USRE10067E - Cutting and trimming attachment for sewing-machines - Google Patents

Description

S. W. SHOREYQ .Assignor, by means assignments, to Wmcox @GIBBS Snwme'llmnmn 091mm and NATIONAL Snwme MAcH'mn Comma, Limited.

CUTTING AND TRIMMING ATTACHMENT. FOR SEWING MAcHIN-Bs. No. 10,067. Reissued Mar. 28; 1882.1

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SAMUEL W. SHOREY,.OF BOSTON, MASSACHUSETTS, AssIGNoE, BY MESNE ASSIGNMENTS, To WILLCOX & IBBS SEWING MACHINE COMPANY, OF NEW YORK, N. Y., AND NATIONAL SEWING MACHINE COMPANY, (LIMITED,) OF PHILADELPHIA, PENNSYLVANIA.

CUTTING AND TRIMMING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Reissned Letters Patent No.'10,067, dated March 28, 1882. Original No. 148,705, dated March 17, 1874. Application for reissue filed February 8, 1882.

To all whom itmay concern: The drawingsrepresent a machine embody- Be it known that I, SAMUEL W. SHOREY, a ing my invention. citizen of the United States, and a resident of Figure 1 shows the machine in front view. Boston, Massachusetts, have invented a 'cer- Fig. 2 is a side elevatioh of-it. Fig. 3 is a plan 5 min Improvement in Cutting and Trimming of the work-supporting plate and feed-bar,-a'nd Attachments for Sewing-Machines, of which of the cutter and adjacent parts. Fig. ashows the following is a specification. a modification in the arrangement of the cut- Cutting or trimming attachments have been ter-shaft bearing. applied to someextentto sewing-machines for a denotes the frame of the machine; 1), the

[0 the purpose ofcntting off the edge of the work work-plate. Above the plate are theneedle, on a line equidistant from the" seam, such atneedle-bar, and presser-foot, and beneath the tachments being particularly useful in machineplate the looper and feed-bar, all of these parts, stitchingleather. For such attachments averwhich constitute the stitch-forming mechantically-reciprocatingcutterhas sometimes been ism, being operated in the ordinary manner,

1 used,sometimesa rotary disk-cutter at the end a horizontal shaft, 0, above the table and a ofa horizontal shaft turningin stationary bearhorizontal shaft, d, below the table effecting lugs, and sometimes a rotary disk-cutter 11a the respectiveand relative movements of the ing intermittent vertical movements, the cutneedle and the looper and feed-bar, these two ter moving up just before the cloth is fed and shafts being actuated from a driving-wheel, e,

20 remaining up during the feed, it having been haying a gear,f, meshing into pinions g h on found that the cutter as a hinderance to the the shafts c d. The wheel 0 has another gear, feed, and not so efl'ective in its cutting operai, meshing into a pinion, k, on a shaft, l, and tion, if in contact with the work during the this shaft 1 is thecutter-shafhjournaled at its feed. rear end in the frame a and passing over the z 5 My invention has reference to the employtable or work-plate b in a bearing, m, on top of ment of a rotary cutter at the end of a horiwhich the frontpart of the shaft is journaled. zontal shaft, and to such an arrangement of At the extreme trout end of theshaft l is the the mechanism as shall throw the cutting-edge rotary cutter n, shown as having a circular peout of action during feeding of the work. I riphery extending almost arouudit, but broken 0 journal my cutter shaft in stationary bearatone part, as seen at 0. The better to show ings, (or bearings thatarc stationary while the the break, the cutter is represented in Fig. 1 machine is operating,) and I form the cutter as in that position in which said break is upwith intermittent cutting-edges at one or more permost. The circular part of the cutter runs breaks in the circular periphery, and I so arin a groove in the bed I), but the part 0 (as the 5 range the parts and so time them in their rewheel brings such part' undermost, or into a spective movements that when the feed-bar position the reverse of that shown in Fig. 1) is moves laterally to feed the work a break of above the plane of the table and of the top of the cutter-wheel shallbe injuxtaposition to but the work.- The parts are so timed in their renotin contact with the work, so that there shall spective movements that the feed-bar moves 4.0 be no obstacle to the feed and no drag of the to fcedthe work while the part 0 of the wheel work against the rim'of the cutter, the cutting is next above the work, the feed being comor trimming being effected between the feed pleted and the work stationary by the time the 0 movements of the feed bar, or while the work edge m, Fig. 1, of the part 0 of the cutter (by is stationary. which edge wthc cuttingof the work is effected) 5 -My invention consists primarily in comhiiicomes in contact with the work. As the cut-- ing with the stitch-forming mechanism a roter continues to rotate, the cutting-edge a; of tary cutter having the cutting part or parts of the part 0 thereof passes through the 'newly- 9 5 its periphery eccentric to its axis of rotation. fed portionof the work, and thus the trimming or cutting of the latter is eii'ected without hinderance to the feed.

The part 0 may be simply eccentric to the peripheral circular edge of the cutter; but it is preferably made straight, and the wheel may be made with several cutting-edges atintermittent breaks of the circular periphery, the cutter. being of such diameter and its shaft so geared as to bring one of the breaks into position next above the work whenever the lat ter is beiii g fed.

The bearing for the front end of the shaft I form upon or apply to one end of a strong spring, 21, the stress of which tends to raise the bearing, and from the vbearing I extend'a tongue, q, over which an inclined lip, 'r, on a button or lever, 8, slides to bring down the bearing against thestress of the spring and hold the cutter-shaft in position for the cutter to act. from the tongue the spring throws up the bearing and shaft and cutter, the cutter'being'then out of cutting position, so that work may be freelyfed under it and without being acted upon by it.

To keep the edge of the cutter in good conditi0n,I set into the part of the work-plate that When the lever-lip is-thrown away it enters a soft-metal plate, t, in which I make a groove for entrance of the cutting-edge.

Sometimes I prefer to arrange the cutting mechanism so that'when thrown out of action the whole work-plate may be left free from the appendages of the cutter to permit the work to be movedover its whole surface, and for this purpose I hang the bearing for the front end of the shaft from the head or part of the frame over the work-plate.

Fig. i shows such a modification, in which the bearing is so hung, and is also made to be held up out of cutting action by a spring, and to be held down by a lever or other suitable mechanism.

.1 claim- The combination, substantially as hereindescriberhwith stitch-forming mechanism, of a rotary cutter having its cutting edge or edges eccentric.

In testimony whereofI have signed my name to this specification in the presence of two suhscribing witnesses.

SAMUEL W. SHOREY.

Witnesses:

G. W. GREGORY,

I. B. CHASE.

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