US83398A - Improvement in sewing-machine - Google Patents

Description

. the arms a a a NICHOLAS MEYERS, OF BUFFALO, NEW YORK, ASSIGNOR TO EDWARD L. GHAlWBER- LAYNE AND EMERSON G. PQMEROY, OF SAME PLACE.

Letters Patent No. 83,398,- ddtell'O'ctober 27, 1868.

IMPROVEMENT IN SEWING MACHINE.

Schedule referred 'tojn these Letters Patent and making part: of the same.

To all whom it may coiwern:

Be it known that I, Nrcnom s Mnrnns, of Bnifalo,

, in. the State'of New York, have invented a new and useful Improvement in a Combined Feed and Presser- Foot for Sewing-Machines; and do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and letters of reference marked thereon, making a part of this specification, in which Figure 1 represents an end elevation, and Figures 2 and 3, elevations of opposite sides. This invention consists of a skeleton presscr-foot,

. so made as to encloseand protect a feed-plate, situated, together with the mechanismwhich operates it, above the cloth-surface of a sewing niachine; and also of various devices for giving due motion to said feedplate, as will hereafter more fully appear.

To enable those skilled in theart to make and use my invention, 1 nowproceed to describe. its construction and operation. v

Similar letters in the drawings refer to like parts.

Airepresents the bent arm of a sewing-machine, supporting a driving-shaft, B,-;near' one end ofwhich is an eccentric, b, above and on two'sides of which eccentric, and within touching. distance of the same, are

the arms a and a" being parallel, and the arm a being at right angles with the others, and connecting them. The arm a is pivotedat its lower end to the upper end of the shank'c of the feed-plate c, which feed-plate is also pivoted to the lower end ofthe said shank. The upper end of a spring-bar, c, is placed in'a notch in the outer side of the shank, c, and, in a manner, binds the said arm and shank together, so that the latter partakes, in a great measure, of the motion of the former. A slot is made longitudinally in the shank 0, through which slot a screw, 0', passes, and enters a plate, (I, attached to the fork a of the bent arm A. A portion of the said fork is removed, in order to admit of the introduction of the aim to and shank a between the'plate (Z and the end of the arm A, and leave a clearspace for the movements of the same. The shank 0 slides up and down, and also vibrates upon the screw 0*, and. between the head of the same and the plate (Z.

The motion of the shank c and the arm a is derived from the eccentric, b,which, during its revolution, forces the ann a in one direction, and, by consequence, the feed-plate c in the opposite. It is this motion of the plate that feeds the cloth forward. I The arm zt'iske'pt constantly in contact with the eccentric, I), by-the springbar 0, and as the said eccentric has but two curyes which are equal and uniform, at the completion of a half revolution, the arm a begins to move, in-follovv hog -the eccentric, in a direction opposite to its former movement, which throws the feed-plate back over the cloth, the teeth being arranged'to bite only during the forward throw.

There is probably no absolute necessity for more v than these two described motions of the feed-plate,

but, lest by some accident, the said plate should'fail to obackward by reason of catching in the cloth, certaii i devices are employed to lift it clear of the cloth,

the backward motion being still due to the pressure of the spring-bar c;

The aforesaid device consists of a second eccentric, 1), upon the shaft B, near the first, so placed as'to be complementary thereto, and a horizontal flange-ct on the inner side of the arm a, projecting over the said eccentric, b; Thus, when the revolution of the eccentric, b, is nearly complete, and the feed-plate is or should.

be at the rear end of its throw, the eccentric, I), strikes the flange a, and raises the arm a, and, by consequence,

the feed-plate, clear of the cloth. I

A spring, 0, attached to the under side of the arm A, and bearing upon a pin on the inner sideof the shank 0, controls the vertical motion of the feed-plate, Tile pressure-foot h is made in thefformbf abeiit loop, as seen in figs. l and 2, or in skeleton-form, as I choose to term it, so as to enclose and protect the rear plate. It is attached to a shank, h, which has in it a slot, It", through which passes a pin, (1, from the plate (I, and also a slot, it, through which passes a screw, 16', which enters the plateft, on the upper fork of the arm A. Thesc'slots and pins, together with a spring, h", control the vertical movements of the pressure-foot.

Having thus described my invention, \Vhatl claim as new, and desire to secure by Letters Patent, is-- a The feed-plate c, in combination with the'shank 0, arm a a a, spring-bar '0", and eccentric, b, as and for the purpose described.

NICHOLAS MLEYERS.

Witnesses:

HERMANN OHLMIER, ALBERT J. PAIGE.

Images