US143766A - Improvement in sewing-machines - Google Patents

Description

` ZSheets--SbeetL G. W. HUNTEB. Sewing-Machines.

NG. 43,76. Patented Oct. 21,1873..

' that operates the sluttle-carricr, and the cam side elevation ot' the operative parts, the franze cam, 13', is also t'ormcd upon this main' shat't,

UNITED STATES PATENT OFFICE.

`GEORGE IIUXTER, OF \VASHINGTON, DISTRICT OF COLUMBIA, ASSIGXOR OF PART OF IIIS BIGIIT TO XVM.

F. STOXE, llENRY- M. BAKER, AXD

JAMES Il. YERMILYE, OF SAME PLACE. w

IMPRVEMENT IN SEWlNG-MACHINES.

Specification forming part of Letters Patent No. 143.766, dated October 21, 1873; application filed June 7, 1873.

Be it known that I, GEO. IIUNTER, of the city ot' \\'ashington, District ot' Columbia, have invented a new and nset'ul I nprovement in Sewing-Machiues, ot' which the following is a speciticntion:

My invcntion consists of an im]rovementin the node ofoperatingany ordinary tbur-motion feed, the parts intermediate between the operation-surtace and the driving-shat't being so constructed and arran ged,substantially as hereinaftcr described, that a single adjustment will regulate the length and the rise ot' the feed simultaneously. It consists, also, of an improved mode of connecting the vibrating arm that operates the feed, with the driving-shat't, through the medium of an angnlarly-borcd cylindrical slccve, whcreby great t'acility in the asscmbling of the parts and great cheapness and simplicityare securcd. lt consists, finally, in a special arragement ot' the necdle-bar and the cam by means of which the power ot' the driving-shat't is appliedthereto.

In the accompanying drawings,Figure lisa.

being shown in sections. Fig. 2 is a top View of the bent or crank shaftand slceve or soeket ot' the Tihrating arm which opcratcs the shuttle-carrier, the t'rame being cnt horizontally. Fig. 3 is an inside plan ot' the face-plate, showing the needle-bar, its cam, and the presscrfoot, and in position. Fig. 4 is an elevation of the driving-shat't, in which the inclined bearing 'or the Yibrating arm that. opcrates the shuttle-carrer, as well as the cam that operates the feed meehanism, is t'urnished by means ot' an an gularl y-bored slcere properl y securcd to the straight shat't. 1 `ig. 5 is a longitudinal seetion ot' the shat't thus construeted.

-let'erring to the figures ot' the drawings, A

represents the main driving-shat't ot' the machine, which, in the form shown in Fig. 1, is cast with an inclined section, upon which is adjnstcd the head ol' the \'il.rating arm l. A

this cam serving, in the manner he'eiat'tc' explained, to connmncate the reqn'ste motion to the feed. The end of the main or driving shaft is provided with a erank-pin, as shown in Fig. 1, for Operating the needle-bar.

is the vihrating arm which operates the shuttle -carrier, this vihrating` arm being secured to the i nclined part of the main or driving shat't hy means ot' a sleeve or socket cast in two parts, B and B The joint between these two parts ot' the slecre is made on a horizontal plane, both t'or convenienee of manufactur'e, and, also, so that the parts maybe gronnd down to compensate for the wear ot' the parts, which takes place mainly in a vertical direction, or at the top and bottom of the sleeve. These two sections ot' the sleeve are 'astened together hy means of screws passing through the lngs cast upon the sections for 'this purpose. The upper section, B', ot' the socket is provided witl a cup or rccess, I, through which ahole leads to the shat't, and by means ot' which the hearing is conveniently luhricated through a pert'oration in the top ot' the t''ame leading thereto.

The shuttle-carricr is operated through the medium ot' the vibrating arm 13 as in my patcnt hearing date September 3, 1872.

The t'ced mechanism. consists ot' thecan B upon the driving-shaft; the feed-level' I, to the outerend ot' which the rouglened surtce feed or dog (not shown in the drawings) is attached; the movhle t'nlcrun K, upon which this feedlever is supported; a eonne.-ting-rod, which is forked at its uppcr end to emhrace the can B and which, at its lower end, is attached to the inner end ot' the t'ced-lever; the bar O, through which the connccting-rod passes, ?na? which serves as a t'nlcrum for such conneeting-rod; and the spring S, which rests upon the har O, and serves to maintain the. contact of the t'orkcd head ot' tl e connecting-rod with the cam upon thc dririig-shat't.

'The feed-dog may he connected with the Iever l in any suitable manner. -I prefer, however, to use a har placed at right; angles with the levcr l, one end of such bar being connected with the oute: end ot said levcr, and the other end ot' it upported in a loop or way, in or ou which it may lay trans versely ot' the bed-plate ot' the machine. In this way the roughened surface or dog, which is attaehed to the upper side or edge ot' this bar, is made to partake ot' the vertical and transvcrse.movement ot' the outer end ot' the lever I, and thcrehy feed the goods with which it comes in contact.

Insteadof the forked head of' the connectingrod, held in contact with the cam by means ot' a spring, as shown in Fig. 1, this rod ight be provided with ayoke that would entirely embrace the cam, in which case the spring' could be dispesed with. I prefer, however, to use the Construction shown in Fig. 1, as the parts worl more smoothly and with less noise.

The base or bed plate of the machine is provided with a straight lon gitudinal slot, through which passes the shani; ofa tlunb-serew,wlch

enters themovable fnlerun K. l v means of this screw themovablefnlcrnmma y be adinsted at any desircd position alone; the entire length of 'the slot. Itis plain to see that, according.:- as the fulcrnm is placed nearer to the point ot' connection of the feed-lover with the connecting-red, both the length and the rise ot' the feed will be inercased thereby, and vice versa.

G Gr represent the face-place, in which the needle-bar C and presser-t',ot stock are adjusted. This plate is provided with a groove, I?, in which a guide, F, of the cam li works. The cam E and its guide may be made in one piece, if desired. Said cam may be connected to the needle-bar in any suitable manner; but in all cases, aceordin to my present invention, it should be connected at ornear the end nearest the operator, by which arrang'ement the downward stroke of the needle-bar is facilitated, inasmuch as the power of the drivingshaft is thrown upon the needle-har above the line of its axis at the very time when it is neeessary that this bar should move with the least friction, viz., at the tine when the needle is justentering the goods. From this arrangementof the needle-bar relatively to the slotted cam and the orank-pin, whereby the needlebar is placed near the edge of the face-plate which is next to the operator, it follows that the thread may be brought down squarely from the tension device to the eye ot' the needle in front of the operator without:- tnrning a corner, as is the case in other,transverse-shnttle machines. i

As shown in l' ig's. 1 and 3, the driving-shat't is cast in one piece, the inclined section and the cam being eontinuons with the plain portions thercof. The prefer'cd mode of eonstrnction is to make this shat't c vlindrieal through' ont, as shown in Figs. 4 and 5, and then, b v

means ot' a screw, key-spline, or by any other usnal device adapted theret'or, secure to it an angularly bored evlindrical sleeve, L, provided with a cam for operating the feed, and with the requisite collars for gniding the movement ot' the arm that operatcs the shnttle-carrier. The object ot' this mode of eonstruction is convenience and economy ot' manufacture. By means ot' it, itno longer becomes necessary (as where. the shat't and sleeve are made in one part) to make .the t'i-ame in sections in order to efl'ect the asscmbling ot' the parts. The t'rame may now be cast in one piece, and the vibrating arm IF titted together and inserted in position through thc opening in the bottom ot' the t''ame, and then the nain operatingshat't A may be passed through the outside ot' the t'rame, and through the eylinder L, after which said evlinder is secnred tothc shat't, as above described. ly this Construction, too, the angularly-lored sleeve and the vibrating arm ll ma v,'it' desired, be made in one piece.

\\'hat I claim is the tollowing:

1. The combination ot' the cam upon the drivingshatt, the forkcd connecting-rod, provided with its spring and fixed t'nlcrnm, and the feed-lover, provided with its adinstable fulcrum, substantially as and t'or the purpose set forth. V

2. The combination of the straight driving'- shat't A, the vibrating arm 13 and the augularly-bored cvlindrical' sleeve L with its attached cam 13', for Operating the shnttle and the connecting-rod of the feed meehanism, substatially as shown and described.

3. The combination ot' the needle-bar, the

slotted cam, and cam-guide, when arrang'ed substantiallv as shown and described, so that the needle-bar maybe eauscd to move near that side of the needle-head which is next to the operator. v

GEO. IIUXTER.-

VVtnesses:

JAS. H. VERJHLYE, Cm P. REDDEN.

Images