US192008A - William eandel - Google Patents

Description

a To all whom it may concern:

UNITE -1 WILLIAM: RAn DnL, on TnoY, nnw YonK, ASSIGNOB on onnnritn on a 111s RIGHT, TO JOHN GIPPERLEY, JOHN o. oonnann THEODORE I A N a E; nasnntrnastr, onsAMn PLACE.

lMPROV E MEtl TflN BUT-:TONH0LE"ATTACHMENTS,FOR SEWING-MACHINES. I

Specification forming part of Letters: Patent No. 192,008, dated llnnelz, 1877; application filed "January 2, 1877.

Be it known that I, WILLIAM RANDEL, of Troy, in the county of Rensselaer and State of New York, have invented a new and useful ButtonHoleAttaehment for Sewing-Machines, of which the following is a full and exact description, reference being had to the accompanying drawings, making a part of this specificatiomin which a Figure 1 is a plan' view, Fig.2 a front elevation, Fig. 3 a plan view of part of the bottom plate, havinga portion of it removed to show the 'moving mechanism "Figs. 4 and 5,

plan views of the under sideof the vibrating arm containing the feeding device; and Fig. 6 an enlarged and detached view of the reversible feed-motion.

The object of my invention is to produce a button-hole attachment that can be applied to any ordinary sewing-machine, by means of which the button-hole will be perfectly stitched on each of its edges, the material being carried 7 to the needle by means of an automatic feed ing device, that can be adjusted to suit the character of the work upon which the buttonholes are made; i A y As shown in the drawings, A is the bottom plate, to which the several principal parts'of my invention are connected, and which is'intended to be substituted for the ordinary clothplate of some kinds of sewing-machines,while in others it can be attached directly to the bed of the machine, the mode of attachment being dependent upon the style of machine upon which it is used. B is a bent vibrating arm, pivoted to the plate A bymeans of the screw 11!. 'Itsrecessed arm'B is made hollow on its under side, for the purpose of containing the feedin g device 5 C, a shit'tin g guide-bar, placed within the rccesseda'rm B, and provided witha groove, 0 and a cross-bar, 0 the latter passing through openings formed in the sides of the recessed arm, maintaining the guide-bar O in perfect line during its changes of position, as hereinafter described. One of the arms of the cross-bar c 'is provided with a notch, into which the pawl D engages. This pawl is pivoted to the vibrating arm by the ing arm by the stud 7L sprin'gI, which engages in the cross-bar 0 low it to vibrate thereon.

ably make with its back edge formed into an studs 61, and is held in the notch of the cross bar a by the springd A rod, E, is attached to the pawl D, and is provided with a stop, F, having an arm, f, projecting sidewise therefrom, and which is secured to and rendered adjustable upon its rod by means of the setscrew G,the head of which projects beyond the side of the vibratingarm. A cross-pin, e, inserted inthe rod E, serves as a check to prevent the pawl D from being raised too far. The outer end of the cross-bar c is cut away, so as topresent a beveled surface, against which, the spiral face h of the lever H bears, for the purpose of moving the guide-bar O inward. The lever H is pivoted to the vibrat- By means of the of the slide exposed to receive the pressure of thefriction-spring K, which is secured to the cross-bar c by the screw 70, the function of which will be hereinafter described. The feeding device is connectedto the clamp-plate by means of the rack L, which is pivoted to the end of the slide j by the stud Z, so as to al- This rack I preferobtuse knife-edge, and for the purpose of holding it (the rack) in gear with its pinion, and to allow the pivoted end of the rack to change its position as required, I place a bearingpiece, M, with a pointed end, m, made to'iit the back OflthG rack, arranged directly oppo site the center of the pinion of the feeding device. By this means a vibrating movement is afforded to the rack Lwithout any danger 0 is a ratchet-wheel, secured to the spindle a. P is an arm, having an .eye or hub surrouiidin g the spindle u, but unconnected therewith, so that either may be moved independently of the other. Q, is another arm, placed between the pinion N and arm P. It has an elongated eye, through which the spindle a passes, so as to allow of the eye being shifted sidewise, in the manner hereinafterset forth.

ing side of the eyeof the arm Q in such manner that as theguide-bar is moved a corre spondi'ng'movement of the eye of the arm Q occurs. This, as will readily be seen, forces the double pawl B into position, so that its proper point will bebrough-t into contact with the teeth of the ratchet-wheel O. T is a slotted arm, pivoted to,the arm 13 by the stud t. 1t

has an opening, t which engages upon the stud plot the arm P, for the purpose ofcommunicating motion to the feeding device, in the manner hereinafter described. U is abrake lever, pivoted to the arm B by the stud u,

and so arranged that, upon the completion of the button-hole, the hub of the rack L is broughtzinto contact with the beveled end of the lever, thereby causing a pin in the other end of the lever to press against the side of the eye of the arm Q, forcing the double pawl into a neutral position, as shown in Fig. 5, sov

that neither point ofit will engage in the teeth of the ratchet-wheel, and entirely stopping the operation of the feed. V is a sliding stoppiece, having a handle, '0, for operating it, projecting from the arm B .By means of this stop-piece, as indicated by the dotted lines in Fig. 5, the double pawl B may be thrown into its neutral position at any moment, and the feed mechanism thereby stopped. When in this position, the slide j may be moved in either direction by turning the pinion N-by means of the head 0?. The clamping device consists of the elamp'plate J, having .an arm,

W, provided with a socket, 10 carrying a spring presser-foot, 20 having an open frame, 20, provided with teeth on its under side, and fitting into an opening formed in the clamp.- plate. The material to be operated on is inserted in the clamping device by raising the presser-foot, and passing the goods between it and the clamp-plate. \Vhen arranged in proper position the presser-foot firmly clamps the material, and retains it until it is removed therefrom.

It is obvious that the operation of my presser-foot differs materiallyfrom the presser-foot commonly used upon sewing-machines, for the reason that in my device it holds the material securely, and carries it during all its changes .cated to the arm P of the feeding device.

of direction, while the ordinary presser-foot, which simply holds the materialon the ma-v chine in proper condition to be acted upon by the feedand for the action of the needle, permits the material to move under it.

X is a cam, secured to the shaft w, and provided with suitable grooves, for imparting motion to the arm Y, which is pivoted by the stud y to the underside of the plate A, a portion of which, in Fig. 3 of the drawing, is broken away to show the parts X and Y. The arm Y has a slotted opening, 3 for the purpose of receiving and adjusting the screw stud b which is secured thereto, and passes through the slotted opening b of the vibrating arm B,

thereby forming a connection between the two arms, so that the motion of the arm T is trans mitted thereby to the arm B. Z is an adj ustin gscrew, fixed to the bottom plate A, for adjusting i the position of the sliding'block z in the slotted dopeningof the'bottom plate, so as to regulate the stitch to be made. provided with a pivoted stud, 2 with which the slot of the. arm T engages, the relativeposition ofthe arm to the stud being indicated by the dotted lines on Fig. 3.

The operation of my invention is as follows p The sliding block 2, is

The material being clamped in the proper p0 sition in the clamping device, and the requisite motion being given to the cam X, (which should be secured to the driving-shaft of the sewing-machine which imparts a vibratory motion to thearms Y and B ment of the arm B the pivoted end of the arm T is carried back and forth with it the stud Bythe movez acting as a pivotal point, gives to the arm T an .oscillatory motion, which is communiy moving the guide-bar C, by means of the lever H, into the position shown in Fig. 4 of the drawings, one of the springs S forces the eye of the arm Q in the direction the guide-bar is moved. This causes the arm Q to turn upon its pivot q, whereby the position of the double pawl is changed so as to bring one of its points to engage with the teeth of the ratchet-Wheel 50, as shown in Fig. 4. By the continued vibrations of the arm 1, by the means before stated, an intermittent motion is imparted to the pinion N, which is communicated to the clamping device through the rack L and its attached parts; thereby the feeding of the material to the action of the needle of the sewin g-machine in the proper direction is ett'ected. The pressure of the friction-spring K upon the slide jprevents the pawl R from giving a retrograde motion to the ratchet-wheel 0 during the return-strokes of the pawl, the springs S yielding sufficiently at such times to allow the I point of the pawl to passfreely backward over thepoints of the teeth of the ratchet-wheel. When the stitching is completed on one side of the button-hole, one of the ears j, by engaging with-the arm f of the stop F, secured to the rod E, carries the pawl I) out of its notch in the cross-bar c whereupon the spring I forces the gnidebar O into the position V l92,008 a 3 shown in Fig. 5, shifting the position of the clamping device'sidewise, so as to bring the unfinishedfside of the button-hole under the line of thej'needle, at the same time the arm Q and pawl R are forced by one of the springs S into the position shown in Fig. 6, by which the direction of the feed is changed, and the material is fed so as to stitch the other side of the button-holeuntil the hub of the rack L strikes the beveled end of the brake-lever U and forces the pawl B into its neutral posi tion, as hereinbefore described,thereby throwand at adistance from its edges, which distance may be varied by adjusting the position of the studs b in the slotof the arm Y,whereby the movement of the arm B can be increased or diminished.

I claim as my invention a 1. A sewingmachine button hole attachment, consisting of a vibrating arm, B,provided with the button-hole clamp, and with automatic reversible feeding mechanism, and with automaliclaterally-shifting mechanisnnwhere by the forward'feed on one side, the switching over to the other side, and the reverse feed on the other side of the button-hole is effected by the vibrations of said arm B, as setv forth.

2. The combination of the plate A, provided with a stud, 2 with the vibrating arm B and slotted arm T, for the purpose of imparting motion to the feeding device, in the manner herein specified.

3. The combination of the guide-bar 0, pro vided with the cross-bar c spring-pawl D, and

lever H, with the clamping device herein described, for the purpose set forth.

4. The feeding device herein described, consisting of the combination of the rack L, pin- .-ion'N, ratch'et wheel 0, arms P and Q, double pawl B, and springs S, as and for the purpose '5. The combination of the guide-bar O, slide 9" provided with projections j with the springpawl D, rod E, adjustable stop F, and spring I, as and for the purpose herein specified.

6. The combination, with the adjustingscrew Z, of the sliding block 2, held laterally in afixed position in the bottom plate A, stud 2 and slotted arm '1, as and for the purpose set forth. i

7. Theco'mbination, with the slide j and brake-lever U, of the arm Qand pawl It, as and for the purpose specified. f V 8."lhe combination of the sliding clampplate with mechanism, substantiallyas described, for automatically changing the position of said clamp laterally, and mechanism, substantially as described, for automatically reversing the motion of saidclamp laterally,

whereby the material is so fed with. relation to the needle that the'buttonhole is stitched on both sides, as set forth.

WILLIAM RANDEL.

Witnesses:

HARVEY H.-SWAIN, JAMES A. CARR.

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