US351051A - Feeding mechanism for sewing-machines - Google Patents

Description

(No Model.)

0. F. HARLOW & B. E. ANGELL.

FEEDING MECHANISM FOR SEWING MACHINES.

No. 351,051. Patented Oct. 19, 1886.

N PETERS Pholo-Limographor. Wnshinplon. D. c.

UNTTED STATES CHARLES F. HARLOW AND EDWIN E.

PATENT OFFICE.

ANG-ELL, OF MALDEN, ASSIGNORS TO THE GLOBE SERVING MACHINE COMPANY, OF BOSTON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 351,051, dated October 19, 1886.

Serial No. 179,835. (No model.)

To aZZ whom it may concern.-

Be it known that we, CHARLES F. HARLOW aud'EDWIN E. AXGELL, both of Maiden, in the county of Middlesex and State of Massachusetts, have jointly invented a new and useful Improvement in Feeding Mechanisms for Sewing Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

The object of this invention is to provide an improved feeding mechanism for sewing-ma chines and to so arrange the parts as to give the desired movement and regulate the stroke in the simplest manner.

1 Our invention consists in the combination of devices set forth in the appended description and claim.

In the drawings, Figure 1 is a plan view with parts broken away, showing a portion of the feed-bar in horizontal section. Fig. 2 is a vertical central section on line (L a, Fig. l; and

Fig. 3 is a transverse section on line or as, Fig. 1,

and Fig. i is an enlarged detailed view of the feed-cams and a portion of the feed-bar.

A denotes the base of the machine, and A a standard thereon, serving as a support for the work-plate and affording a bearing for the forward end of the feed and looper shaft E.

Secured to the shaft E are two cams, R and R,

which may be formed in one piece, (or as a double calm) and may also be integral with a collar, B, secured to said shaft, as shown in Fig. 2.

Q is the feed-bar, which is provided with a 3 5 vertical offset-shoulder, Q, preferably padded with leather, rawhide, or similar durable nonmetallicmaterial. The cam Rimpinges against the said shoulder to movethe feed-bar forward against the stress of a retracting-spring,

S, which latter is connect-ed with the feed-bar and the base A or the standard A. The feedbar Q, is also provided with a yoke, Q5, the horizontal inner faces of which closely embrace the cam B, so that the latter as it revolves 5 imparts positive vertical movements to the feed-bar, there being sufficient play between the vertical faces or ends of said yoke and said cam to permit of the proper horizontal movements of said bar. The feed-bar Q is sup- 5o ported at its rear end by a pin or screw, T,

which passes through a slot in said bar into the standard A.

U is a 1aterally-p roj ecting arm secured to or formed integral with the feed-bar Q, said arm being provided with an ordinary serrated feed surface or dog, U.

Y is an ordinary feed-regulating cam-lever, said lever being preferably recessed on one side for the reception of a buffer, Z, of leather or similar non-metallic material, which is 10- 6o cated in line with the yoke Q of the feed-bar Q so as to serve as a back stop for said feedbar as the latter is retracted by the spring S.

By adjusting the cam-lever Y to different positions the throw of the feedbar may be regulated in a well-known manner.

The full or acting portions of the cams R and R are arranged opposite to each other, or nearly so, so as to act alternately on the feedbar. Thus as the shaft E is rotated the cam R, acting against the upper inner face of the yoke Q", raises the feed-bar to engage thefeeddog U with the work. The full face of said cam being concentric with the shaft E, the feed-bar is held positively in its elevated po- 7 5 sition while the full face of the cam R acts against the shoulder Q to move the feed-bar and the work forward, and thelatter cam holds the feed-bar at the end of its forward throw while the cam R, acting against the lower innor face of the yoke Q", lowers the feed-bar positively, and the said bar is then returned to its first position by the retracting-spring S, thus giving the proper four-motion movements to the feed-dog and insuring a noiseless feed, with positive upward, forward, and downward movements.

\Ve are aware that it is not new to operate a feed-bar by means of two oppositely arranged eams on a rotating shaft, and we do not therefore wish to be understood as claiming this feature, broadly; but

\Vhat we do claim, and desire to secure by Letters Patent, is

In combination with the shaft E, the op- 9 5 positely-arranged cams Rand R carried thereby, and the feed-bar having a vertical offsetshoulder, against which the cam R acts, and having also a yoke, the horizontal inner faces of which closely embrace the cam R, with suffi- 10o I cient space between the vertical or end Walls two subscribing witnesses, on this 8th day of of said yoke to permit said bar to move hori- 'October, A. D. 1885. zontally on said cam It, combined with a re CHARLES F. HARLOWV. treating-spring and feed-regulating lever, sub- EDWIN E. ANGELL.

stantiztlly as set forth. WVitnesses:

In testimony whereof We have signed our A. H. SPENCER, names to this specification, in the presence of C. G. KEYES.

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