US168757A - Improvement in sewing-machines - Google Patents

Description

L. LYON. Sewing-Machine Patented on. n, 1875.

N0.LI68,757.

N. PEI'ERS. FHOTO-LITHOQRAPHER. WASHINGTON. D c,

cam STATES mum.

LnoIUs LYON, OFiNEW Y-ORK, N.- Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No- 168,'757, dated October 11, 1875; application filed I April 13, 1874.

To all whom it may concern Be it known that I, LUcIUs LYON, of the city, county, and State of New York, have invented certain Improvements in Sewing- Machines, of which the following is a specification:

This invention relates to a certain combination of devices for regulating the throw of the feed-dog of sewing-machines for the purpose of regulating the length of the stitches; and it consists in the combination, with the rockshaft which carries the arm which operates the feed-dog, of a slotted lever carrying an adjustable slide, which may be shifted as desired by means of a set-screw, said slide being pivoted to the lower end of a rod connected to" an eccentric on the main shaft of the machine, by means of which the proper motion is imparted to the rock-shaft. By setting the slide away from or toward the rock-shaft it will be moved a greater or less extent at each rotation of the main shaft, thus increasing or diminishing the throw of the feed-dog and regulating the length of the stitches. The slide is adjusted by simply turning the set-screw in either direction, as may be desired.

In machines as hitherto constructed-the slide has been made adjustable in the slotted crank by means of a binding-nut at one side. By such construction the use of a wrench is necessitated, and, in order to shift the slide, the nut has to be loosened and the slide 7 shifted to proper position by hand, after which the nut is again tightened. The present invention is designed to obviate the "inconvenience attendant upon this .method of shifting the slide, and provide a device by means of which the slide may be shifted and fastened at one operation.

In the accompanying drawing, Figure 1 represents a sectional side view of this invention, and Fig. 2 is a longitudinal vertical section of the shuttle-race, showing the shuttledriving mechanism.

I In the drawing, the letter A designates the cloth-plate of the sewing-machine, from which rises the standard B, that forms the bearing for the driving-shaft O, and to the face of which are secured the needle-slide and the .the breast of the shuttle-race.

presser-slide in the ordinary manner. To the under surface of this cloth-plate is cast, or otherwise attached, a flange, D, which forms The shuttle S is supported in a cradle, E, formed between two arms, a a, of a bifurcated lever, F, by two wires, 1) b, which are secured in the ends of said arms in the proper position to form a support for the shuttle. The arm a is hollowed out to admit the point of the shuttle, and on the arm a is pivoted a button, 0, which can be turned back, so as to allow of introducing or removing the shuttle. The lever F is secured by a set-screw, d, to the end of a rock-shaft, e, which has its bearings in lugs f projecting from the under surface of the cloth-plate, and which connects by a crank, g, and rod h with an eccentric, c, mounted on the driving-shaft. By adjusting the lever F the motion of the shuttle can be brought in the proper relation toward the motion of the needle, and by the action of the eccentric and crank the mechanism for driving the shuttle is rendered noiseless, and my machine can be driven with great speed without danger of dropping stitches or of producing a disagreeable noise. l

.On the driving-shaft O is mounted an eccentric, k, which connects by a rod, 1, with a slide, m, which is fitted in a slot, 0, constructed in a crank, p, (see Fig. 2,) the said slide being adjustable in said slot by a thumbscrew, g, which passes through the crank and the slide, as clearly represented. The crank p is mounted on one end of a rock-shaft, 1',

tion, merely requiring a turn of the set-screw to move the slide.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

The combination, with the rock-shaft 1", provided at one'end. with an arm, t, for operating This specificzgtion' signed by me this 31st the feed-dogof a sewing-machinehof the addayof March, 1874. l 'ustable rod..leccentric k slotte crank 1), adjustable slie m, the set-screw q, passing LUOIUS O through the crank p, and slide m, for moving Witnesses: the latter back and forth, as and for the pur- W. HAUFF, pose described.

E. F. KASTENHUBER.

Images