US36617A - Improvement in sewing-machines - Google Patents

Description

2 Sheet heet 1' D. W. REY,

SEWING MAG E I No. 36,617. Patented 0m. 7, 1862.

V Z. v fizz/6n 0% 2 Sheets-Sheet 2.

D. W. G. HUMPHREY SEWING MACHINE.

No. 36,617. Patented Oct, '7, 1862.

UNITED STAT S PATENT OFFICE.

'lMPROVEMENT IN SEWING-MACHINES- Specification forming part of Letters Patent No. 36,6l7, dated October 7, 1862.

To all whom it may concern:

Be. it known that I, D. W. G. HUMPHREY, of

Chelsea, in the county of Suffolk and State of same, reference being bad to the annexed drawings, making a part of this specification, in Wilsch-- Figure 1 is a perspective view with the side of the arm removed for the purpose of showing the internal arrangement of the parts. Fig. 2 shows the opposite sides of the part removed from the arm with the tension arrangement attacll'ecl. Fig. 3is a perspective view of the under side of the table.- Figs. 4, 5, and 6 show how the threads are interlooped to form the stitch. Fig. 7 isa section of the table with the plate V and the cam-wheel W, Fig. 8, removed. Fig. 8 shows the upper face of the cam-wheel 'W and groove by which the teedclamp is moved. Fig. 9 shows the under face [of the cain wheel W and groove which operates rocker X. Fig. 10 is a section of the feed mechanism. Fi 11 is an under side view of thc'feedclamp K Fig. 12 is a view of the apper side of feed-clamp K A, Fig. 1, is the table; B, the arm; 0, the needle-bar carrier; D, the needle-bar, and E a horizontal shaft, on which is the balancewheel F and the crank-wheel G, which drives to the needle-bar carrier 0 a lateral motion, by

which the needle a'is carried alternately through and over the edgeot'the material worked upon. I is a slottedcam attached to,the needle-bar.

In this cam a pin on the face ofthe cam-wheel' G works, thus giving the needle-bar the proper.

vertical motion. .0 is a thread-guide attached I to cam 1. K is the clamp-presser. h is'a latch by which the clamp-Presser is raised. c, Fig. 2,isathread-guide and tension, through the upper eye of which. passes the thread from v the spool d", thence around the wire according to the tension required, and through-the lower eye, thence through the eye ofthe threadclamp e, hereinafter described, through the eye of the thread-guide 0', then through the eye in the lower end of the needle-bar, and through the eye of the needle a. f on theinner sideof Fig. 2 is a. spring which holds the thread-clamp c. When the plate shown in Fig. 2 is screwed onto the arm in its place the point of the threadclamp at e is intermittently operated upon to relieve the thread by cam g, attached to hub of bevel-gear on shaft'H. The thread-clampe is a hollow screw with a piston working within it. The screw is turned by a wrench into the side of the arm, as shown in the plate at the right, Fig. 2. *On the outward end of the piston is a shoulder which, to clamp the thread, is drawn against the face of the screw by the spring f, attached near to the end of the piston, which is operated upon by cam g, as described. The eye at the'c'lamp through which the thread passes is through the piston close motion The points m and it work alternately and enterthe loops from opposite directions.

It is held in its place by the cap hf. over which it slides, having a lateral motion produced y the slot S working on the pin 'r,Fig. 4. M,

Fig. 3, is a. bar carrying the lower needle, I), forv the binding-thread, and receives motion from a cam on shaft H. N is a bar carrying hook c for spreading the loop of the binding-thread; It also operates the loop-check i, Fig. 4,-a-nd receives motion from cam on shaft B. M and N are connected to cap R by the sweeps jand Z,Fig. 5, which give the needle and hook a.

the eye of the needle 11, thence up through the plate V. 1 7

F1 g. 4 represents the stitch produced by the mechanism" herein described, and, together with Figs. 5 and 6, shows the operation of the parts in producing it. Fig. 4, needle a carries.

a loop of the finishing-thread through the cloth, which loop is entered bythe point it of the loop-carrier. (t then retreats, leaving its loop on point a, Fig. 5. The loop-carrier moves farther forward, and at the same time laterally far enough to receive the needle a as 1t'de-.

scends over the edge of the cloth and through the loop on point a at z. The loop-checki holds the loop in a position to insure the passage of needle a through it. As soon as needie a carries a loop over the edge of the cloth and through the-next preceding loop, which was carried through the cloth, the loop-check z and the loop-carrier d retreat, leaving the loop carried through the cloth over needle a, and tree to be drawn up at the next descent of the needle. The needle a then continues its descent over the edge, forming another loop,

which is entered by the point m of loop-carrier, Fig. 6. The needle I), Fig. 4; then passes a looplof the binding-thread through the overedge loop, point m and needle a. then retreat, leaving a loop of the finishing-thread over needle 1;. Hook 0 seizes the loop of the bindingthread and holds it open until needle a carries another loop throughthe cloth and enters its point into this loop of the binding-thread,when the needle I) withdraws from the over-edge loop and at the same time the hook Q releases its'hold upon the binding-thread, leaving its- .piece U hinged to it. Through these the cam Q moves the cam-wheel, Fi 8, coming in con- Iactwith it through the slot 2 Fig. 7. After the sliding piece U, Fig. 10, which is held against the cam-wheel by a spring around the standard, which connects it to lever T, has moved the canrwheel forward, the noise which would be occasioned by allowing it to come in contact with the teeth ot'cam-wheel while moving back is prevented by the loop-carrier d, Fig. 5, which moves it away from the teeth, and against the end of which it slides back to its place. Fulcrum of lever T is at 8 e is a spring which keeps the end of level forward thatit may come in contact with cam Q. This cam works against lever T at point y". 'Z. Fig. 3., isa screw for regulating the feed. When feeding-the rounded part of the button-hole the cam-wheel must move faster than when feeding the straight parts of it, else the stitches will he too much crowded'in the rounded part. The necessary change of feed is produced as follows: Y Fig. 3, is an adjustable plate at;

.tached to lever T, and'is fastened to the lever by screws through slots,'thatit may be moved farther from or nearer to cam Q, by which the feed of the rounded. part may be regulated. Through Y-the piston e works. YVhile feeding the rounded part of the piston e is dropped down forward of 3 coining nearer to cam Q and in contact withit, thus givingmore vibration to lever T. Piston e is raised and de-' pressed by the arm of rocker X. Rocker Xis operated upon by the groove'in the under side of cam-wheel, Fig. 9. Whe'n stitching the straight part of the button-hole point to of rocker, Fig. 10, rests in the groove on the under side of cam-wheel. \Yhen stitching the rounded part it is raised to the surface, thus raising and depressing piston e at the proper time to effect the changes of feed. Spring'r keeps rocker X in contact with the cam-wheel. Arm of rocker Xshould be made of thin plate or with a joint in it, that it may yield to the vibration of lever T. Handle W on the endaot' lever T is for the purpose of operating the feed without moving any other partot' the machine.

Fig. 7, l is the recess of the table A in which the cam-wheel W works around the col. lar q as its axis. f f are pawls. .2 is a slot through which the slide U moves the camwheel. When the cam-wheelis placed into the recess and in proper position to commence work that point of its groove marked m should rest directly under point n of Plate V, Fig. 1..

Fig. 11 is the under side of the feed-clamp. The use of this clamp is to hold the cloth or other materialto be stitched. By clamping two or more thicknesses in thisway their edges are held even and smooth through the process of feeding; neither side of the cloths being directly acted upon by feed or friction to draw or displace them. The inner or holding surfaces or the clamp may be rough or smooth, as the material worked upon may require.

Fig. 12 is an upper view of the feed-clamp. The upper and lower plates are held in their relative position by the arms of the upperplate fitted to the'slots in the standards 25 of the under plate. as is a spring riveted at the middle to the upper plate. its ends bend downward and rest upon the lower plate, thus rais- "ing the end of the plate to which it isattached and making a. stronger pressure on the cloth when the plates are pressed together by the "'leverp c is a slot through the clampand I through which the needle works. This slot should belong enough for the longest buttonhole, and its width in .,the lower plate should The rim e on the upper plate, when feeding,

through the round part of the button-hole. comes in contact with the presser-wheel, which keeps the edge of thelow'er plate closeto the circular projection d. This rim is notnecessary in working a straight button-hole, in which I case the slot 0 should not he. enlargedatthe end. To place the clamp on the machine in position to commence work, raise the needle to its highest point also raisethe clamp-presser. Then place the clamp under, so that slot 0 shall rest over the circular projection d, and that the pin a on the under side of theclamp shall drop through the slot in plate V at point a" and into the groove of the cam-wheel at W. As

' thecam-wheel is moved forward theclamp,

guided by the-slot in plate V, is fedalon g in a, straight line while one side of the button-hole is being stitched. As thepin a of clampenters the circular part of theslotin plate Vit reaches that point of the groove in the cam-wheel nearest to its center and there rests until the wheel has fed it through the circular part of the slot while the rounded part of the button-hole is being stitched. \Vhile the pin a. is passing through the'circular part of the slotit is moved forwardinjcontact with a point on slide k of cam-wheel and at the point where it enters the other straight part of the slot there is a recess in the collar q, Fig. 7, aroundwhich the camwheel works. Into this recessthe'end of slide it is pressed by the pin a, leaving the groove open until .the slide It has passed'. forward of pin a. The cam-wheel then carries the pin a through they other straight part of slot in plate V while the other sile of the button-hole is being stitched. The feed-clamp may then be removed, "leaving the cam-wheel in the same position as at the beginning. To make ashorter button-hole. than would be made by starting the pin at point m. as described, feed the clamp along byoperating withthehand the lever T at W until that pointeis bro'ughtunder the needle where it is desirable to commence.

What 1 claim as my invention, and desire to secure by Letters Patent, is-- 1 The needle-bar carrier 0, operated as described, whereby a regular lateral motion is imparted to needle a, carrying it alternately through and over the edge of the material worked upon to form an edge-finish or buttonhole stitch.

2. The combination of the needle-bar carrier 0, the loop-carrierd, needle b,hook c, and-loop check '5 with needle 11., arranged and operated as described, whereby the button-hole stitch represented is produced.

. 3. The cam-wheel W, employed to feed the material to be stitched, when such material is held and directed by or acted upon through plates, clamps, or their equivalents, the said cam-wheel being moved by any suitable mechanism.

4. The slotted plate V. 'for the purpose of giving direction tothefeed-clamp in stitching any iornrot' but on-hole, in combination with the cam-wheel W for the purpose of moving the said feed-clamp, both arranged and operating substantially as specified.

. .5. Thefeed-clamp K, constructed substantially as described, for the purpose of .holding the material to he worked upon while it is being fed and directed by the cam-wheel W9, in combination with the slotted plateV, or by any other suitable mechanism.

' 6. Theenipl -iyment of the rocker X, piston 6 adjustable-plate Y and spring r, in combination with the lever T, operated as and for the purpose specified.

n. W. e. HUMPHREY.

Witnesses: v

ALFRED R. STANLEY, SAMUEL ()RGUT.

Images