US249155A

US249155A - James h

Info

Publication number: US249155A
Authority: US
Publication date: 1881-11-08
Anticipated expiration: 1898-11-08

Description

(No Model.)

J. H. BULLARD.

EEED MEGEANISMIEOE SEWING MACHINES.

Patented Nov. 8,1881.'

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UNITED STATES PATENT OFFICE.

JAMES H. EULLAED, CF SPRINGFIELD, MASSACHUSETTS, ASSIGNCE To THE SPRINGFIELD SEWING MACHINE COMPANY, CF SAME PLACE.

FEED MECHANISM .FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 249,155, dated November 8, 1881.

- Application filed July 2:11881. (Nomade.)

To all whom it may concern:

Be it known that I, JAMES H.BULLARD, of Springfield, in the county ot' Hampden and State of Massachusetts, have' invented a new and useful Improvement in Take-Up Mechanisms for Sewing-Machine Feeds, of which the followingis a speciiication and description.

The object of my invention is to provide means for takin g up the lost motion occasioliied by the Wear of the feed-bar in a sewing-inachine; and I accomplish this by the means substantially hereinafter described, and illustrated in the accompanying drawings, in which- Figure I is a reverse plan view of that portion of a sewing-machine bed to which my invention is applied. Fig. II is a plan view of the inside of my adjustable feed-lever cap.

` Fig. III is a section ot' thesame at line C.

In the drawings, A represents the bed of an ordinaryfsewing-machine of the class in which the shuttle is moved in a curved raceway by a pivoted shuttle-driver, and in which the feedbar having the feed attached is moved both horizontally and vertically bya feed-lever provided with an incline, which engages against thelower side ofthe feed-bar, so that the trans verse movement of the engaging end of the feed-lever will move the feed-bar and the feed attached thereto in a direction substantially parallel with the cloth-plate or the bed of the machine, and the longitudinal movements of the feed-lever andthe incline made thereon beneath the feed-bar will cause the latter and the feed to rise, `this being the ordinary construction of sewing-machines of this class, a spring being usually attached to the bed of the may chineand engaging with the feed-bar to move the latter and the feed down.

ln the application of myinvention to a sewing-machine I may use the same feed-lever as above described, the construction of which is well known,) and actuated by any suitable mechanism to cause it to give the required horizontal and vertical movements to the feedbar and feed attached thereto.

l represents the feed-lever cap, one end of which, on the inside7 is provided with project-` ing guide-Ilan ges, as 4, and that end of the cap is also provided with an elongated hole through it, as at 2. The flat -portion at 20, which is on the upper or inside, forms the seat to Support the feed-lever, and upon which the latter moves, and the two grooves, as 6, each Side the seat 20, serve to receive any surplus oil and dirt which may work out from between `the feedlever and its seat; and at vthe end of the cap opposite the elongated hole 2 is made a projection, as 9, against which, when the cap is in place, the pivoted feed-bar 7 rides or bears as it moves both vertically and longitudinally. The outer end of a raised boss, B, on thelower side of the bed, ts nicely between the flanges 4 of the lcap l, and the latter is secured to the boss by a Screw, as 3, turned through. the elongated hole 2 and into the boss, and the cap is secured in place with the projection 9 close against the feed-bar 7, but just so the latter may move freely between saidprojection 9 and the bearing l0 cast upon thebed.

If at any time the parts s'hould Wear away at these bearings su'flciently to cause lost motion of the feed-bar, the cap 1 may, after loosening the screw 3, be moved up closer to thefeedbar 7, and the screw 3 be tightened again and the lost motion taken up.

As the result in the work of a sewinguna chine, as to its appearance, depends largely upon the operation of the feed mechanism, it follows that if the latter is perfect and uniform in its operation the appearance in the stitching when finished will be correspondingly uniform. Henoethe iinportanceofpreventing any variation in Vthe movement ot' the different parts of the feed mechanism.

i Having thus described my invention, what I claim as new is The combination, with the bed ot' a. sewingmachine, of an adjustable cap to support the feed-lever, and provided with a projection to support and serve as a side bearing for the feedbar, substantially as and for the purpose described.

' JAMES H. BULLARD. Y Witnesses: T. A. CURTIS, E. M. BISSELL.