US146761A - Improvement in sewing-machines - Google Patents

Description

L. als'woLn.

Sewing-Machines. No. 146,761. Parenredlamzmam.

2Sheetsf-Sheetf2. L. alswoLn. A Sewing-.Machines.

Patented Jan. 27,1874.

VvNITED STATES' LEO GRISWOLI), OF NEW YORK, N. Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 146,761, dated January 27, 1874 application filed v June 21, 1873. t

To all whom it may concern:

Be it known that I, LEO GnrswoLD, of the city,'county, and State of New York, have invented certain Improvements in Sewing-Machines; ,and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawin gs, making a part of this specification.

The` nature of my invention consists, first, in the peculiar construction and arrangement of the driving-gear, a horizontal driving-shaft,

and a' vertical transmitting-shaft, having a rawhide pinion and a ily-wheel thereon, and formed with a crank; second, in the shuttlecase provided with a detached race on which the shuttle moves, and which is provided with a single adjusting screw, all substantially as hereinafter set forth.

In the accompanying drawings, Figure l is a side elevation of a sewing-machine constructed with my improvements; Fig. 2, a side elevation thereof, looking in the opposite direction; Fig. 3, a central vertical section of the case which bears the needle and presserbars, showing the said bars in elevation; Fig. 4, a partial section, corresponding with the view in Fig. 3, but showing the take-up77 device in a different position; Fig. 5,a view of a portion of the vertical transmitting-shaft, showing its pinion, crank, and left-handed screw `andnut; Fig. 6, a view in perspective of the doubly-adjustable cloth-feeding device; Fig. 7, a vertical section across the shuttlecase and race, showing also the cloth-feeding.

\ device; Fig. 8, a top view of the shnttle-case;

Fig. 9, a top view of 'the shuttle; Fig. 10, a partial longitudinal` section of the same; Fig. 1 l, a view of the driving-treadle, showing its arrangement on a curved shaft. l

Like letters designate corresponding parts in all of the iigures. y

A represents the cloth-plate on which the `working parts are mounted; B, the needle and presser-plate arm; C, the needle-bar; D, the ,f

presser-bar E, the vertical transmitting-,f shaft; F, the bearing-case for the needle andi presser-bars G, a bracket beneath the clothplate, to support the driving-shaft and gear; H, the takenp device composed of a springdisk, I, and laterally-vibrating pin K, opera- `Lin g in connection with the camrecess L in the needle-bar; M, an adjustable collar on the presser-bar, to adjust` the force `of the pressing-spring N, the raw-hide pinion on the transmittingshaft E; O, the bevel drivinggear, matching into the pinion N, and provided with a crank-pin to receive a connecting-rod, O2, which extends up from the treadle b, with its downwardly-curved shaft c,- P, a crank on the transmitting-shaft E, for operating the shuttle; Q, a left-handed screw, and It the nut upon the said screw; S, a steel step, or journal, on the lower end of the vertical shaft E; T, a hard-steel collaron the shaft above the journal to sustain the shaft and make it run light and with but little wear; V, a cam on the transmitting-shaft for operating the needle-bar; W, a iy-wheel situated on the upper end of the vertical Ishaft E; X, the horizontal driving-shaft; Y, the shuttle; Z, a swinging-bar or plate in the shuttle, provided wi th a spring, a, and adj listing-screw a2, for holding the bobbin in the shuttle and regulating the -t-ension of the bobbin-thread. The horizontal driving-shaft X, by having a crank-pin on its drivin g-gear wheel O,`receives the power from the treadle without additional parts, and the said bevel drivinggear wheel transfers the power to the vertical transmitting-shaft E, which, being partly below and partly above the clotlrplate A, is in the best possible position for transmitting motion to the needle as well as to the shuttle and the cloth-feeding device. The rawhide pinion N renders the mot-ion of the driving and transmitting devices nearly noiseless. The left'handed screw Q and nut It are eii'ectually prevented from unscrewing by the revolving motion of the shaft E` being in the opposite direction and tending rather to tighten than to unscrew them. The ily-wheel W is upon the transmitting-shaft E, which revolves faster than the driving-shaft X, and may be made lighter and smaller, with equal effect, than if it revolved more slowly.

The needle-bar, shuttle, and clo th-feedingde vices are all operated directly from the'trans mittingshaft E. The shuttle-case f, in which the shuttle-driver g slides, has a separate or detached race on which the shuttle moves. The case is so made as to hohl this detached race in position and allow it to be adjusted up and down therein. A single screw, h, passing up through the bottom ofthe case, adjusts the race to the height required.

That I claim as lny invention7 and desire to secure by Letters Patent, is-

1. The combination with the drivin g-gear O, on the horizontal drivin'gshaft X, and e crankpin for the reception of the treadle-rod O2, of the Vertical stepped transmittingshaft E, provided With the rawhide pinion N5 and crank and cam for operating the shuttle carrier-rod and needle-lever, and with u y-Wheel, W, 011

its upper end, all constructed and arranged substantially as and for the purpose herein specified.

2. The Combination of the shuttle-case f with its detached race on which the shuttle moves,

and the single adjusting-screw h, substantially as and for the purpose herein specified.

LEO GRISWOLD.

Witnesses:

ARTHUR NEILL, ABRAHAM LEVY.

Images