US423817A

US423817A - Sewing-machine

Info

Publication number: US423817A
Authority: US
Publication date: 1890-03-18
Anticipated expiration: 1907-03-18

Description

(No Model.)

1 T. O. ROBINSON.

SEWING MACHINE.

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UNITED STATES PATENT OFFICE.

v THOMAS C. ROBINSON, OF BOSTON, ASSIGNOR OF ONE-HALF TO E. B. IVELOH,

' OF CAMBRIDGE, MASSACHUSETTS.

.SEWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 423,817, dated March 18, 1890. Application filed September 15, 1888- Renewed November 2, 1889. Serial No. 329,033. (No model.)

To aZZ 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 folded fabrics to while they are being'stitched by a sewingmachine; and it consists in the combination of a presser-foot having a folding-guide with a feed-bar having a lip or guide arranged to guide the folded edge of a fabric folded by I 5 said guide, as I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a side elevation of the needle, the feed-clog having the lip or guide, and the presser-foot having the folding-guide. Fig. 2 represents a section on line 00 ac, Fig. 1. Figs. 3 and 4 represent, respectively, perspective views of the presser-foot and feed-bar.

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

In the drawings, a represents the feed bar or dog, which may be operated by any suitable mechanism adapted to give it the usual horizontal and vertical reciprocating motion s. 0 At one edge of the feed-bar is a lip or 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 guide being higher than the under surface of 3 5 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 inner edge of a fold or, welt d in a piece of fabric, keeping said edge in proper relation to the needle c, While its upper edge supports that part of the fabric that projects beyond the welt, as seen in Fig. 2. The lip a is preferably arranged with its highest portion in advance of the presser-foot, as shown in Fig. 1, the upper edge of the lip being inclined 5 downwardly, so that at that part of the presser-foot which contains the needle-hole the upper edge of the lip is but little higher than the operating-surface of the feed-bar.

f represents the presser-foot, on theforward end of which is formed a C: shaped foldingguide, which forms the welt and holds the folded outer edge of the same against the lip a. i

It will be seen that by the conjoint action of the folding-guide on the presser-foot and the lip or guide a on the feed-bar, the welted edge is accurately guided and controlled, so that it will be necessarily uniform in Width and will be stitched at a uniform distance from its outer edge.

In another application filed byme of even date herewith, Serial No. 329,032, I have shown the feed-bar having the lip or guide a in combination with another form of presserfoot, and I do not, therefore, in this applica tion claim, broadly, the combination of said feed-bar and any presser-foot capable of being used therewith; but

What I do claim is-- The combination, with the feed-bar having the raised lip or guide, of a presser-foot having a folding-guide arranged to hold a fold or welt against said lip, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 4th day of September, A. D. 1888.

THOMAS C. ROBINSON. lVitnesses:

O. F. BROWN,

A. D. HARRISON.