US101779A

US101779A - Machines

Info

Publication number: US101779A
Authority: US
Publication date: 1870-04-12
Anticipated expiration: 1887-04-12

Description

F. SPOEHR.

Mechanism for Operating the Feeding Wheel in Sewing Machines. No. 101,779. Patented April 12, I870.

u. PETERS. PMo-Liihugraphlr. Wnnlnginn. o. c,

IMPROVEMENT IN MECHANISM FOR FRIEDRICH SPOEHR, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 101,7 7 9, dated April 12, 1870.

OPERATING THE FEEDING-WHEEL IN SE WING- MACHINES.

The Schedule referred to in these Letters Patent and making part or the same To all whom it may' concern Be it known that [,FRIEDRICH SPOEHB, of the. city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Im-- provements in the Feed-motion of Sewing-lVI-achin'es; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying sheet of drawings, and,

to the letters of reference marked thereon, in which- Figure l is a perspective view; Figure 2 is a front View; and Figure 3 is a back view. Similar letters refer to similar parts in the several views.

A is the feed-wheel of a sewing-machine. Turning independently on its hub, by means of suitable mechanism, is a driver, constructed and operated as follows:

A driving-piece, B, which turns independently on the hub O of the feed-wheel, has" a crank-end, D, and

an adjusting holding-down plate, E,'on opposite ends. The crank-end is jointed to a shoe-feed lever, F,

by an intermediate lever, G, forming such an angle that the act-ion of the crank on it will not be lost.

The'shoe-lever has the shoes H I on opposite sides of the flange act the feed-w heel, fig. Their surfaces of contact exactly coincide withthe inner and outer surfaces of the flange. They are confined in their relative positions beneath the shoe and feedlever, and receive its motion by meansof the downwardly-projecting pins 0 (I, which take into suitable openings in the shoes.

The shoe-lever is prevented from lifting by. the setscrews e f of the end E of the driving-piece B.

When the driving-piece B is turned on the hub of the feed-wheel in the direction of the arrow g, the intermediate connecting-lever Gr forces or pushes the shoe and feed-lever F and its shoes around the flange a of the feed-wheel, which is accomplished without theshoes pinching the flange; but when it is turned in the direction of the arrow h, the intermediate counecting-lever pulls the shoe and feed-lever after it, which tilts its lower end and causes the shoes to firmly bite or press on the flange (I, and carry the feed-wheelin the same direction.

The feed-wheel of a sewing machine must necessarily have an intermittent rotary motion. It .will be readily seen that the driver-mechanism produces the same when vibrated respectively in the direction of the arrows g h.

v The wear of the shoes against the flange a, is taken up by means of a bolt, '1, and spiral spring m, placed in a suitable opening in' the end E of the driver B as they wear, the spring forces the bolt against the pro- 'jectiou H of the shoe and feed-lever, which increases the distance between the end E and the said projection, and also increases the angle 11,, formed by the shoe-feed lever and the intermediateconnecting-lever G, which causes a greater tilt in the shoe-lever when turning in the direction of the'a-rrow h.

What I claim as my invention, and desire to secureby Letters Patent, isp 1'; The feed-wheel A, driving-piece B, shoe and feed-lever F,'shoes H I, and the intermittent lever G, when constructed and arranged substantially as shown.

2. The driving-piece B, in combination with the bolt 1), spring an, shoe and feed-leyer F, shoes H I, and the pins 0 d, as shown. v

In testimony whereof I hereunto sign my name to this specification in presence of two subscribing witnesses.

' FRIEDRICH SPOEHR. Witnesses:

FRANCIS D. PASTORIUS, WILLruM BRoscn.