of the insula-tion is made where the deformation of the branches is the easiest.
The self-stripping connecting device of the present invention is constituted by a flat spring including a portion forming a U, the branches of which are elastically biased one against the other, and an opening to allow the introduction of the insulated wire at the end of the slot adjacent the base of the U. Additionally a connecting block is disclosed which comprises an insulating box having at least one bore for receiving an insulated wire, and a movable element having a connecting device and being movable from a first position in which an inserting opening of the connect-ing device is in line with the bore, toward a second position in which the end of the slot remote from the opening is in line with the bore.
The present invention relates to the connection of in-sulated electric wires, and it pertains more precisely to a terminal and a connection block for electrically connecting two insulated wires without prestripping them. Prior art connecting devices that operate without prestripping are usually in the form of a flat spring, cut in a U shaped the branches of which define a slot. In such devices, the insulated wire to be connected is introduced at the end of the slot adjacent the free ends of the branches. This type of device has a disadvantage since the perforation of the insula-tion is made where the deformation of the branches is the easiest.
The self-stripping connecting device of the present invention is constituted by a flat spring including a portion forming a U, the branches of which are elastically biased one against the other, and an opening to allow the introduction of the insulated wire at the end of the slot adjacent the base of the U. Additionally a connecting block is disclosed which comprises an insulating box having at least one bore for receiving an insulated wire, and a movable element having a connecting device and being movable from a first position in which an inserting opening of the connect-ing device is in line with the bore, toward a second position in which the end of the slot remote from the opening is in line with the bore.
Description
~ ~1.53~i7 5E :F~aPPING ~PaCAL ~:NAL .
TECHNICAL FIELD
m e present lnventlon relates to the connectlon of lnsulated electric wires, and it pretalns more preclsely to a termdnal device and a connection block ~or electrically connec~ing two lnsulated wlres without strlpplng them.
CKGF0UND OF PRIOR ART ~ ~
Connecting device~ that operate wlthout prestrlpping are known ln the prior art in the fo~m of a connecting device constl-tuted Or a flat sprlng, cut in a U or fork shape, the branches of which are elastical~y bl~ed one agalnst the other and provlded wlth sharp edges and which define a 810t into whlch 1~ lntroduced the lnsulated wire whlch 18 to be connected, as lndlcated ln the.
descrlptlon o~ the German Util~ty Design No. 70 30 836.
In thls device, the lnsulated wire to be conneated 1B in~
troduced at the end of the slot adJacent the free ends of the branches o~ the connectlng device where the ~sulated sheath 18 per-rorated. qhe wire 18 then forced toward the other d of the slot where lt 18 tl~htly held by the resllient bran~hes.
qhis type Or ccnnecting device has a disadvantage lnherent to its own structure, s~nce the perroratlon Or the insulatlon 18 made at the end Or the branches, whlch 18 the portlon where the deformatlcn Or the branches is the easlest, thereby requlring a strong restoring rorce in order that the cut ln the in~ulating sheath can be effectlvely reallzed. Besldes, the tlghtening of the c~re Or the elect~ic wlre, after having been bared, ls effected nearer to the common portion Or the brEnches o~ the connecting or03n, l.e. at a spot where the deformabllity Or the branches 18 the small-est and where, consequently, these branches can damage the core o~
.. ..
-, L
. . ' ;
- : ' - -.
3~
the wlre lf the restoring force of the branches is too strong, or can form a poor electrical, mech~ical, and thermal contact in the opposlte ca~e.
In order to improve the qualitles of the elasticity Or the branches at the polnt of contact with the core of the wire to be connected, it is necessary to increase the total length of the branches and to provide at the proximity of their bases a wider recess than that of the slot for cutting the in3ulating material and the squeezlng of the core of the conducting wire.
In order to facllitate the placement of lnsulated wire in this type of connecting device, the connecting blocks have been impro~ed as descr~bed in the U.S. Patent l~o. 3,936,128. In thiæ
connector, the ccnnectlng devlce of the above described type is nounted in the cover of a box, while the box ccmprises two parallel bores deætined to receive the wire~ which are to be connected.
~he connectlcn of the wires is obtained by introducing them into the respective bores of the box and placing the cover on the box.
Ey introducing the wires into the connecting device through the portion of the slot formed ~ the free end of ~he branches, mean~ must be provided in the ~o ~or assuring a precise guiding of the wire~ and to correctly position their aY.es relative to the slot.
Such conneclor blocks present barriers to ninlaturizatlon, and the connectors require the use of different connecting dev~ces acconding to the diameter of the wires to be connected, which natu-rally llmits the flexibility of u~ing this device and prohibltæ theuse of a standard connecting device for two wires of a different diameter. Besides, if the wires to be connected comprlse a core formed of multiple strands, a certain number of these strands can-not be correctly urged into the slot between the free ends of the 3 branches of the connecting device, and the strands obstruct the engagement of the cover and do not make proper electrical contact.
~RIEF SUMMARY OF INVENTION
An ob~ect of the present inventlon ls to provide a termi-nal device whlch does not require prestripping of insulated wires, and which overcomes the shortcoming~ of prior art devices with re-spect to the cutting of the insulatlon and the squeezing of the core of the wire.
Another obJect of the present invention is to prcvlde a ~- self-stripplng connecting devlce ~or use with insulated wires of a - ~ :
. . ' '' ' ' ' ~ , ' ' ~ , .
.. -, .S3fi7 diameter wlthin a relatively extended range.
Another obJect of the present invention ls to provide a self-stripping connecting block which allows progressive miniaturlæa-tion and easy lnstallation.
Another obJect of the present invention i5 to provide a standard self-stripping connectlng block permlttlng the connection of two electric wires of greatly different dian~ters.
Still another ob~ect of the present invention is to provide a new process of connecting electrlc wires wlth~ut prestripping, by means of a connector block.
~ hese and stlll other ob~ects which will be apparen~ from the following description are realized according to the present in-~entlon by providlng a self-stripping connectlng device constitu~ed of a flat spring comprising a portion formlng a U, the branches of which are elastlcally biased one ag~inst the other for cutting the lnsulating material and for as~urlng a reliable clamping of the core of the insulated wlre lntroduced into the slot delimited by the branches. Ihe device also includes a portion for connectlon wlth an elRment of an electric circuit and an opening to allow the introduction Or the lnsulated wire at the end of the slot ad~acent the base of the U.
According to the present invention, it is also foreseen to provide a connecting block comprising an insulating box dellmit-ing an inner chamber and having one of lts faces pierced by at least one bore for receiving an insulated wire to be connected and a mobile element forming a push button ad pted for engagement with the box. The moblle element has a connecting device placed parallel wlth the ~ace of the box and ls movable in a direction parallel with the general direction of the branches of the connecting devlce from a first poæltion in which an inserting opening of the connect-ing device is in llne with the bore, toward a second positiQn in which the end of the 910t remote from the opening ls placed in line with the bore.
The present invention alæo provides for a method of con-nectlng wires without prestripplng the wires, by meanæ of a con-necting block conætituted by an insulating box del~miting an inr.er chamber and belng pierced by at least one bore for receiving an inæulated wire, and a mobile element forming a push-button adapted ~- for engagement with the box and having a connecting device aæ de-, scribed above.
The method comprises the following steps: intro-ducing an insulated wire into each bore of the box; and moving the pushbuttons in the box to bring the wire between the ends of the branches of the connecting device distant from their common portion, ?
The invention is particularly directed toward a self-stripping electrical terminal for making electrical connection with at least one insulated electric wire, The terminal com-prises a strip of resilient metal having at least one U-shaped portion formed of a base portion and two branches extending ;
therefrom, the branches defining an open-ended slot therebetween, ; The U-shaped portion includes an opening between the branches adjacent the base portion, The opening is wider than the slot and is of a predetermined size sufficient to receive an insulated wire, inserted thereinto in a direction generally transversely of the plane of the U-shaped portion, The slot is sized to resiliently engage the conductor of the insulated wire, and is tapered such that the width of the slot decreases with distance ~rom the base portion, The invention is also directed toward a process for establishing an electrical connection between a terminal and an insulated wire having a central conductor and an outer insu-lating sheath, The process comprises the steps o~: forming the terminal in a generally U-shaped configuration with two resilient branches defining an open-ended wire receiving slot, the branches being biased together such that the slot is narrower than the conductor; forming an opening spaced from the open end of the slot and communicating with the slot and being wider than the slot for receiving the insulated wire;
inserting the insulated wire into the opening; and moving the insulated wire outwardly from the opening into the open-ended ~ 4-.
.
.
11153fi~
slot so that the branches pierce the insulating sheath and en-gage the conductor of the wire.
BRIEF DESCRIPTION OF DRAWINGS
The present invention will be better understood from the following description made with reference to the attached drawings in which:
Figure 1 is a front view of a connecting device of the prior art;
Figure 2 is a front view of a double connecting device according to the present invention;
Figure 3 is a perspective exploded view of a connecting block according to the present invention;
Figure 4 is a sectional view of a connecting block according to the present invention before the introduction of the wire;
Figure 5 is a sectional view o~ the connecting block of Figure 4 after insertion of the wire which is to be connected;
Figure 6 represents a sectional view along the direction 6-6 of the connection block of Figure 4;
Figure 7 is a similar view to the one in Figure 4 and shows a connecting block provided with two connecting devices according to the present invention;
Figure 8 is a perspective view of a connecting device according to another embodiment of the present invention; and Figure 9 is a sectional view of a connecting block comprising a connecting device of the type shown in Figure 8.
DETAILED DESCRIPTION OF INVENTION
~ . . . :
Figure 1 represents in elevation a connecting device of the prior art the general shape of which is that of a fork or that of a U, formed of two branches 1 and 2 extending in -parallel directions and delimiting a slot 3 destined for receiving the insulated wire which has to be connected. The .
~-4a-;'''-' ' : , chamferings 4 are provided on the ~ree end o~ the branches of the connecting device for enhancing tbe engagement of the insulated wire to be connected by movement in the direction indicated by the arrow 5. The chamferings 4 and the ends of the branches delimiting the slot 3 are generally provided '~
-4b-;3t~7 with sharp edges, while a recess 6 at the base of the slot 3 has relatively thick, flat edges in view of improving the elasticity of the branches 1 and 2.
Figure 2 represents in elevatlon a terminal device accord-lng to the present invention destined for connecting two insulatedwlres.
Ihis connecting device is cut frGm a conductive metallic plate and comprises an elementary connecting device, ~enerally designated by 12. The elenentary connecting device 12 includes a p~r of branches 14, 15 which define a slot 16 therebetween. A
hole 17 of a larger width than that of the slot 16 prolongs the end Or the slot 16 at the side Or the portion 18 of the spring connect-lng each pair Or branches. me hole 17 constitutes an opening to allow insertlon of the insulated wire 19. This insulated wire 19 i8 subsequently forced into the slot 16, as indicated by the arrow 20. The width of the end of the slot 16 contiguous wlth the open-ing 17 is determined so as to cut the insulating ma~erial of the in-sulated wire 19 wlthout damaging the core of this wire. Ihe in-sulated wire, bared ln this manner, is then brou~ht tcward the other end of the slot 16, the point at which the elasticity of the branches 14 and 15 ls the best. This assures a good resistance to damage fro~ mechanical and thermal shocks to the connectlon.
The width of the slot 16 preferably decreases in the directlon Or movement Or the insulated wire.
me connecting device also includes a portlon generally deslgnated 11 for connection to the element of the electric clrcult to which the lnsulated wire 19 must be connected. In the embodiment shown in Figure 2, this portlon 11 is constltuted by a second elemen- -tary connecting device according to the present invention, ldentlcal to the above-described devlce and attached thereto by the zone 13.
The enga~ement of a second insulated wire 21 by the second elementary connecting device permits the electrical connectlon of the wires 19 and 21 without prestripping either Or the wires.
When the device is used to connect multiple ~trand ln-sulated wires9 it will be easily understood that the engagement ofthls wire by means Or the insertlon orifice guarantees that all Or the strands will be effectlvely engaged in the slot 16.
Figure 3 shows an exploded perspective vlew of a connect-ing block according to the present lnventlon, which includes a con~
:
111~3ti7 .
nectlng device of the type represented in Figure 2. Such a connect-ing block for two insulated electric wires ls constituted of two portions of insulating material: a box 25~ and a mobile element, generally deslgnated by 26. Both portions may be realized~ for example, by a transparent plastic material.
Ihe box 25 of substantially parallelepiped shaped defines an lnner cha~ber 70 for the receptlon of a mobile element 26 through the opening 71 in the face 72 of the box. Ihe face 73 of the box includes two parallel bores 27 and 28, extending perpendicu-larly to the direction of displacement of the mobile element 26 and opening into the inner chamber 70.
The mobile element 26 carries the double connectlng device 29, placed so that the general direction of the branches of this device are parallel with the direction of displacement of the mobile element 26 in the box 25. The connectlng device 29 is held centered in the mobile element 26 by means of protrusions 30 in the cover 31, which flt between the ends of the paired branches of the connecting device, as indicated in Figure 6. A shoulder 32 of the cover holds the connecting device perpendicular to the bores 27, 28 of the box 25, and side faces 22 and 74 of the moblle ele-ment 26 guide the element 26 in the box 25.
Parallel grooves 79 and 78 are provided in the side face 74 of the mobile element for cooperatlon with a rib 76 on the box 25 for assuring a correct positioning of the mobile element in the 25 box, as will be explained in connection with Figures 4 and 5.
Figure 4 shows the connect~ng block according to the present inventlon ln the open position to allow introduction of the insulated wires, such as the wire 19. ~he box 25 includes a shoulder 35 whlch extends into the inner cham~er 70 from the wall 75 of the box opposite the face 72 provided with the opening of the box. m e sur-face 36 of the shoulder 35 guides the connecting device 29, and the end 27 is even with the edges of the bores 27 and 28 and serves to support the inner end of the wire.
In the open positlon represented ln Figure 4, the mobile 35 element 26 ls placed so that the openings 17 of connecting device 29 are in line with the corresponding bores of the box 25. ~his posltloning is releasably maintalned by the cooperation of a semicy-lindrical rib 76 on the lnner surface of the box and a groove 79 in ~' the face 74 of the ncbile element 26.
.... .
lil53~i7 Ihe insulated wire 1~ is lnserted into the bore 27 as indicated by the arrow 803 through the openlng 17 of the connectlng device 29 and, preferably3 its end is brought into engagement with the wall 74 of the mobile element 26.
Subsequently, the mobile element 26 ls forced into the box 25, as indicated ln Figure 5, so as to bring the free ends 81 of the branches of the connecting device 29 into alignment with the bores 27 and 28. me insulated wires are supported simultaneously by the walls of bores 27 and 28 and the end 37 of the shoulder 35. lhe movement o~ the mobile element causes the wlres to be engaged by slot 16 of the connecting de~ice where their insulating sheath is severed and in which they are squeezed by the free ends of the branches of the connecting organ.
It will be understood that the shape of the protrusions 30 Of the cover 31 and of the spaces 33 of the supporting lugs 40 of the connecting device (Figure 6) are determined so as not to limit the elastic restoring force of the ends of the branches of the connecting devlce when the wire is introduced into the device.
In the connected position, the ends 81 of the branches of the connecting organ open (separated from each other) under the ac-tlon of the insulated wire engaged in the slot 16, and the connect-ing device is thus disengaged from cover 31.
The dimensions of the lateral faces 22 and 74 are prefer ably chosen so that the end 82 engages the inner surface o~ the wall 75 of the box in the connected position.
The m~lnt~ining of the m.obile ele~ent 26 in this position is assured by the engagement of the groove 78 of the mobile element with the rib 76 of the box, and the confining action of the shoulders 85 of the box.
Flgure 6 ls a sectional view along the line 6-6 of Figure 4 which shows the protrusions 30 of the cover 31 and the lugs 40 defining the space 33 for accommcdatlng the protrusions 30.
qhe connecting block of the present invention, due to the use of a connectlng device of the type described in connection with Figure 2, permits the connection of insulated wlres of a relatively extended diameter range~ for example between 0.4 and 0.8 mm. It is therefore posslble to connect wires of dlfferent diameters withln such range by means of a standard connector block.
In order to further improve this flexibility of utiliza-.
11153~7 .~tion9 it has been foreseen to provide ln the same connector block a second connecting device shifted backward relative to the directlon of wire insertion into the bores, the spacing of the branches Or whichg before the introduction of the insulated wires into the slots 16, is smaller than that of the first connecting organ. This second device is electrically connected to the first connectlng devlce. Thus, a wire of a large diameter is connected by means of the first connecting organ which is placed near to the oriflce o~
the bores. While the second connecting organ may damage or even cut the core of the cable9 this does not affect the connection, since the connection is realized by the first connecting device.
Similarly, an insulated wire of a small dlameter is not connected by the first (larger) connecting device since the spacing of the - -branches is too large9 but it is correctly connected by the second connecting device. Figure 7 shows a section through a connecting block similar to that represented in Flgure 4 in which a second smaller connecting device 50 has simply been Joined to the back of the first device 29.
Figure 8 shcws in perspective a connecting device 57 formed of a single sheet of metal and comprising first and second double connecting devices, 51 and 52 respectively. Ihe spacing of the palrs OI' branches of the device 51 is smaller than that of the pairs of branches of device 52. The opening 58 forms a guide in the central part of the connecting device 57.
Figure 9 shows a connecting block similar to that shown in Figures 4 and 6/ but incorporating the connecting device of Flgure 8. Ihe box of insulated material 53 includes bores, such as 54, and is adapted for receiving a mobile element generally designated as 60. me mobile element 60 is formed of a cover 55 which carries the connecting devlce 57 and is guided by the cooperation of the guiding hole 58 of the device and the guiding finger 59 of the boY.
Ihe connecting device 57 is placed so that the larger slots of the side 52 are closer to the bores 54. The operation of this connecting block is identical with the block represented in Figure 7.
As a further modificatlon, the connectlng devices accord-lng to the present invention can be provided with sharp edges on the sides of the branches defining the slot 169 but this arrangenent is not necessary ~or connecting wires of small diameters.
lllS367 Additionally, it will be understood that the connecting blocks accordin~ to the present invention can be easily adapted for connecting more than two wires by providing a connecting device which includes sufficient coupled pairs of branches and a corre-sponding number of bores in the box.
Thus, the present lnvention is not limited to the examp~eR
described herein, but ls to be llmited only by the appended claim~.
..
:
': '
TECHNICAL FIELD
m e present lnventlon relates to the connectlon of lnsulated electric wires, and it pretalns more preclsely to a termdnal device and a connection block ~or electrically connec~ing two lnsulated wlres without strlpplng them.
CKGF0UND OF PRIOR ART ~ ~
Connecting device~ that operate wlthout prestrlpping are known ln the prior art in the fo~m of a connecting device constl-tuted Or a flat sprlng, cut in a U or fork shape, the branches of which are elastical~y bl~ed one agalnst the other and provlded wlth sharp edges and which define a 810t into whlch 1~ lntroduced the lnsulated wire whlch 18 to be connected, as lndlcated ln the.
descrlptlon o~ the German Util~ty Design No. 70 30 836.
In thls device, the lnsulated wire to be conneated 1B in~
troduced at the end of the slot adJacent the free ends of the branches o~ the connectlng device where the ~sulated sheath 18 per-rorated. qhe wire 18 then forced toward the other d of the slot where lt 18 tl~htly held by the resllient bran~hes.
qhis type Or ccnnecting device has a disadvantage lnherent to its own structure, s~nce the perroratlon Or the insulatlon 18 made at the end Or the branches, whlch 18 the portlon where the deformatlcn Or the branches is the easlest, thereby requlring a strong restoring rorce in order that the cut ln the in~ulating sheath can be effectlvely reallzed. Besldes, the tlghtening of the c~re Or the elect~ic wlre, after having been bared, ls effected nearer to the common portion Or the brEnches o~ the connecting or03n, l.e. at a spot where the deformabllity Or the branches 18 the small-est and where, consequently, these branches can damage the core o~
.. ..
-, L
. . ' ;
- : ' - -.
3~
the wlre lf the restoring force of the branches is too strong, or can form a poor electrical, mech~ical, and thermal contact in the opposlte ca~e.
In order to improve the qualitles of the elasticity Or the branches at the polnt of contact with the core of the wire to be connected, it is necessary to increase the total length of the branches and to provide at the proximity of their bases a wider recess than that of the slot for cutting the in3ulating material and the squeezlng of the core of the conducting wire.
In order to facllitate the placement of lnsulated wire in this type of connecting device, the connecting blocks have been impro~ed as descr~bed in the U.S. Patent l~o. 3,936,128. In thiæ
connector, the ccnnectlng devlce of the above described type is nounted in the cover of a box, while the box ccmprises two parallel bores deætined to receive the wire~ which are to be connected.
~he connectlcn of the wires is obtained by introducing them into the respective bores of the box and placing the cover on the box.
Ey introducing the wires into the connecting device through the portion of the slot formed ~ the free end of ~he branches, mean~ must be provided in the ~o ~or assuring a precise guiding of the wire~ and to correctly position their aY.es relative to the slot.
Such conneclor blocks present barriers to ninlaturizatlon, and the connectors require the use of different connecting dev~ces acconding to the diameter of the wires to be connected, which natu-rally llmits the flexibility of u~ing this device and prohibltæ theuse of a standard connecting device for two wires of a different diameter. Besides, if the wires to be connected comprlse a core formed of multiple strands, a certain number of these strands can-not be correctly urged into the slot between the free ends of the 3 branches of the connecting device, and the strands obstruct the engagement of the cover and do not make proper electrical contact.
~RIEF SUMMARY OF INVENTION
An ob~ect of the present inventlon ls to provide a termi-nal device whlch does not require prestripping of insulated wires, and which overcomes the shortcoming~ of prior art devices with re-spect to the cutting of the insulatlon and the squeezing of the core of the wire.
Another obJect of the present invention is to prcvlde a ~- self-stripplng connecting devlce ~or use with insulated wires of a - ~ :
. . ' '' ' ' ' ~ , ' ' ~ , .
.. -, .S3fi7 diameter wlthin a relatively extended range.
Another obJect of the present invention ls to provide a self-stripping connecting block which allows progressive miniaturlæa-tion and easy lnstallation.
Another obJect of the present invention i5 to provide a standard self-stripping connectlng block permlttlng the connection of two electric wires of greatly different dian~ters.
Still another ob~ect of the present invention is to provide a new process of connecting electrlc wires wlth~ut prestripping, by means of a connector block.
~ hese and stlll other ob~ects which will be apparen~ from the following description are realized according to the present in-~entlon by providlng a self-stripping connectlng device constitu~ed of a flat spring comprising a portion formlng a U, the branches of which are elastlcally biased one ag~inst the other for cutting the lnsulating material and for as~urlng a reliable clamping of the core of the insulated wlre lntroduced into the slot delimited by the branches. Ihe device also includes a portion for connectlon wlth an elRment of an electric circuit and an opening to allow the introduction Or the lnsulated wire at the end of the slot ad~acent the base of the U.
According to the present invention, it is also foreseen to provide a connecting block comprising an insulating box dellmit-ing an inner chamber and having one of lts faces pierced by at least one bore for receiving an insulated wire to be connected and a mobile element forming a push button ad pted for engagement with the box. The moblle element has a connecting device placed parallel wlth the ~ace of the box and ls movable in a direction parallel with the general direction of the branches of the connecting devlce from a first poæltion in which an inserting opening of the connect-ing device is in llne with the bore, toward a second positiQn in which the end of the 910t remote from the opening ls placed in line with the bore.
The present invention alæo provides for a method of con-nectlng wires without prestripplng the wires, by meanæ of a con-necting block conætituted by an insulating box del~miting an inr.er chamber and belng pierced by at least one bore for receiving an inæulated wire, and a mobile element forming a push-button adapted ~- for engagement with the box and having a connecting device aæ de-, scribed above.
The method comprises the following steps: intro-ducing an insulated wire into each bore of the box; and moving the pushbuttons in the box to bring the wire between the ends of the branches of the connecting device distant from their common portion, ?
The invention is particularly directed toward a self-stripping electrical terminal for making electrical connection with at least one insulated electric wire, The terminal com-prises a strip of resilient metal having at least one U-shaped portion formed of a base portion and two branches extending ;
therefrom, the branches defining an open-ended slot therebetween, ; The U-shaped portion includes an opening between the branches adjacent the base portion, The opening is wider than the slot and is of a predetermined size sufficient to receive an insulated wire, inserted thereinto in a direction generally transversely of the plane of the U-shaped portion, The slot is sized to resiliently engage the conductor of the insulated wire, and is tapered such that the width of the slot decreases with distance ~rom the base portion, The invention is also directed toward a process for establishing an electrical connection between a terminal and an insulated wire having a central conductor and an outer insu-lating sheath, The process comprises the steps o~: forming the terminal in a generally U-shaped configuration with two resilient branches defining an open-ended wire receiving slot, the branches being biased together such that the slot is narrower than the conductor; forming an opening spaced from the open end of the slot and communicating with the slot and being wider than the slot for receiving the insulated wire;
inserting the insulated wire into the opening; and moving the insulated wire outwardly from the opening into the open-ended ~ 4-.
.
.
11153fi~
slot so that the branches pierce the insulating sheath and en-gage the conductor of the wire.
BRIEF DESCRIPTION OF DRAWINGS
The present invention will be better understood from the following description made with reference to the attached drawings in which:
Figure 1 is a front view of a connecting device of the prior art;
Figure 2 is a front view of a double connecting device according to the present invention;
Figure 3 is a perspective exploded view of a connecting block according to the present invention;
Figure 4 is a sectional view of a connecting block according to the present invention before the introduction of the wire;
Figure 5 is a sectional view o~ the connecting block of Figure 4 after insertion of the wire which is to be connected;
Figure 6 represents a sectional view along the direction 6-6 of the connection block of Figure 4;
Figure 7 is a similar view to the one in Figure 4 and shows a connecting block provided with two connecting devices according to the present invention;
Figure 8 is a perspective view of a connecting device according to another embodiment of the present invention; and Figure 9 is a sectional view of a connecting block comprising a connecting device of the type shown in Figure 8.
DETAILED DESCRIPTION OF INVENTION
~ . . . :
Figure 1 represents in elevation a connecting device of the prior art the general shape of which is that of a fork or that of a U, formed of two branches 1 and 2 extending in -parallel directions and delimiting a slot 3 destined for receiving the insulated wire which has to be connected. The .
~-4a-;'''-' ' : , chamferings 4 are provided on the ~ree end o~ the branches of the connecting device for enhancing tbe engagement of the insulated wire to be connected by movement in the direction indicated by the arrow 5. The chamferings 4 and the ends of the branches delimiting the slot 3 are generally provided '~
-4b-;3t~7 with sharp edges, while a recess 6 at the base of the slot 3 has relatively thick, flat edges in view of improving the elasticity of the branches 1 and 2.
Figure 2 represents in elevatlon a terminal device accord-lng to the present invention destined for connecting two insulatedwlres.
Ihis connecting device is cut frGm a conductive metallic plate and comprises an elementary connecting device, ~enerally designated by 12. The elenentary connecting device 12 includes a p~r of branches 14, 15 which define a slot 16 therebetween. A
hole 17 of a larger width than that of the slot 16 prolongs the end Or the slot 16 at the side Or the portion 18 of the spring connect-lng each pair Or branches. me hole 17 constitutes an opening to allow insertlon of the insulated wire 19. This insulated wire 19 i8 subsequently forced into the slot 16, as indicated by the arrow 20. The width of the end of the slot 16 contiguous wlth the open-ing 17 is determined so as to cut the insulating ma~erial of the in-sulated wire 19 wlthout damaging the core of this wire. Ihe in-sulated wire, bared ln this manner, is then brou~ht tcward the other end of the slot 16, the point at which the elasticity of the branches 14 and 15 ls the best. This assures a good resistance to damage fro~ mechanical and thermal shocks to the connectlon.
The width of the slot 16 preferably decreases in the directlon Or movement Or the insulated wire.
me connecting device also includes a portlon generally deslgnated 11 for connection to the element of the electric clrcult to which the lnsulated wire 19 must be connected. In the embodiment shown in Figure 2, this portlon 11 is constltuted by a second elemen- -tary connecting device according to the present invention, ldentlcal to the above-described devlce and attached thereto by the zone 13.
The enga~ement of a second insulated wire 21 by the second elementary connecting device permits the electrical connectlon of the wires 19 and 21 without prestripping either Or the wires.
When the device is used to connect multiple ~trand ln-sulated wires9 it will be easily understood that the engagement ofthls wire by means Or the insertlon orifice guarantees that all Or the strands will be effectlvely engaged in the slot 16.
Figure 3 shows an exploded perspective vlew of a connect-ing block according to the present lnventlon, which includes a con~
:
111~3ti7 .
nectlng device of the type represented in Figure 2. Such a connect-ing block for two insulated electric wires ls constituted of two portions of insulating material: a box 25~ and a mobile element, generally deslgnated by 26. Both portions may be realized~ for example, by a transparent plastic material.
Ihe box 25 of substantially parallelepiped shaped defines an lnner cha~ber 70 for the receptlon of a mobile element 26 through the opening 71 in the face 72 of the box. Ihe face 73 of the box includes two parallel bores 27 and 28, extending perpendicu-larly to the direction of displacement of the mobile element 26 and opening into the inner chamber 70.
The mobile element 26 carries the double connectlng device 29, placed so that the general direction of the branches of this device are parallel with the direction of displacement of the mobile element 26 in the box 25. The connectlng device 29 is held centered in the mobile element 26 by means of protrusions 30 in the cover 31, which flt between the ends of the paired branches of the connecting device, as indicated in Figure 6. A shoulder 32 of the cover holds the connecting device perpendicular to the bores 27, 28 of the box 25, and side faces 22 and 74 of the moblle ele-ment 26 guide the element 26 in the box 25.
Parallel grooves 79 and 78 are provided in the side face 74 of the mobile element for cooperatlon with a rib 76 on the box 25 for assuring a correct positioning of the mobile element in the 25 box, as will be explained in connection with Figures 4 and 5.
Figure 4 shows the connect~ng block according to the present inventlon ln the open position to allow introduction of the insulated wires, such as the wire 19. ~he box 25 includes a shoulder 35 whlch extends into the inner cham~er 70 from the wall 75 of the box opposite the face 72 provided with the opening of the box. m e sur-face 36 of the shoulder 35 guides the connecting device 29, and the end 27 is even with the edges of the bores 27 and 28 and serves to support the inner end of the wire.
In the open positlon represented ln Figure 4, the mobile 35 element 26 ls placed so that the openings 17 of connecting device 29 are in line with the corresponding bores of the box 25. ~his posltloning is releasably maintalned by the cooperation of a semicy-lindrical rib 76 on the lnner surface of the box and a groove 79 in ~' the face 74 of the ncbile element 26.
.... .
lil53~i7 Ihe insulated wire 1~ is lnserted into the bore 27 as indicated by the arrow 803 through the openlng 17 of the connectlng device 29 and, preferably3 its end is brought into engagement with the wall 74 of the mobile element 26.
Subsequently, the mobile element 26 ls forced into the box 25, as indicated ln Figure 5, so as to bring the free ends 81 of the branches of the connecting device 29 into alignment with the bores 27 and 28. me insulated wires are supported simultaneously by the walls of bores 27 and 28 and the end 37 of the shoulder 35. lhe movement o~ the mobile element causes the wlres to be engaged by slot 16 of the connecting de~ice where their insulating sheath is severed and in which they are squeezed by the free ends of the branches of the connecting organ.
It will be understood that the shape of the protrusions 30 Of the cover 31 and of the spaces 33 of the supporting lugs 40 of the connecting device (Figure 6) are determined so as not to limit the elastic restoring force of the ends of the branches of the connecting devlce when the wire is introduced into the device.
In the connected position, the ends 81 of the branches of the connecting organ open (separated from each other) under the ac-tlon of the insulated wire engaged in the slot 16, and the connect-ing device is thus disengaged from cover 31.
The dimensions of the lateral faces 22 and 74 are prefer ably chosen so that the end 82 engages the inner surface o~ the wall 75 of the box in the connected position.
The m~lnt~ining of the m.obile ele~ent 26 in this position is assured by the engagement of the groove 78 of the mobile element with the rib 76 of the box, and the confining action of the shoulders 85 of the box.
Flgure 6 ls a sectional view along the line 6-6 of Figure 4 which shows the protrusions 30 of the cover 31 and the lugs 40 defining the space 33 for accommcdatlng the protrusions 30.
qhe connecting block of the present invention, due to the use of a connectlng device of the type described in connection with Figure 2, permits the connection of insulated wlres of a relatively extended diameter range~ for example between 0.4 and 0.8 mm. It is therefore posslble to connect wires of dlfferent diameters withln such range by means of a standard connector block.
In order to further improve this flexibility of utiliza-.
11153~7 .~tion9 it has been foreseen to provide ln the same connector block a second connecting device shifted backward relative to the directlon of wire insertion into the bores, the spacing of the branches Or whichg before the introduction of the insulated wires into the slots 16, is smaller than that of the first connecting organ. This second device is electrically connected to the first connectlng devlce. Thus, a wire of a large diameter is connected by means of the first connecting organ which is placed near to the oriflce o~
the bores. While the second connecting organ may damage or even cut the core of the cable9 this does not affect the connection, since the connection is realized by the first connecting device.
Similarly, an insulated wire of a small dlameter is not connected by the first (larger) connecting device since the spacing of the - -branches is too large9 but it is correctly connected by the second connecting device. Figure 7 shows a section through a connecting block similar to that represented in Flgure 4 in which a second smaller connecting device 50 has simply been Joined to the back of the first device 29.
Figure 8 shcws in perspective a connecting device 57 formed of a single sheet of metal and comprising first and second double connecting devices, 51 and 52 respectively. Ihe spacing of the palrs OI' branches of the device 51 is smaller than that of the pairs of branches of device 52. The opening 58 forms a guide in the central part of the connecting device 57.
Figure 9 shows a connecting block similar to that shown in Figures 4 and 6/ but incorporating the connecting device of Flgure 8. Ihe box of insulated material 53 includes bores, such as 54, and is adapted for receiving a mobile element generally designated as 60. me mobile element 60 is formed of a cover 55 which carries the connecting devlce 57 and is guided by the cooperation of the guiding hole 58 of the device and the guiding finger 59 of the boY.
Ihe connecting device 57 is placed so that the larger slots of the side 52 are closer to the bores 54. The operation of this connecting block is identical with the block represented in Figure 7.
As a further modificatlon, the connectlng devices accord-lng to the present invention can be provided with sharp edges on the sides of the branches defining the slot 169 but this arrangenent is not necessary ~or connecting wires of small diameters.
lllS367 Additionally, it will be understood that the connecting blocks accordin~ to the present invention can be easily adapted for connecting more than two wires by providing a connecting device which includes sufficient coupled pairs of branches and a corre-sponding number of bores in the box.
Thus, the present lnvention is not limited to the examp~eR
described herein, but ls to be llmited only by the appended claim~.
..
:
': '
Claims (14)
1. A self-stripping electrical terminal for making electrical connection with at least one insulated electric wire, comprising a strip of resilient metal having at least one U-shaped portion formed of a base portion and two branches ex-tending therefrom, said branches defining an open-ended slot therebetween, said U-shaped portion including an opening between said branches adjacent said base portion, said opening being wider than said slot and being of a predetermined size sufficient to receive an insulated wire, inserted thereinto in a direction generally transversely of the plane of said U-shaped portion, said slot being sized to resiliently engage the conductor of the insulated wire, said slot being tapered such that the width of the slot decreases with distance from said base portion.
2. The terminal as claimed in Claim 1, wherein said strip includes a plurality of said U-shaped portions.
3. The terminal as claimed in Claim 2, wherein the slots of said U-shaped portions are parallel to one another.
4. The terminal as claimed in Claim 3, wherein each of said U-shaped portions are positioned in a single plane.
5. The terminal as claimed in Claim 2, wherein said U-shaped portions are arranged in pairs, the U-shaped portions in each pair being in alignment such that a wire inserted through the opening in one said portion will extend through the opening in the associated portions, the slot of one said portion being wider than the slot of the other said portion.
6. A self-stripping electrical connector for making electrical connection with at least one insulated electric wire, comprising: an insulating box member defining an inner chamber;
a movable member slidably received within said chamber; and a terminal device mounted on said member and movable therewith, said terminal device comprising a strip of resilient metal having at least one U-shaped portion formed of a base portion and two branches extending therefrom, said branches defining an open-ended slot therebetween, said U-shaped portion including an opening between said branches adjacent said base portion, said opening being wider than said slot and sized sufficient to receive an insulated wire inserted thereinto in a direction generally transversely of the plane of said U-shaped portion, said box member including at least one bore in communication with said chamber, said bore being positioned such that said bore is aligned with said opening when said movable-member is in a first position and said opening is positioned for accept-ing the insulated wire, and said bore is aligned with a portion of said slot remote from said opening when said movable member is in a second position.
a movable member slidably received within said chamber; and a terminal device mounted on said member and movable therewith, said terminal device comprising a strip of resilient metal having at least one U-shaped portion formed of a base portion and two branches extending therefrom, said branches defining an open-ended slot therebetween, said U-shaped portion including an opening between said branches adjacent said base portion, said opening being wider than said slot and sized sufficient to receive an insulated wire inserted thereinto in a direction generally transversely of the plane of said U-shaped portion, said box member including at least one bore in communication with said chamber, said bore being positioned such that said bore is aligned with said opening when said movable-member is in a first position and said opening is positioned for accept-ing the insulated wire, and said bore is aligned with a portion of said slot remote from said opening when said movable member is in a second position.
7. The connector as claimed in Claim 6, further com-prising at least one second U-shaped portion aligned with respective ones of the first-mentioned U-shaped portions and positioned remote from said bore, the slot of said second U-shaped portion being narrower than the slot of said first-mentioned U-shaped portion.
8. The connector as claimed in Claim 6, wherein said terminal device includes a plurality of U-shaped portions and said box includes a corresponding plurality of bores, the slots of each of said U-shaped portions being parallel.
9. The connector as claimed in Claim 6, wherein said box includes means within said chamber and aligned with said bore for supporting the inner end of a wire inserted through said bore.
10. The connector as claimed in Claim 6, wherein said open-ended slot is tapered such that the width of the slot decreases with the distance from said base portion.
11. A process for establishing an electrical connection between a terminal and an insulated wire having a central conductor and an outer insulating sheath, comprising the steps of: forming the terminal in a generally U-shaped configuration with two resilient branches defining an open-ended wire receiv-ing slot, said branches being biased together such that the slot is narrower than the conductor; forming an opening spaced from the open end of the slot and communicating with the slot and being wider than the slot for receiving the insulated wire;
inserting the insulated wire into said opening; and moving said insulated wire outwardly from said opening into the open-ended slot so that the branches pierce the insulating sheath and en-gage the conductor of the wire.
inserting the insulated wire into said opening; and moving said insulated wire outwardly from said opening into the open-ended slot so that the branches pierce the insulating sheath and en-gage the conductor of the wire.
12. The process of claim 11, wherein said slot is tapered such that the width of the slot decreases with distance from said opening, and said wire is moved outwardly along said tapered slot.
13. The process of claim 11, including the steps of providing an insulating box member defining an inner chamber;
providing a movable member slidably received within said chamber; mounting one of said U-shaped terminal on said movable member for movement therewith; providing a bore in said insul-ating box member in alignment with said opening when said mov-able member is in a first position and said opening is positioned for accepting the insulated wire; and moving said movable mem-ber to a second position wherein said bore is aligned with a portion of said slot remote from said opening to thereby move said wire outwardly from said opening into said slot.
providing a movable member slidably received within said chamber; mounting one of said U-shaped terminal on said movable member for movement therewith; providing a bore in said insul-ating box member in alignment with said opening when said mov-able member is in a first position and said opening is positioned for accepting the insulated wire; and moving said movable mem-ber to a second position wherein said bore is aligned with a portion of said slot remote from said opening to thereby move said wire outwardly from said opening into said slot.
14. A self-stripping electrical connector for making electrical connection with at least one insulated electric wire, comprising: an insulating box member defining an inner chamber; a movable member slidably received within said chamber;
and terminal means mounted on said movable member and movable therewith, said terminal means comprising a forward pair of U-shaped portions and a rearward pair of U-shaped portions, the U-shaped portions of each pair being in a common plane generally parallel to the U-shaped portions of the other pair; each U-shaped portion of each pair being formed of a base and two branches extending therefrom, said branches defining an open-ended slot therebetween to resiliently engage the conductor of an insulated wire, each U-shaped portion further including an opening between said branches adjacent said base and said opening being wider than said slot to receive an insulated wire inserted thereinto in a direction generally transversely of the plane of said U-shaped portion, said box including a bore in alignment with each of said openings when said movable member is in a first position and said opening is positioned for accepting the insulated wire, and said bore is aligned with a portion of the respective slot remote from said opening when said movable member is in a second position, the slots of said forward pair of U-shaped portions being in alignment with the slots of said rearward pair of U-shaped portions, and the slots of said forward pair of U-shaped portions being wider than the slots of said rearward pair of U-shaped portions so that narrow diameter wires can be inserted through the slots of said for-ward U-shaped portions without interference for termination with the rearward U-shaped portions.
and terminal means mounted on said movable member and movable therewith, said terminal means comprising a forward pair of U-shaped portions and a rearward pair of U-shaped portions, the U-shaped portions of each pair being in a common plane generally parallel to the U-shaped portions of the other pair; each U-shaped portion of each pair being formed of a base and two branches extending therefrom, said branches defining an open-ended slot therebetween to resiliently engage the conductor of an insulated wire, each U-shaped portion further including an opening between said branches adjacent said base and said opening being wider than said slot to receive an insulated wire inserted thereinto in a direction generally transversely of the plane of said U-shaped portion, said box including a bore in alignment with each of said openings when said movable member is in a first position and said opening is positioned for accepting the insulated wire, and said bore is aligned with a portion of the respective slot remote from said opening when said movable member is in a second position, the slots of said forward pair of U-shaped portions being in alignment with the slots of said rearward pair of U-shaped portions, and the slots of said forward pair of U-shaped portions being wider than the slots of said rearward pair of U-shaped portions so that narrow diameter wires can be inserted through the slots of said for-ward U-shaped portions without interference for termination with the rearward U-shaped portions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7804786A FR2417861A1 (en) | 1978-02-20 | 1978-02-20 | DEVICE AND METHOD FOR NON-STRIPPING ELECTRIC WIRES |
| FR78.04786 | 1978-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1115367A true CA1115367A (en) | 1981-12-29 |
Family
ID=9204790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA321,776A Expired CA1115367A (en) | 1978-02-20 | 1979-02-19 | Self-stripping electrical terminal |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4274198A (en) |
| JP (1) | JPS54129388A (en) |
| CA (1) | CA1115367A (en) |
| DE (1) | DE2906031A1 (en) |
| FR (1) | FR2417861A1 (en) |
| GB (2) | GB2015832B (en) |
| IT (1) | IT1110816B (en) |
| NL (1) | NL7901229A (en) |
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| FR2330159A1 (en) * | 1975-10-27 | 1977-05-27 | Carpano & Pons | CLAMP FOR THE CONNECTION OF ELECTRIC CONDUCTORS |
| CA1072649A (en) * | 1976-01-07 | 1980-02-26 | Robert H. Frantz | Insulated electrical connector housing |
| US4035049A (en) * | 1976-02-10 | 1977-07-12 | Trw Inc. | Universal solderless termination system |
| FR2353968A1 (en) * | 1976-06-04 | 1977-12-30 | Wechsler Bernard | Junction block for single conductor cables - has screw clamps gripping cables end to end in conducting block |
| US4062614A (en) * | 1976-07-30 | 1977-12-13 | Bell Telephone Laboratories, Incorporated | Insulation piercing slotted beam electrical connector |
| US4068912A (en) * | 1977-02-25 | 1978-01-17 | Amp Incorporated | Cable clamping insulation displacing electrical connector for multi-conductor flat flexible cable |
| US4047784A (en) * | 1976-12-28 | 1977-09-13 | Hollingsworth Solderless Terminal Company | Tap splice connector |
-
1978
- 1978-02-20 FR FR7804786A patent/FR2417861A1/en active Granted
-
1979
- 1979-02-09 US US06/010,667 patent/US4274198A/en not_active Expired - Lifetime
- 1979-02-12 GB GB7904869A patent/GB2015832B/en not_active Expired
- 1979-02-12 GB GB8130043A patent/GB2100072B/en not_active Expired
- 1979-02-16 NL NL7901229A patent/NL7901229A/en not_active Application Discontinuation
- 1979-02-16 DE DE19792906031 patent/DE2906031A1/en not_active Withdrawn
- 1979-02-19 CA CA321,776A patent/CA1115367A/en not_active Expired
- 1979-02-19 JP JP1734679A patent/JPS54129388A/en active Pending
- 1979-02-20 IT IT20356/79A patent/IT1110816B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| FR2417861B1 (en) | 1981-06-12 |
| GB2015832B (en) | 1983-01-12 |
| GB2100072A (en) | 1982-12-15 |
| NL7901229A (en) | 1979-08-22 |
| FR2417861A1 (en) | 1979-09-14 |
| GB2015832A (en) | 1979-09-12 |
| JPS54129388A (en) | 1979-10-06 |
| DE2906031A1 (en) | 1979-08-23 |
| GB2100072B (en) | 1983-06-02 |
| IT7920356A0 (en) | 1979-02-20 |
| US4274198A (en) | 1981-06-23 |
| IT1110816B (en) | 1986-01-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |