US213548A - Improvement in sewing-machines - Google Patents

Description

3 SheetsSheet 1. G. H. W. CURTIS.

V flewing-Maohine. No. 213,548. Patented Mar. 25, 1879.

",PETERS, PNOTO-LITHUERAPHER, WASHINGTON, u C

3 Sheets-Sheet 2. G. H. W. CURTIS. Sewing-Machine.

aatented Mar. 25, 18 79..

N. PETERS. PHOTO-LITHOGRAPHER, WASHINGTON D C 3 Sheets-Sheet 3,

G. H. W. CURTIS. Sewing-Machine.

Patented Mar. 25, 1879. I

MPETERS, PHOTO-UTNOGRAFHER. WASHINGTON D C UNITED STATES PATENT OFFICE.

GEORGE H. w. CURTIS, E BROOKLYN, NEW YORK, ASSIGNOR TO WHEE-EER wILsON MANUFACTURING COMPANY, OF BRIDGEPORT, CONNECTICUT.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 213,548, dated March 25, 1879; application filed January 30, 1878.

To all whom it may concern Be it known that 1, GEORGE H. W. CURTIS, of Brooklyn, county of Kings, State of New York, have invented a new and useful Improvement in Sewing-Machines, which is fully set forth in the following specification and accompanying drawings, in which- Figure 1 is a side elevation of my improved machine; Fig. 2, a plan View of the arm thereof, with a portion cut away; Fig. 3', a front elevation thereof; Fig. 4, a central section, in part, of the arm, showing interior mechanism; Fig. 5, a fragmentary portion of the same; Figs. 6, 7, 8, 9, 10, 11, and 12, detached views of various parts.

The object of my invention is to enable shoefitters to stitch various seams in shoe-uppers and other articles which could not be stitched on a table machine, such as the boxings after the front and back seams are closed, or seams in boots after they are made, and a variety of work necessary to be got at from the inside; and my improvement consists in adapting a rotary hook, straight needle, and a fourmotion feeding mechanism, carrying and stitching work across a tubular arm.

A represents the bed of the machine; B, the main shaft; 0, the tubular arm; D, the fourmotion feed; E, the throat-plate; F, the hookshaft; G, the needle-cam; H, the take-up; I, the needle-bar K, the rotary presser-wheel; L, the ten sion-Wheel; M, the connectingplate N, the ring-slide O, the rotary hook; P, the feed-cam;

the feed-bar. Q is a rightangular projection attached to feed-bar; R, the stitch-regulatin g screw; S, the spiral spring that Secures the ring-slide in position; T, the bObbin-sprin g U, the lever to regulate its pressure; V, the pin on which the feed rocks; W, the hook-adjusting screw; X, the sleeve; Y, the needle-lever; Z, the variable motion disk; 1 and 2, the pins thereof; 3, the tension-finger; 4, the tension- Sprin g; 5, thefeed-spring; 6,thetension-adj usting screw; 7, the presser-foot bar; 8 and 9, the collars on the shaft, in which are the variablemotion pins; 10, the tension-pad.

It is not necessary to State in detail the action of the parts common to previous wellknown rotary-hook machines whereby motion is given to the hook, needle, and feeding mechanism, save as they are peculiar to this machine.

The main shaft B obtains a variable motion by the action of disk Z and pins 1 and 2 in the shaft-collars 8 and 9 on each side of the disk, to impart a slower movement to the hook at the time it is entering the loop, and a quick movement when it is casting it off.

The hook-shaft F is connected to the main Shaft B by sleeve X, with a set-Screw, whereby the rotary'hook may be adjusted so that its point shall reach the loop Sooner or later, as desired.

As the tubular arm for the necessities of shoe-work must be small,'new means of op eratin g the feed and tension are required. Feed-cam P lifts feed D, rocking on pin V, and carries it forward; curved spring 5 brings it down and back.

What I claim as my invention, and desire to Secure by Letters Patent, is

The Combination of the tubular arm 0, feedbar Q, provided with the right-angled projection Q, cam P, pin V, and spring 5, substantially as and for the purposes set forth.

GEORGE H. W. CURTIS.

Witnesses:

S. J. GORDON, JOHN W. RIPLEY.

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