US480377A - Ors to the union - Google Patents

Description

(No Model.) I 2 SheetsSheet 1.

R. G. WOODWARD: & G. TIMM.

SEWING MACHINE TRIMMER.

No. 480,377. Patented Aug. 9, 1892.

2 y INVENTOR 7 wwfaglwmi i v (M/125mm, 7

(No Model.) 7 2 Sheets-Sheet 2.

R. G. WOODWARD & O. TIMM.

SEWING MACHINE TRIMMER.

No. 480,377. Patented Aug. 9,1892.

WITNES}ES I INVENTORS:

UNITED STATES RUSSEL G. WOODWARD AND CHARLES TIMM, OF CHICAGO, ILLINOIS, ASSIGN- PATENT OFFICE.

ORS TO THE UNION SPECIAL SEIVING MACHINE COMPANY, OF SAME PLACE.

SEWING-MACHINE TRIMMER.

SPECIFICATION forming part of Letters Patent No. 480,377, dated August 9, 1892.

Application filed August 19, 1890. Serial No. 362,383. (No model.)

To all whom it may concern:

Be it known that we, RUssEL G. WOODWARD and CHARLES TIMM, of Chicago, in the State of Illinois, have invented certain new and useful Improvements in Sewing-Machine Trimmers, whereof the following is a specification, reference being had to the accompanying drawings.

Our invention relates particularly to the I0 means for supporting, adjusting, and actuating the trimmer-blade and the combination therewith of peculiar adjustable feed devices.

In said drawings, Figure 1 represents a partial vertical section through the work-plate,

looking toward the head of the machine and showing the trimmer in one position. Fig. 2 is a partial section on the same plan, showin g the trimmer in another position. Fig. 3 is a View in elevation of the trimmer and its supporting devices detached. Fig. 4 is a plan View of the same parts. Fig. 5 is a view of that portion of the work-plate which is adjacent to the feed-slots and needle-hole. Fig. 6 is a top or plan View of the feed-dog. Fig.

7 is a top or plan view of a portion of said feed-dog detached, and Fig. 8 is a view in side elevation of said portion. Fig. 9 is a top view of the presser-foot.

The construction of the well-understood portions of the sewing-machine will not be described, but merely indicated by letters of reference.

Thus, A represents the base-plate; B, the work-plate; C, the presser-foot; E, the needle;

5 E, the needle-bar, and F the main drivingshaft.

The feed-dog as a whole is represented at G, and is supported and actuated by means of a rocking frame, only the rear supportingarm G6 of which is shown, but whose construction can be understood by reference to Letters Patent to Dewees, No. 400,833, dated April 2, I889.

The arrangement of the trimmer-blade and its actuating devices is as follows: Beneath the work-plate B, upon a vertical standard J here is pivoted at J 3 a frame M, whose bow- "haped front end encircles an eccentric F,

ounted upon the main driving-shaft F, the roper adjustment of the eccentric and its rap thus formed being controlled by a screw J". Upon the top of this frame and near the front end thereof is a transverse vertical rib M, which fits in, a correspondingly-shaped groove in the base of a horizontally-sliding piece N, adj ustably secured thereto by means of ascrew 0, working in a slot at. This piece N is provided with a lateral arm L, which carries at its outer end a vertically-slotted socket-piece I, the front side of the slot therein being inclined at a very slight angle to the vertical and the rear side being entirely open. The trimmer-blade I-I fits freely in said slot, being prevented from falling through downward by means of a transverse pin 1' at the bottom thereof. A nut L, having a beveled face, as shown, bears against the back of the blade II, holding it rigidly in position in the slot, and said nut also engages with a screw K, whose head bears against abeveled shoulder it upon the front face of the piece L, the screw being inclined at an angle of about forty-five degrees to the plane of the blade H. The rear face of the piece L has a beveled recess 02 to permit the entry of the rear edge of said nutgand hold it against turning. A spring Z between the inner face of the nut and the proximate face of the piece L normally presses the nut away from its seat.

Referring to Fig. 5 it will be seen that the work-plate is provided with the usual longitudinally-sliding plate B, the inner end of which abuts against asecond removable strip B adjustably secured by means of screws B fitting in slots 13*. Said strip contains a slot 9 to receive one of the feed-surfaces, and upon each side of said slot the upper surface of the strip is provided with teeth Z) Z). A narrow slot h, entirely inclosed within the metal of said strip B is provided for the trimmer-blade, which rises through said slot, so that notwithstanding the lateral adjustment with relation to the needle there is always a bearing-surface of metal around the trimmer-blade for the cloth. Thus not only is the action of the blade in cutting downward more efficient than Where a wide slot is provided to permit lateral adjustment of the blade, but the tendency of the blade to push down fragments of material is obviated. The plate 13 abuts in turn against another removable plate B and its edge is stepped, as

shown, to conform to the adjacent edge of said plate B which contains the needle-hole e and the slots 9 g g to receive the remaining portions of the feed-dog. There are thus five separate feed-slots, one of which g together with the trimmer-slot h, is adjustable toward and from the needle-hole by the adj ustibility of the plate B The feed-dog is shown in the plan view of Fig. 6, where it will be seen that there are five serrated portions of feed-surfaces, four of which G7 are in fixed positions, while the fifth G is laterally adjustable with relation to the others, being mounted upon ahorizontally-projecting basepiece G which slides in a groove in the rear portion G of the feed-dog, being adjustably secured thereto by means of a screw G working in a slot G Thus it will be seen that adjustment of the plate B in correspondence with the adjustment of the feed-surface G and knife H permits the trimming of the edge of the fabric at any desired distance from the seam, but that under all conditions of adjustment there is on each side of the trimmer a feed-surface in operative relation thereto.

The presser-foot G is attached to the presser-bar D by means of a clamping-ring D and screw D and is provided with the usual needle-hole 0. Immediately in front of said hole and behind the upwardly-curved front portion of the foot is a transverse groove, which receives a lateral arm 0' of the supplemental piece C, said arm being adjustably secured by means of a screw 0 fitting in an elongated slot of the arm. The front end C of the piece 0 is curved upward and inward to overlap the front (1 of the presser-foot, while the rear end D of said piece is flat and lies-parallel to the rear part of the presserfoot, leaving an intermediate slot (1 for the trimmer-blade.

The operation of the device as a whole is obvious. Simultaneously with the stitch-formin g action the trimmer receives an oscillating movement in a vertical plane parallel to the line of feed, and owing to the slight forward inclination of the blade a drawing out is effected. Not only are the goods held on both sides of the blade by the presser-foot and the teeth I) b, but the supplemental feed-surface G, co-operating with the piece D of the presser-foot, makes a positive feed at the margin.

We are aware that the use of a laterallyadjustable blade is not new, and that it is not new to provide a supplemental feed-surface outside of the trimmer-blade and laterally adjustable With relation to the needle. We do not broadly claim either of these devices, save in so far as they constitute elements of the combinations hereinafter set forth.

Having thus described our invention, we claim 1. The combination, with the stitch-forming mechanism, of the slotted work-plate, the oscillating trimmer-frame located below the work-plate, the laterally-adjustable arm carried by said frame, the socket-piece mounted upon said arm, and the trimmer-blade rigidly but removably secured beneath the workplate in said socket-piece and projecting at its upper end above the work-plate, substantially as set forth.

2. The combination, with the oscillating trimmer-frame and its laterally-projecting arm, of the slotted socket-piece having abeveled recess on its rear side, the trimmer-blade fitting freely in said socket-piece, and the screw and beveled nut adapted to enter said recess and to bear against the back of the blade, substantially as set forth.

3. The combinatiomwith the stitch-forming mechanism, the oscillating trimmer-frame mounted beneath the workplate, and the trimmer-blade rigidly mounted in said frame but laterally adjustable with relation to the needle, of a strip mounted in the work-plate and laterally adjustable with relation to the needle, said strip being provided with a trimmer-slot and a feed-slot immediately alongside thereof, each of said slots being entirely inclosed by the metal of the strip, and a feeddog having a laterally-adjustable supplemental feed-surface fitting in said feed-slot, substantially as set forth.

RUSSEL G. WOODWARD. CHARLES TIMM. Witnesses:

WILLIAM S. NORTH, CHESTER McNEIL.

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