CA2041982A1 - Magnetic detection apparatus and method of manufacturing same - Google Patents
Magnetic detection apparatus and method of manufacturing sameInfo
- Publication number
- CA2041982A1 CA2041982A1 CA002041982A CA2041982A CA2041982A1 CA 2041982 A1 CA2041982 A1 CA 2041982A1 CA 002041982 A CA002041982 A CA 002041982A CA 2041982 A CA2041982 A CA 2041982A CA 2041982 A1 CA2041982 A1 CA 2041982A1
- Authority
- CA
- Canada
- Prior art keywords
- unit
- plate
- tube
- detection apparatus
- accordance
- 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.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
Abstract
Abstract of the Disclosure A magnetic detection apparatus (magnetic locator) comprises a housing constituted by a first integral molded plastic unit and a second integral molded plas-tic unit that are joined. The first unit has a tube with a plate at one end thereof transverse to the length of the tube, the plate having an opening through which a magnetic sensor assembly is inserted into the tube. The second unit has a cover open at one end and having a tubular handle at the opposite end, by which the user may grasp the apparatus. Attachment of the cover to the plate closes the open end of the cover to provide a casing. Magnetic sensors are mounted on a channel or angle structural member that is rigidly attached to the chassis of an electrical unit mounted in the casing. Sound from a loudspeaker mounted on the chassis is transmitted through the handle to the exterior of the apparatus. The chassis also supports a meter that is visible through an opening in an end wall of the cover adjacent to the handle.
Description
20~1982 TITLE: MAGNETIC DETECTION APPARATUS AND METHOD
OF MANUFACTURING SAME
INVENTOR: ERICK O. SCHONSTEDT
S P E C I F I C A T I O N
Backqround of the Invention This invention is concerned with magnetic detection apparatus, particularly of the type employing fluxgate sensors for locating magnetic objects.
A magnetic locator presently marketed by the assignee of the present invention is disclosed, for example, in U.S. Patents 3,894,283; 3,909,704;
3,961,245; 4,110,689; and 4,163,877 and has been highly successful. As is evident from the foregoing patents, the locator and its method of manufacture are superior in several significant respects compared to the prior art. The present invention provides further sig-nificant improvements, as will become apparent herein-after. The following brief description of the magnetic locator presently marketed will provide a background for those improvements~
~he housing of the locator presently marketed is assembled from several separate components including an aluminum tube, an aluminum plate that is attached to one end of the tube, and an aluminum cover that is attached to the plate to form a casing. The user holds 20~1982 the locator by grasping the tube or the casing. A
sensor assembly is formed by mounting a pair of mag-netic sensors in oppositely directed notches at the ends of an aluminum sensorsupport tube. One sensor is pre-assembled with a stiff excitation wire that is passed through the tube and is then assembled with the other sensor. Signal leads from the sensors extend along the exterior of the sensor-support tube. Thick foam pads are taped to the exterior of the sensor-support tube, and then the seneor assembly is inserted in the tube of the housing. The excitation wire is then soldered to a printed circuit board mounted on a chassis of an electrical unit that is mounted on the plate of the housing. By virtue of the excitation wire and the foam pads, the position of the sensor assembly relative to the electrical unit is established, but to prevent the possibility of any relative movement that is likely to produce a measurement error, a U-shaped bail has its ends bent into notches in the sensor-support tube and its bight attached to the chassis by a screw. An ON/OFF sensitivity control is also mounted on the plate of the housing and is connected to the printed circuit board by flexible leads.
Brief Description of the Present Invention The present invention improves upon the above-described magnetic detection apparatus in several respects. The housing of the invention is constituted by two molded plastic units, one of whiah is a tube having a plate at one end, and the other of which is a cover with an open end that i5 closed by the plate to form a casing, and that has a tubular handle extending from its opposite end. The plastic housing is less expensive to manufacture and requires fewer assembly steps.
The magnetic sensor assembly of the invention comprises a sensor support that is a channel or angle .
:
structural member entirely open at one side, so that the magnetic sensors may be preassembled with the excitation wire and then placed on the sensor support via the open side. The sensors are then adhesively attached to the support. A rigid strip attaches the support to the chassis of the electrical unit, so that the position of the sensor assembly relative to the chassis is fixed and so that the sensor assembly and the electrical unit form a unitary structure for assem-bly with the housing. For this purpose, the sensor assembly is inserted into the tube of the housing at the same time that the chassis is ~uxtaposed with the plate of the housing.
The O~/OFF sensitivity control i8 rigidly mounted on the printed circuit board and has a shaft that extends through an opening in the housing plate when the chassis is juxtaposed with the plate. The tubular handle of the housing facilitates grasping of the locator by the user and also serves to transmit an acoustic indication from the interior of the casing to the user. The locator of the invention also includes a meter that is visible through an end wall of the casing adjacent to the handle.
Brief Description of the Drawings The invention will be further described in con-junction with the accompanying drawings, which illus-trate preferred (best mode) embodiments, and wherein:
Fig. 1 is a side elevation view of magnetic detec-tion apparatus in accordance with the invention:
Fig. 2 is a side elevation view of a first unit forming part of the housing of the apparatus;
Fig. 3 is a side elevation view of a second unit forming part of the housing;
Fig. 4 is a left end view of the apparatus of Fig.
1;
Fig. 5 is a right end view of the apparatus of Fig. l;
Fig. 6 is a side elevation view of a magnetic sensor assembly and electrical unit contained within the housing of Figs. 1-5;
Figs. 7 and 8 are transverse sectional views showing alternative supports for the sensors; and Fig. 9 is a fragmentary longitudinal vertical sectional view showing a meter at a portion of the second housing unit shown in Fig. 3.
Detailed Description of Preferred Embodiments As shown in Figs. 1-3, in accordance with the invention, a housing 10 comprises a tube 12, a casing 14, and a tubular handle 16. The housing iæ formed in two parts 10A, 10B, each of which is an integral molded plastic unit. One part, 10A, shown in Fig. 2, includes the tube 12 with a stepped plate 18 at one end trans-verse to the length of the tube. The plate 18 con-stitutes an end wall of the casing 14 and has a central hole 20 therethrough. The tube 12 is reinforced by fins 22 (see Figs. 2 and 4) and has a rubber crutch tip 24 at the end opposite to the plate. The other part, 10B, of the housing, shown in Fig. 3, includes a cup-shaped cover 26 of the casing 14, and the tubular handle 16, which may have a plastic or rubber grip 28.
The cover is open at one end 30 and has an end wall 32 at the opposite end. The cover is attaahed to the plate 18 by ~our threaded studs 34 pro~ecting from bosses of the side wall 36 at the open end. The studs extend through openings in the plate and receive nuts 40 thereon, as shown in Fig. 4.
Fig. 6 illustrates apparatus 42 that is received within the housing 10. As shown, this apparatus com-prises a sensor assembly 43 that includes a pair of fluxgate magnetic sensors 44 mounted on a support 46, preferably an aluminum channel or angle structural ' member entirely open at one side. See channel 46A and angle 46B in Figs. 7 and 8, respectively. The sensors may be pre-assembled with an excitation wire (not shown) to form a sub-assembly that is placed on the support 46 via the open side of the support. Each of the sensors is embraced by the walls of the support and is attached thereto by adhesive. Foam pads 48 are placed around each sensor, as shown in Figs. 7 and 8, and tape 50 is wrapped around the foam pads and the support, as shown in Fig. 6, to assist in holding the sensors on the support. Unlike the pads of the pre-sently marketed locator, the pads 48 do not partake in maintaining the longitudinal position of the sensor assembly in the housing. As stated earlier, the support 46 of the invention and the manner in which the sensors are installed on the support are simpler and less expensive compared to the locator presently marketed.
The apparatus of Fig. 6 also comprises an elec-trical unit 52 that includes an aluminum chassis 54.
The chassis has a flange 56 at one end for attaching the chassis to the plate 18. A flat aluminum strip 58 has one end attached to the support and the opposite end attached to the chassis, by rivets 60. The sensor assembly is accordingly rigidly attached to the elec-trical unit 52 as a cantilever extending from the electrical unit, so that its position relative to the electrical unit cannot vary. Unlike the presently marketed locator, in the invention there i5 no reliance upon the stiff excitation wire to establish the position of the sensor assembly relative to the elec-trical unit, and the bail employed heretofore to main-tain the position is not required. A battery carrier 62 is mounted on the chassis at one side thereof, and a printed circuit board 64 is mounted on the chassis at the opposite side, by ~tandoffs 66. Batteries (not shown) supply electrical power to circuit components ~ ;
(not shown) cooperable with the magnetic sensors to detect magnetic objects. The circuit components and the manner in which they and the sensors operate to detect magnetic objects are well known and will not be described in detail. Succinctly stated, an oscillator provides AC excitation to magnetic cores of the sensors via the excitation wire to drive the cores into satura-tion on opposite half cycles of the excitation fre-quency. In the absence of a magnetic ob;ect to be detected, signal coils wound around the cores produce a balanced output. When a magnetic ob;ect is present, the output becomes unbalanced, and the detection of the object is indicated, acoustically, for example.
To provide an acoustic indication, an electro-acoustic transducer, more particularly a loudspeaker 68, is mounted on oppositely directed flanges 70 of the chassis. The speaker is preferably mounted, as dis-closed in U.S. Patent 4,163,877, on a pair of threaded studs 72 that project from the flanges 70. The studs extend through corresponding holes in the frame 74 of the speaker, which is biased away from the flanges by coil springs 76 on the studs at one side of the frame.
At the opposite side of the frame, O-ring~c 78 are placed on the threads of the studs. The studs extend through holes in the end wall 32 of the cover and receive nuts 79 thereon, as shown in Fig. 5. The inner surface of the end wall presses against the O-rings to compress the aoil springs, so that the speaker i8 held against the end wall resiliently.
When the electrical unit 52 is housed within the casing 14, the speaker is aligned with an end of the hollow handle 16 open to the interior of the casing.
The other end of the handle is covered by a sound-pervious water-resistant screen or shield 80 (Fig. 5).
Sound from the speaker is transmitted by the hollow handle to the exterior of the apparatus. As shown in Fig. 6, the electrical unit preferably includes a ' i .
-` 20~1~82 center-zero meter 82 that is mounted on the printed circuit board 64 by means of an aluminum meter support plate 84 and standoffs 86. The indicating portion of the meter projects through an opening in the end wall 32 of the cover, as shown in Fig. 9, and is sealed thereto by a bezel and gasket assembly 90. See Figs.
5, 6, and 9. A plastic magnet 91 may be mounted on plate 84 to compensate for magnetic fields of the meter and the speaker.
~s also shown in Fig. 6, an ON/OFF sensitivity control 92 is rigidly mounted on the printed circuit board by short stiff leads 94 that are soldered to the board. The shaft 96 of the control projects through an opening in the plate 18 and receives a knob 100, as shown in Fig. 4. A headphone jack 102 shown in Fig. 4 may also be rigidly mounted on the printed circuit board so as to project through a corresponding opening in the plate 18.
Assembly of the apparatus of the invention is quite simple, requiring little manual labor. The apparatus shown in Fig. 6 is assembled as described earlier. This apparatus is moved as a unitary structure relative to the part 10A of the housing shown in Fig. 2, so as to insert the sensor assembly 43 into the tube 12 through the hole 20 in the plate 18 and to juxtapose the flange 56 of the chassis with the plate.
The shaft 96 of the control 92 and the headphone jack 102 enter the corresponding holes in the plate as the flange 56 approaches the plate. This is a simpler procedure than the assembly method for the presently marketed locator, in which the sensor assembly is inserted in the housing tube in an operation separate from the mounting of the electriaal unit on the plate, after which the sensor assembly and the electrical unit must be connected mechanically and electrically.
Moreover, in the invention, the mounting of the control 92 is simpler than in the presently marketed locator, 20~1982 in which the control is mounted on the plate and is connected to the printed circuit board by flexible leads.
The chassis 54 is secured to the plate 18 by screws 104 threaded into the chassis through corres-ponding holes in the plate. See Fig. 4. The knob 100 is then placed on the shaft of the control, and a hex-ring 106 is threaded onto the headphone jack. Then the cover 26 shown in Fig. 3 is moved longitudinally over the electrical unit 52 so as to seat the open end 30 of the cover on the plate 18. The mounting studs 34 enter corresponding holes in the plate and receive nuts 40, as described earlier. The meter 82 and the loudspeaker 68 are disposed relative to the end wall 32 of the cover and the handle 16, as also described earlier.
To use the apparatus, the handle is grasped manually, and the crutch tip end of the housing 10 is swept over the ground to locate buried magnetic objects, in the same manner as the locator presently marketed. Detection of magnetic objects is indicated by both the speaker 68 and the meter 82.
While preferred embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that changes can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
The invention claimed is:
OF MANUFACTURING SAME
INVENTOR: ERICK O. SCHONSTEDT
S P E C I F I C A T I O N
Backqround of the Invention This invention is concerned with magnetic detection apparatus, particularly of the type employing fluxgate sensors for locating magnetic objects.
A magnetic locator presently marketed by the assignee of the present invention is disclosed, for example, in U.S. Patents 3,894,283; 3,909,704;
3,961,245; 4,110,689; and 4,163,877 and has been highly successful. As is evident from the foregoing patents, the locator and its method of manufacture are superior in several significant respects compared to the prior art. The present invention provides further sig-nificant improvements, as will become apparent herein-after. The following brief description of the magnetic locator presently marketed will provide a background for those improvements~
~he housing of the locator presently marketed is assembled from several separate components including an aluminum tube, an aluminum plate that is attached to one end of the tube, and an aluminum cover that is attached to the plate to form a casing. The user holds 20~1982 the locator by grasping the tube or the casing. A
sensor assembly is formed by mounting a pair of mag-netic sensors in oppositely directed notches at the ends of an aluminum sensorsupport tube. One sensor is pre-assembled with a stiff excitation wire that is passed through the tube and is then assembled with the other sensor. Signal leads from the sensors extend along the exterior of the sensor-support tube. Thick foam pads are taped to the exterior of the sensor-support tube, and then the seneor assembly is inserted in the tube of the housing. The excitation wire is then soldered to a printed circuit board mounted on a chassis of an electrical unit that is mounted on the plate of the housing. By virtue of the excitation wire and the foam pads, the position of the sensor assembly relative to the electrical unit is established, but to prevent the possibility of any relative movement that is likely to produce a measurement error, a U-shaped bail has its ends bent into notches in the sensor-support tube and its bight attached to the chassis by a screw. An ON/OFF sensitivity control is also mounted on the plate of the housing and is connected to the printed circuit board by flexible leads.
Brief Description of the Present Invention The present invention improves upon the above-described magnetic detection apparatus in several respects. The housing of the invention is constituted by two molded plastic units, one of whiah is a tube having a plate at one end, and the other of which is a cover with an open end that i5 closed by the plate to form a casing, and that has a tubular handle extending from its opposite end. The plastic housing is less expensive to manufacture and requires fewer assembly steps.
The magnetic sensor assembly of the invention comprises a sensor support that is a channel or angle .
:
structural member entirely open at one side, so that the magnetic sensors may be preassembled with the excitation wire and then placed on the sensor support via the open side. The sensors are then adhesively attached to the support. A rigid strip attaches the support to the chassis of the electrical unit, so that the position of the sensor assembly relative to the chassis is fixed and so that the sensor assembly and the electrical unit form a unitary structure for assem-bly with the housing. For this purpose, the sensor assembly is inserted into the tube of the housing at the same time that the chassis is ~uxtaposed with the plate of the housing.
The O~/OFF sensitivity control i8 rigidly mounted on the printed circuit board and has a shaft that extends through an opening in the housing plate when the chassis is juxtaposed with the plate. The tubular handle of the housing facilitates grasping of the locator by the user and also serves to transmit an acoustic indication from the interior of the casing to the user. The locator of the invention also includes a meter that is visible through an end wall of the casing adjacent to the handle.
Brief Description of the Drawings The invention will be further described in con-junction with the accompanying drawings, which illus-trate preferred (best mode) embodiments, and wherein:
Fig. 1 is a side elevation view of magnetic detec-tion apparatus in accordance with the invention:
Fig. 2 is a side elevation view of a first unit forming part of the housing of the apparatus;
Fig. 3 is a side elevation view of a second unit forming part of the housing;
Fig. 4 is a left end view of the apparatus of Fig.
1;
Fig. 5 is a right end view of the apparatus of Fig. l;
Fig. 6 is a side elevation view of a magnetic sensor assembly and electrical unit contained within the housing of Figs. 1-5;
Figs. 7 and 8 are transverse sectional views showing alternative supports for the sensors; and Fig. 9 is a fragmentary longitudinal vertical sectional view showing a meter at a portion of the second housing unit shown in Fig. 3.
Detailed Description of Preferred Embodiments As shown in Figs. 1-3, in accordance with the invention, a housing 10 comprises a tube 12, a casing 14, and a tubular handle 16. The housing iæ formed in two parts 10A, 10B, each of which is an integral molded plastic unit. One part, 10A, shown in Fig. 2, includes the tube 12 with a stepped plate 18 at one end trans-verse to the length of the tube. The plate 18 con-stitutes an end wall of the casing 14 and has a central hole 20 therethrough. The tube 12 is reinforced by fins 22 (see Figs. 2 and 4) and has a rubber crutch tip 24 at the end opposite to the plate. The other part, 10B, of the housing, shown in Fig. 3, includes a cup-shaped cover 26 of the casing 14, and the tubular handle 16, which may have a plastic or rubber grip 28.
The cover is open at one end 30 and has an end wall 32 at the opposite end. The cover is attaahed to the plate 18 by ~our threaded studs 34 pro~ecting from bosses of the side wall 36 at the open end. The studs extend through openings in the plate and receive nuts 40 thereon, as shown in Fig. 4.
Fig. 6 illustrates apparatus 42 that is received within the housing 10. As shown, this apparatus com-prises a sensor assembly 43 that includes a pair of fluxgate magnetic sensors 44 mounted on a support 46, preferably an aluminum channel or angle structural ' member entirely open at one side. See channel 46A and angle 46B in Figs. 7 and 8, respectively. The sensors may be pre-assembled with an excitation wire (not shown) to form a sub-assembly that is placed on the support 46 via the open side of the support. Each of the sensors is embraced by the walls of the support and is attached thereto by adhesive. Foam pads 48 are placed around each sensor, as shown in Figs. 7 and 8, and tape 50 is wrapped around the foam pads and the support, as shown in Fig. 6, to assist in holding the sensors on the support. Unlike the pads of the pre-sently marketed locator, the pads 48 do not partake in maintaining the longitudinal position of the sensor assembly in the housing. As stated earlier, the support 46 of the invention and the manner in which the sensors are installed on the support are simpler and less expensive compared to the locator presently marketed.
The apparatus of Fig. 6 also comprises an elec-trical unit 52 that includes an aluminum chassis 54.
The chassis has a flange 56 at one end for attaching the chassis to the plate 18. A flat aluminum strip 58 has one end attached to the support and the opposite end attached to the chassis, by rivets 60. The sensor assembly is accordingly rigidly attached to the elec-trical unit 52 as a cantilever extending from the electrical unit, so that its position relative to the electrical unit cannot vary. Unlike the presently marketed locator, in the invention there i5 no reliance upon the stiff excitation wire to establish the position of the sensor assembly relative to the elec-trical unit, and the bail employed heretofore to main-tain the position is not required. A battery carrier 62 is mounted on the chassis at one side thereof, and a printed circuit board 64 is mounted on the chassis at the opposite side, by ~tandoffs 66. Batteries (not shown) supply electrical power to circuit components ~ ;
(not shown) cooperable with the magnetic sensors to detect magnetic objects. The circuit components and the manner in which they and the sensors operate to detect magnetic objects are well known and will not be described in detail. Succinctly stated, an oscillator provides AC excitation to magnetic cores of the sensors via the excitation wire to drive the cores into satura-tion on opposite half cycles of the excitation fre-quency. In the absence of a magnetic ob;ect to be detected, signal coils wound around the cores produce a balanced output. When a magnetic ob;ect is present, the output becomes unbalanced, and the detection of the object is indicated, acoustically, for example.
To provide an acoustic indication, an electro-acoustic transducer, more particularly a loudspeaker 68, is mounted on oppositely directed flanges 70 of the chassis. The speaker is preferably mounted, as dis-closed in U.S. Patent 4,163,877, on a pair of threaded studs 72 that project from the flanges 70. The studs extend through corresponding holes in the frame 74 of the speaker, which is biased away from the flanges by coil springs 76 on the studs at one side of the frame.
At the opposite side of the frame, O-ring~c 78 are placed on the threads of the studs. The studs extend through holes in the end wall 32 of the cover and receive nuts 79 thereon, as shown in Fig. 5. The inner surface of the end wall presses against the O-rings to compress the aoil springs, so that the speaker i8 held against the end wall resiliently.
When the electrical unit 52 is housed within the casing 14, the speaker is aligned with an end of the hollow handle 16 open to the interior of the casing.
The other end of the handle is covered by a sound-pervious water-resistant screen or shield 80 (Fig. 5).
Sound from the speaker is transmitted by the hollow handle to the exterior of the apparatus. As shown in Fig. 6, the electrical unit preferably includes a ' i .
-` 20~1~82 center-zero meter 82 that is mounted on the printed circuit board 64 by means of an aluminum meter support plate 84 and standoffs 86. The indicating portion of the meter projects through an opening in the end wall 32 of the cover, as shown in Fig. 9, and is sealed thereto by a bezel and gasket assembly 90. See Figs.
5, 6, and 9. A plastic magnet 91 may be mounted on plate 84 to compensate for magnetic fields of the meter and the speaker.
~s also shown in Fig. 6, an ON/OFF sensitivity control 92 is rigidly mounted on the printed circuit board by short stiff leads 94 that are soldered to the board. The shaft 96 of the control projects through an opening in the plate 18 and receives a knob 100, as shown in Fig. 4. A headphone jack 102 shown in Fig. 4 may also be rigidly mounted on the printed circuit board so as to project through a corresponding opening in the plate 18.
Assembly of the apparatus of the invention is quite simple, requiring little manual labor. The apparatus shown in Fig. 6 is assembled as described earlier. This apparatus is moved as a unitary structure relative to the part 10A of the housing shown in Fig. 2, so as to insert the sensor assembly 43 into the tube 12 through the hole 20 in the plate 18 and to juxtapose the flange 56 of the chassis with the plate.
The shaft 96 of the control 92 and the headphone jack 102 enter the corresponding holes in the plate as the flange 56 approaches the plate. This is a simpler procedure than the assembly method for the presently marketed locator, in which the sensor assembly is inserted in the housing tube in an operation separate from the mounting of the electriaal unit on the plate, after which the sensor assembly and the electrical unit must be connected mechanically and electrically.
Moreover, in the invention, the mounting of the control 92 is simpler than in the presently marketed locator, 20~1982 in which the control is mounted on the plate and is connected to the printed circuit board by flexible leads.
The chassis 54 is secured to the plate 18 by screws 104 threaded into the chassis through corres-ponding holes in the plate. See Fig. 4. The knob 100 is then placed on the shaft of the control, and a hex-ring 106 is threaded onto the headphone jack. Then the cover 26 shown in Fig. 3 is moved longitudinally over the electrical unit 52 so as to seat the open end 30 of the cover on the plate 18. The mounting studs 34 enter corresponding holes in the plate and receive nuts 40, as described earlier. The meter 82 and the loudspeaker 68 are disposed relative to the end wall 32 of the cover and the handle 16, as also described earlier.
To use the apparatus, the handle is grasped manually, and the crutch tip end of the housing 10 is swept over the ground to locate buried magnetic objects, in the same manner as the locator presently marketed. Detection of magnetic objects is indicated by both the speaker 68 and the meter 82.
While preferred embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that changes can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
The invention claimed is:
Claims (21)
1. Magnetic detection apparatus comprising a housing having a first integral unit and a second integral unit, the first unit including a tube with a plate at one end thereof transverse to the length of the tube and having a hole therein aligned with the tube, the second unit including a cover, one end of which is closed by said plate to form a casing and the opposite end of which has a handle for grasping the apparatus, means for fastening said first unit to said second unit, a sensor assembly including a pair of spaced magnetic sensors mounted on an elongated support in said tube, and an electrical unit mounted in said casing and electrically and mechanically connected to said sensor assembly via the hole in said plate, said electrical unit comprising means cooperable with said sensors to detect magnetic objects and having means for indicating the detection of magnetic objects.
2. Magnetic detection apparatus in accordance with Claim 1, wherein said tube and said plate are constructed of molded plastic, and said cover and said handle are constructed of molded plastic.
3. Magnetic detection apparatus in accordance with Claim 1, wherein said sensor assembly forms a cantilever extending rigidly from said electrical unit.
4. Magnetic detection apparatus in accordance with Claim 3, wherein said electrical unit is mounted on said plate.
5. Magnetic detection apparatus in accordance with Claim 1, wherein said indicating means comprises an electro-acoustic transducer, and said handle is a tube providing a path for the transmission of sound from said transducer to the exterior of said apparatus.
6. Magnetic detection apparatus in accordance with Claim 5, wherein said transducer is aligned with an open end of said handle interiorly of said casing and said handle has a shielded opening at the opposite end.
7. Magnetic detection apparatus in accordance with Claim 1, wherein said indicating means comprises a meter visible through an opening in a wall of said cover at said opposite end.
8. Magnetic detection apparatus in accordance with Claim 1, wherein said electrical unit comprises a chassis having mounted thereon a printed circuit board and said indicating means, wherein said chassis is attached to said plate, and wherein said support of said sensor assembly is rigidly attached to said chassis as a cantilever.
9. Magnetic detection apparatus in accordance with Claim 8, wherein said support comprises an elongated channel or angle structural member entirely open at one side thereof and embracing and adhesively attached to said sensors.
10. Magnetic detection apparatus in accordance with Claim 9, wherein said sensor assembly includes pads between said support and said tube.
11. Magnetic detection apparatus in accordance with Claim 8, wherein said indicating means comprises a loudspeaker aligned with said handle, and said handle comprises a tube through which sound from said loud-speaker is transmitted to the exterior of said apparatus.
12. Magnetic detection apparatus in accordance with Claim 8, wherein said indicating means comprises a meter visible through an opening in a wall of said cover at said opposite end.
13. Magnetic detection apparatus in accordance with Claim 8, further comprising control means for said electrical unit rigidly mounted on said printed circuit board and having an operating member aligned with an opening in said plate.
14. A housing for magnetic detection apparatus, comprising a first integral molded plastic unit and a second integral molded plastic unit, the first unit including a tube with a plate at one end thereof trans-verse to the length of the tube and having a hole through which a magnetic sensor assembly may be inserted into the tube, the second unit including a cover, one end of which is closed by said plate to form a casing and the opposite end of which has a handle for grasping the housing, and means for fastening said first unit to said second unit.
15. A housing in accordance with Claim 14, where-in the handle is a tube providing a path for the trans-mission of sound from the interior of the casing to the exterior of the casing.
16. A housing in accordance with Claim 14, where-in said opposite end of said cover has an end wall with an opening therethrough whereby a meter in the casing may be viewed.
17. Magnetic detection apparatus comprising a magnetic sensor assembly including a pair of spaced magnetic sensors mounted on a support, said support comprising a channel or angle structural member entire-ly open at one side and embracing said sensors.
18. Magnetic detection apparatus in accordance with Claim 17, further comprising an electrical unit including a chassis, said support being rigidly attached to said chassis and extending therefrom as a cantilever.
19. A method of manufacturing magnetic detection apparatus, comprising:
providing a housing constituted by a first integral molded plastic unit and a second integral molded plastic unit, the first unit including a tube having a plate at one end thereof transverse to the length of the tube and provided with a hole there-through, the second unit including a cover open at one end and having a handle at the opposite end;
providing a unitary assembly of a pair of spaced magnetic sensors mounted on a support, and an elec-trical unit to which said support is rigidly attached as a cantilever;
moving said unitary assembly relative to said first housing unit 60 as to insert said support and said sensors into said tube through said opening in said plate and so as to juxtapose said electrical unit with said plate;
attaching said electrical unit to said plate;
moving said second housing unit relative to said first housing unit so as to place said cover over said electrical unit and so as to close the open end of said cover with said plate; and fastening said cover to said plate.
providing a housing constituted by a first integral molded plastic unit and a second integral molded plastic unit, the first unit including a tube having a plate at one end thereof transverse to the length of the tube and provided with a hole there-through, the second unit including a cover open at one end and having a handle at the opposite end;
providing a unitary assembly of a pair of spaced magnetic sensors mounted on a support, and an elec-trical unit to which said support is rigidly attached as a cantilever;
moving said unitary assembly relative to said first housing unit 60 as to insert said support and said sensors into said tube through said opening in said plate and so as to juxtapose said electrical unit with said plate;
attaching said electrical unit to said plate;
moving said second housing unit relative to said first housing unit so as to place said cover over said electrical unit and so as to close the open end of said cover with said plate; and fastening said cover to said plate.
20. A method in accordance with Claim 19, wherein said support is formed as a channel or angle structural member entirely open at one side thereof and said magnetic sensors are placed on said structural member via said open side and are embraced by said structural member.
21. A method in accordance with Claim 19, wherein said electrical unit is provided with a printed circuit board on which a control is rigidly mounted and wherein said plate is provided with an opening therethrough that is aligned with an operating member of said con-trol when said electrical unit is attached to said plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/528,414 US5097211A (en) | 1990-05-25 | 1990-05-25 | Magnetic detection appartaus with plastic housing and sound-transmissive handle |
| US528,414 | 1990-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2041982A1 true CA2041982A1 (en) | 1991-11-26 |
Family
ID=24105593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002041982A Abandoned CA2041982A1 (en) | 1990-05-25 | 1991-05-07 | Magnetic detection apparatus and method of manufacturing same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5097211A (en) |
| JP (1) | JPH04231891A (en) |
| CA (1) | CA2041982A1 (en) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2270981A (en) * | 1992-08-12 | 1994-03-30 | Mini Agriculture & Fisheries | Locating magnetically tagged concealed equipment. |
| US5959451A (en) * | 1997-08-18 | 1999-09-28 | Torfino Enterprises, Inc. | Metal detector with vibrating tactile indicator mounted within a compact housing |
| US20100272885A1 (en) * | 2006-08-16 | 2010-10-28 | SeekTech, Inc., a California corporation | Marking Paint Applicator for Portable Locator |
| US8700325B2 (en) * | 2007-03-13 | 2014-04-15 | Certusview Technologies, Llc | Marking apparatus and methods for creating an electronic record of marking operations |
| US8060304B2 (en) * | 2007-04-04 | 2011-11-15 | Certusview Technologies, Llc | Marking system and method |
| US7640105B2 (en) | 2007-03-13 | 2009-12-29 | Certus View Technologies, LLC | Marking system and method with location and/or time tracking |
| US8473209B2 (en) | 2007-03-13 | 2013-06-25 | Certusview Technologies, Llc | Marking apparatus and marking methods using marking dispenser with machine-readable ID mechanism |
| US8280631B2 (en) | 2008-10-02 | 2012-10-02 | Certusview Technologies, Llc | Methods and apparatus for generating an electronic record of a marking operation based on marking device actuations |
| US8965700B2 (en) * | 2008-10-02 | 2015-02-24 | Certusview Technologies, Llc | Methods and apparatus for generating an electronic record of environmental landmarks based on marking device actuations |
| US7575065B1 (en) | 2008-07-31 | 2009-08-18 | Garrett Electronics, Inc. | Metal detector with excavation tool |
| US8442766B2 (en) | 2008-10-02 | 2013-05-14 | Certusview Technologies, Llc | Marking apparatus having enhanced features for underground facility marking operations, and associated methods and systems |
| CA2739272A1 (en) * | 2008-10-02 | 2010-04-08 | Certusview Technologies, Llc | Methods and apparatus for generating electronic records of locate operations |
| CA2691780C (en) | 2009-02-11 | 2015-09-22 | Certusview Technologies, Llc | Management system, and associated methods and apparatus, for providing automatic assesment of a locate operation |
| CA2771286C (en) * | 2009-08-11 | 2016-08-30 | Certusview Technologies, Llc | Locating equipment communicatively coupled to or equipped with a mobile/portable device |
| EP2467674A1 (en) * | 2009-08-20 | 2012-06-27 | Certusview Technologies, LLC | Methods and marking devices with mechanisms for indicating and/or detecting marking material color |
| CA2710189C (en) * | 2009-08-20 | 2012-05-08 | Certusview Technologies, Llc | Methods and apparatus for assessing marking operations based on acceleration information |
| CA2713282C (en) * | 2009-08-20 | 2013-03-19 | Certusview Technologies, Llc | Marking device with transmitter for triangulating location during marking operations |
| USD643321S1 (en) | 2010-03-01 | 2011-08-16 | Certusview Technologies, Llc | Marking device |
| USD634655S1 (en) | 2010-03-01 | 2011-03-22 | Certusview Technologies, Llc | Handle of a marking device |
| USD634657S1 (en) | 2010-03-01 | 2011-03-22 | Certusview Technologies, Llc | Paint holder of a marking device |
| USD634656S1 (en) | 2010-03-01 | 2011-03-22 | Certusview Technologies, Llc | Shaft of a marking device |
| USD684067S1 (en) | 2012-02-15 | 2013-06-11 | Certusview Technologies, Llc | Modular marking device |
| DE102013102440B3 (en) | 2013-03-12 | 2014-05-15 | Dionex Softron Gmbh | Positioning unit for flow cell for optical detection in HPLC field, has front end facing away from flow cell formed by outer surface of flange of cell, and terminal piece whose front end is connected with light conductor and sample supply |
| DE102013102439B4 (en) | 2013-03-12 | 2021-09-02 | Dionex Softron Gmbh | Process for the production of a fluidic connection component for chromatography |
| DE102013102438B3 (en) * | 2013-03-12 | 2014-03-20 | Dionex Softron Gmbh | Flow cell for measuring e.g. permittivity of sample fluid in HPLC application, has capillary tubes arranged within protective tube to obviate unwanted mechanical application on side of capillary tubes surrounded along longitudinal direction |
| US9347798B1 (en) | 2014-12-24 | 2016-05-24 | Garrett Electronics, Inc. | Metal detector with hermetic housing |
| US10105723B1 (en) | 2016-06-14 | 2018-10-23 | SeeScan, Inc. | Trackable dipole devices, methods, and systems for use with marking paint sticks |
| CN107329178A (en) * | 2017-08-10 | 2017-11-07 | 无锡市日升机械厂 | The alpin-stock of built-in metal detector |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2468125A (en) * | 1943-07-14 | 1949-04-26 | Walter T Silver | Standing wave indicator |
| US3281660A (en) * | 1964-05-28 | 1966-10-25 | David K Studenick | Locator for magnetic and conducting materials including means for adjusting the relative positions of a pair of sensing coils |
| US3643155A (en) * | 1966-07-25 | 1972-02-15 | Micro Magnetic Ind Inc | Flux gate magnetometer including backing plate |
| US3510766A (en) * | 1968-02-01 | 1970-05-05 | Saftematic Inc | Probe device having a pair of aligned tubular sections for detecting electric leakage |
| US3909704A (en) * | 1972-11-03 | 1975-09-30 | Schonstedt Instrument Co | Magnetic locator having sensor units with two-piece housings and tubular cores |
| US3894283A (en) * | 1972-11-03 | 1975-07-08 | Schonstedt Instrument Co | Magnetic locator including sensors mounted in longitudinal grooves of a tubular support |
| US3961245A (en) * | 1974-11-20 | 1976-06-01 | Schonstedt Instrument Company | Magnetic locator having improved sensors |
| US4110689A (en) * | 1975-01-17 | 1978-08-29 | Schonstedt Instrument Company | Magnetic detecting apparatus with novel means for positioning sensor assembly in a housing |
| US4163877A (en) * | 1978-01-11 | 1979-08-07 | Schonstedt Instrument Company | Housing for circuitry and loudspeaker of a magnetic locator shields and resiliently mounts the loudspeaker |
| US4406272A (en) * | 1979-12-20 | 1983-09-27 | Magnavox Government And Industrial Electronics Company | Magnetic sensor for distributorless ignition system and position sensing |
| US4539522A (en) * | 1982-06-23 | 1985-09-03 | Schonstedt Instrument Company | Magnetic detector apparatus with liquid-supported, conductive, sensor-support tube |
| CA1208292A (en) * | 1982-08-27 | 1986-07-22 | Malcolm E. Bell | Magnetometer with precision aligned sensors |
| GB2135460B (en) * | 1983-01-20 | 1987-10-07 | Scopemoor Ltd | Detecting hidden objects |
| CA1244083A (en) * | 1985-07-25 | 1988-11-01 | George Gee | Instrument for sensing ferromagnetic bodies |
| JPH0285324U (en) * | 1988-12-21 | 1990-07-04 | ||
| JPH0719017Y2 (en) * | 1989-03-09 | 1995-05-01 | 株式会社ゼクセル | Magnetoelectric converter |
-
1990
- 1990-05-25 US US07/528,414 patent/US5097211A/en not_active Expired - Lifetime
-
1991
- 1991-05-07 CA CA002041982A patent/CA2041982A1/en not_active Abandoned
- 1991-05-24 JP JP3119696A patent/JPH04231891A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US5097211A (en) | 1992-03-17 |
| JPH04231891A (en) | 1992-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |