US1160986A - Power-transmitting mechanism. - Google Patents

Description

J. KIEWICZ.

POWER TRANSMITTING MECHANISM.

APPLICATION FILED APR.12. l9f5.

Patented Nov. 16, 1915.

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John KIew'Ic g,

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J. KIEWICZ. POWER TRANSMITTING MECHANISM.

APPLICATION FILED APR. I2. I915.

Patented Nov. 16, 1915.

3 SHEETSSHEET 2- J. KIEWICZ.

POWER TRANSMITTING MECHANISM.

APPLICATION FILED APR. 12, 19 15.

Patented Nov. 16, 1915.

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. tion with a buttonhole sewing'machine of y STAT r Enron JOHN. mnwicaor :eosron, MAssacH usErr'rs, assist nt) THE in-Eon BUTTON Hons MACHINE COMPANY, or Bosron, massaonusn'rrs, a CORPORATION or MAINE. .U

' POWER-TRANSMITTING MncHAnIsM.

T 0 all whom it may concern:

Be it known that 1, JOHN Ki:nwioz, a citizen ,of the United States,.-:residing at Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Poit er-Transmitting Mechanism, of which the following description, in connection with the accompanying drawing, is a specification, like characterson the drawing representing like parts. 1 7

This invention relates to power-transmitting mechanism, such as is-usedtotransmit power from a power element to a machine, to be operated, and particularlyato transmitting mechanism adaptedto drive a machine thatis constructed to be moved bodily from. its operative position into an inoperative position, and the object of theinvention is to provide a power-transmitting mechanism so constructed that when the driving connection between the power element and the ma chine is moperative, said machine can be shifted fromits operative to its inoperative position, while when the. machine is in its" operative position, the driving connection, between the driving element and said ma-s started by simplyshifting the belt from a.

loose to a fastpulley. Thisshifting of the I 'belt fromthe fast to the loose pulley and chine can be established;

Inthe illustrated embodimentof myinvention the driving (connection bet'weenwthe power element" and themachine to be operated is in the nature of beltsand pulleys,

from one position to the other.-

, 7 While my invention iscapable'of use lIl. connection with various machines that are constructed to be shifted bodily from one position to another, I have chosen herein to.

illustrate it, as it'would be used inconnec,

the Reece"type, such, for ,instance,'asv-is shown in United States Patents No. 488,028, December 13, 1892, NO."191-,280, March 28,

1898. These sewing machines a are usually pivotally mounted onaframe or base so that they can, be turned about their pivot from their operative f positionto their inoperative position in, which some parts of the, stitcpn using these machines :it isnecessary for the operative to turn the machine bodily about ing' mechanism areeXposed to view.

its pivot at various intervals in orderlto permit him to have access to varlous part'sof the machine that are concealed within the base when theymachine isin operativepositibnn 1 I have provided c ti aieni. PatentedNov.16,1915. 'Application'filedApril 12, 1915. Seria1No.2 0,667. I

The driving mechanism usually employed on machines of this type'is a driving belt passing around a driving pulley secured to the machineand driven from a pulley ona shaft operating about a fixed axis. In. order to permit the machine to be turned from its I operative toit'skinoperative position withv chine orifrom the pulley 0n :the fixed driv ing shaft, andin order to start the machine up again has necessitated replacing the drivlng belt onto the pulley from which it has been removed;

tive position without thenecessit-y, of remov herein beltpowerrtrans Inltlllllg device which permits the machine-to be shifted from its operative to its inoperap belt is operating on the loose pulley and is, i I therefore, inoperative todrive the machine,

the latter can be shifted from its. operative to its inoperative position, and when said machine is-in its operative position it can be In order, togive'an understanding of invention I have illustrated in thedrawi ings a selected embodiment thereof which" will now be described, after which the novel features will be" pointed out in the appended 7 claims.

Inthe drawings, F1gure 1 1s a side view of a sewing machineof the type above referred to having my improved power transmitter appliedthereto and showing theima chine inits operative position; Fig. 2 is a similar view showing the sewing machine raised into'its inoperative position and thetransmitting mechanisminoperative Fig. 3

frame for supportingthe cou'ntershaft; 5 is a section on the line iv-00, Fig. 1.

I have shown at 1 a'machine to be operated which forillustrativepurposes is shown as a buttonhole sewing machine of the socalled Reece type such as described inc'the:

above-mentioned patents/ 1 I tion canvbe. applied to various machines. l

Thesewing machine is shown assiistained one suitable support herein designated as comprising a bench or table 2 carrying a v base frame 3 to which the sewing machine-is 'pivotally'mounted, as at 4, thus-permitting K driven from a belt6,.'said1belt-extending down through thebench oritable 2 and'zbeing' driven from a shaft below theatable.

belt.

; Iftheshaft from which the'transmission the sewing machine, tOpbG raised from its operative positionshown inFig. 1 to its inoperative position shown m Fig. 2. e v

"ThQ'lhilChlllB l isshownas provlded wlth "a driving pulley 5 by "which the stitching mechanism is Z' operated, this pulley being convenience and identification purposes I will refer .to

. belt6 is driven is'mounted infixed bearings it will be evident that inorder' to raise the machine from its operative position 1 shown 1 n Fig; 1' to itSIIlO'QGIEtlZlVG pOSltIOIl shown.

in Fig. 2 will require' that' the belt be disr engaged either from the pulley 5 or from h thepulleyfromfiwhich' the belt '3 is driven; Toiobviate this :difiiculty I: have provided a countershaftbeneath the-table 2 carryinga pulley over which the belt6-runs,ai1d this co'untershaft is' sustained 'for vertical movejment'so vthat it will: rise-and fall-With the, 35,

machine 11 whenthelatter is moved from one positiontothe other; This'counter-j. shafthas a pulley fast thereon and the con-'1; J struction is such that'when the machine is in its operativegposition the I countershaft will be properly positioned to bringthefast pulley thereon in axialfalinement and closely l adjacentjtlo a loose pulley operating'in the 'fiiged bearing and over which a: driving belt passes so that. the driving belt "can be shifted from the loos'eto the "fast pulley and thereby operate the machine. flWhen this driving belt is running on the loose pulley, however,

" "the countershaft-with the fastpulley can'be j p "65 1 215611: a ipowenldpiveliiishaft '13"operatin1g in,

raised with'the' machine 1,. thus obviating the necessity of taking the belt 6 off from one'of the lpulleys over which'it operates.

The pulley whichjidrives the'belt 6is shown at and it is faston a countershaft' Swhich V has" fast thereon a pulley Q9 hereinafter- 'referred to as the fastpulley. This countershaft 8 is sustained in- ;a suitable frame 10 secured to the i table 2 for 77 vertical "movementi so" that as' the machine is shifted from the operative positionjshown in Fig. 1 to its inoperative position shown in' Fig.- 2; the

wish tostatef however, that the machine itselfforms no, part of the inventionand that said inven- For tlie-lbelt6 as the transmission fixed bearings; 14 is a so-called: loose pulley 7 whichis loosely'mounted on a stud shaft carriedbya 'suitable bearing 16' secured to the table 2. V,

' The frame 10 isso mounted and the fast pulley 9, is so positioned thereontha'twhen it occup es the position shown lnF g; 1 and the machine 1 1s in'lts operativeflposltlon, the '7 shaft'S is cor-axial with the'shaft and the loose pulley 9 is closeiyadjacent to the fast pulley 14, as seen in i'gsiB 'and 5. When the parts are inthis'position the driving belt 11 can be readily shifted fromthe loose to the pulley or vice versa inthe same way as if the fast and loose'pulleys were mounted on the same shaft The shifting of the belt 11 from the looseto the fast pul ley will, of course, 'drive'the countershaft 8' thereby driving the pull'eyx5, while the Y shifting to the-=loose oulley will allow the machine to come to rest.

By making the frame 10 movable it will I be carried. into the position shown inzFig; 2

when the machinel is lifted into its inoperative positionifthe'belt-ll1s running on the loose pulleylelj -The frame 1-0 isherein shown as pivotallyiniounted on I the shaft 17 secured in the bracketLlS" fastened tothe table 2,-and said: frame has secured thereto and extending therefrom a strut member 19 which extends up through the table and base frame 3 and the upper end of which occur pies asocket 20 formed on the undersideofthe machine The frame 10 acted upon by suitable spring mechanism *whichyieldingly holds thestrut member 19 in its socket.

This spring mechanism is herein shown as V constituted by two springs .21, each of which is wound ,about the hub port onf22 of the r 105 frame'10 and atone end is secured to a collar 23, the other'end 24 of whichis extended The 7 iindervthe yoke portion oftheframe, tendency ofthesprings 21, therefore, is to lift the frame and thereby keep the strut 19 in the socket 20. iThei-collars 23=are shown as loosely mountedon the shaft 17,

and each collar'is provided with a stop pin 25- engaging the-shoulder 26 formed on the" bracket 17 which holds the collar from. ro.

tation. This pin 25'can be adjusted-into any one'of several apertures- 28 formed in the collar, thereby to adjust" the tension ofthe spring. Withgthis "construction the shifting offlthe machine 1 frornj'itslopenative to its inoperative position and vice ;vers aresults in a corresponding movement Y of thefraine10 and as stated above,v the:

parts are; so proportioned and constructed. that when the machine is in its operative position the frame 10 will be'lowered into a position to bringthe sha'ftS co-axia'l with 1 thefshaft-15, as shown in Fig. ,1. The shifting of thepower belt 11. fromthe fastpulley'lc to the loosepulley 9 isherein so' provided for by means of a belt shifter 30 i;ieo,'9se

which is operated ha s treadle31 pivoted at 32 toa suitable bracket33.'"The construe-j tlon herein illustratedis suchthat swinging-f movement of the treadle inone direction, as,

for instance, that which will resultfin the" pressure of the toe of the operative on the left-hand end of the treadle, Figs. 1 and '2;

will operate the beltshifter to shiftthe belt from the loose to the fast pulley, while movement of the treadle in the oppositedi rection into the position shown in Fig. 2, whichcan be accomplished by a pressure of the heel of the operative on the right-hand edge of they treadle, will operate the belt shifter to shift the belt fromthe fast to the loose pulley. Any suitable mechanism for connecting the treadl'el to" thebelt shifter may be employed. As 'hereinyishown, the

, beltshifter 30s is carried by a sleeve 3-1 slid-' ablymounted on the shaft l'SQandthissIee Ve is pivot-ally connected at to one arm of an elbow-lever 36 that ispivoted at37 to the bracket 16. Said'elbowlever is connected to the treadle by a link or connection 38, With this construction the movements of the] treadle above described will shift the power belt 11 from the loose to thefast pulley and vice versa. Thebelt-shifting mechanism is provided with means for yieldingly holding a it in either of its two positionsjand the conr struction herein illustrated for this 1 comprises a frictional locking pin 39 slidab'lyj mounted in the boss 40 carried'by 'the'lever 36 and backed by a spring; 11, said pin being adapted to' engage in either one of 7 two notches 42 or -13 formed in the bracket 16. This provides a frictional lock for frictionally and yieldingly holding the leverfl36 in. either of its two positions.

' I type.

When the operative wishes to raise the machine 1, he will simply operate the treadle I 31 to shift the power ,beltll from the fast to the loose pulley, and when this isdonethe machine is freetorbe raised into itsinoperative position w thout removing the belt 6 y from either of th 'pulleysover whi h i traverses; a k

he machine extending from the base 3 thereby to support the machine in its'elevat-ed position.

The supporting arm 44 is provided with a handle 47 by which it may befoperated to withdraw it from the pin 416 when the machine is to be lowered. It is sometimes dey 1 is herein shown as having a a supporting arm's 1 i pivoted thereto at 15, and adapted to rest ona supporting pin' lto sirable to swing the machine 1 farther back about itspivot than shown in Fig. 2, and'if this is done the socket 20 will be withdrawn from'the end of the strut 19.

have provided herein a construction which will maintain the strut 19 in proper position so that if the machine is swung farenough' back to disengage it entirely from thestrut, said strut will bemaintained in a positlon to enterthe sockets 20 againwhen themachine is brought back into the posi tionvshown in Fig, 2. The strut 19 is shown as passing up through a guiding slot 19 formed, in the guide plate 50 secured to the bench or table 2, and theframe 10, is proagainst theendof the slot, thus maintaining the strut in position to enter the socket 20when the machine is brought back into the position shown in lFig. 2, after having been swung farther back aboutits pivot 1. The slot 49 is necessary to accommodate the lateral movement of the strut as the machine I 1 moves from the position shown in Fig, l to that shown in Fig. 2.

A buttonhole sewing machine of the Reece type such as illustrated in United States Patents No. 188,028, and No. 494,280

'is provided with an additional driving pulley 54 driven'by a belt 55 separate'from the transmission belt h, this pulleyhi controlling the feed mechanism, while thefpulley 5 drivesthe stitch=forming mechanism. Where my invention is used in connection with 'a i r a '80 vldfied h it prmgor IGSlllIli? member 51 whlclrengages the strut 19 and holds'it' sewing machine of this type I will provide the countershaft 8 with another pulley 56 overwhich the belt 55 passes, said belt 55 being shown as a crossed belt to give'the proper direction of rotation to the pulley .51. The presence of two pulleys on the countershaft 8 is, however, essential only where the machine to be operated requires'two separate transmission belts for its operation.

VVhenthe machine 1 is moved into its inoperative position there may be more or less vio a slackness in the transmission belt orbelts, and t'ohold each transmission belt in proper 7 position relative to its pulley so that it will H automatically come "back onto the pulley again when the machine is moved intofits operative position and the countershaft 8 has been carried into the position shown in Fig. 1', I propose toprovide belt, guides 60 I which are associated with the pulleyson the shaft 8. Theseh'elt guides insure that the belts will be brought back onto the pulleys v whenthe countershaft; 8 is lowered.

While I have illustrated. the invention as it might be applied in operating a button hole sewing machineof the Preecei type, yet

1 wish it distinctly, understood that so far as the invention itselfis concerned, it is' capable ofuse for dr1v1ng any IHZtChIHQ whichisconstructed so as to be moved from

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