US423816A

US423816A - Feeding mechanism for sewing-machines

Info

Publication number: US423816A
Authority: US
Publication date: 1890-03-18
Anticipated expiration: 1907-03-18

Description

(No Model.)

T. 0. ROBINSON. FEEDING MECHANISM FOR SEWING MACHINES. No. 423,816.

Patented Mar. 18, 1890.

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UNITED STATES PATENT OFFICE.

THOMAS C. ROBINSON, OF BOSTON, ASSIGNOR OF ONE-HALF TO E. B. \VELOI-I OF CAMBRIDGE,

MASSACHUSETTS.

FEEDING MECHANISM FOR S EWING==MACHINES.

SPECIFICATION forming part of Letters Patent No. 423,816, dated March 18, 1890.

Application filed February 9, 1888. Renewed November 2, 1889. Serial No. 329,032. (No model.)

To all whom it may concern:

Be it known that I, THOMAS C. ROBINSON, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a specification.

This invention has for its object to provide improved means for guiding and feeding 1o folded or welted fabrics While they are being stitched by a sewing-machine; and it consists in the several improvements hereinafter described, relating to the feedbar and presserfoot of a sewing-machine.

I11 the accompanying drawings, forming a part of this specification, Figure 1 represents aperspective view of the feed-dog forming a part of my invention. Fig. 2 represents a perspective View of the presser-foot. Fig. 3

represents a side elevation of the feed-dog, presser-foot, and needle. 4 represents a section on line 00 00, Fig. 3. Fig. 5 represents an enlargement of a portion of Fig. 4, showing the fabric and welt as guided by my in- Fig. 6 represents a perspective View of apresser-foot having a folding-guide. Fig. 7 represents a front view of the foot shown in Fig. 6 and a section of the feed-dog.

The same letters of reference indicate the same parts in all the figures.

In the drawings, (4 represents the feed bar or dog of a sewing-machine. Said feed-bar is operated by any suitable mechanism adapted to give it the usual horizontal and vertical re- 3 5 ciprocating motions.

At one edge of the feed-bar isalip-guide a, which projects above the serrated portions of the feed-bar and above the throat-plate c of the machine, the upper edge of said lip or 0 guide being higher than the under surface of the presser-foot f when the latter is in its normal position. Said lip is so arranged that its inner side supports and guides the edge of a fold or welt din a piece of fabric, keeping said edge in the proper relation to the needle e, while its upper edge supports that part of the fabric which projects beyond the welt, as

seen in Fig. 5. The upper edge of the lip a is preferably serrated to enable it to feed the fabric resting upon it. The lip a is prefer- 5o ably arranged with its highest portion in advance of the p'resser-foot, as shown in Fig. 3, the upper edge of the lip being inclined down'- Wardly, so that at that part of the presserfoot which contains the needle-hole the upper edge of the lip is but little higher than the operating-surface of the feed-dog. It will be seen that the lip or guide enables a Welted piece of fabric to be stitched at a uniform distance from the edge of the welt, and insures the feeding of the projecting edge of the upper ply or fold of thewelt at the same rate as the portion resting on the ordinary acting face of the feed-dog. The presser-foot f has a recess f in its under surface and inner edge to receive the portion of the fabric that rests on the lip or guide a.

In Figs. 6 and 7 I have shown a folding guide 1' attached to the presser-foot, and formed and arranged to hold the Welt against the lip a, as shown in Fig. 7. Said folding guide is claimed, in combination with the feed-bar having the lip a, in another application for Letters Patent filed by me of even date herewith, Serial No. 329,033.

I claim- 1. The combination, with a presser-foot, of a feed-bar having at one edge a lip or guide projecting above the throat-plate and above the operative surface of the presser-foot and serrated 011 its upper edge, as set forth.

2. A feed-bar having at one edge a lip or guide projecting above the throat-plate, combined with a presser-foot recessed to receive the upper edge of said lip, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 17th day of August, 1887.

THOMAS C. ROBINSON.

Witnesses:

C. F. BROWN,

ARTHUR W; GRossLEv.