US146721A - Improvement in sewing-machines - Google Patents

Description

2 Sheets--Sheet 1,

` F. B.,TAYL0R.

Sewing-Machines.

Patented Jan. 20,1874.

di y y UNITED STATES FENNER BALLOU TAYLOR, OF LONDON, ENGLAND.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 146,721, dated January 20, 1874; application filed October 29, 1873.

To all whom it may concern.-

Be it known that I, FENNER BALLoU TAY- LOB, of London, England, have invented Improvements in Sewing-Machines, of which the following is a specification:

My improvements relate to that class of sewing-machines known as loop-stitch machines,77 and have for their object the construction of a machine which shall be lighter, more simple, and less expensive than any good machine heretofore produced, and embrace a novel arrangement for producing the feed and looping action in connection with the motion of the needle.

In my improved machine, the needle-bar is operated by a rocking arm having an extension, forming an elbow crank or lever, which is provided with a stud, on which revolves a friction roller, said stud and roller taking into a cam-groove formed in the inner surface of the driving-wheel.

The hook or looper and the feeding device are both operated by a rod hinged to the said elboW-lever. The said rod has a reciprocating longitudinal motion and a lateral motion, the former being imparted to it by the elbowlever, and the latter by means of a stud or projection on the said rod working in an oblique cam-slot in a plate arranged under the cloth -plate of the machine. The said rod passes through a hole in the looper, and by its lateral motion imparts to the said looper the necessary vibratory movement. The feedbar has a curved slot, through which the said rod passes,` and imparts to the said bar an upward, forward, and downward movement, the return motion being effected by a spiral spring working in a longitudinal slot in the said bar.

Figure l is a side elevation of my improved machine. Fig. 2 is a plan of the same with the cloth-plate removed. Fig. 3 is an end elevation of the saine.

Like letters indicate like parts in all the figures.

partly by dotted lines, Fig. 1,) which forms an elbow crank or lever. This elbow-lever is provided with a studb', on which turns a friction-roller, b", the said stud and roller taking into a cam -jgroove, c, formed in the inner surface of the driving-wheel G, which is arranged parallel with the arm B. The driving-wheel O being pnt in motion by the handle C', it imparts an oscillatin g motion to the elbow-lever B', thus causing the arm B to rock upon its fnlcrum 11,"andproduce the vertically-reciprocating motion of the needlebar A.

The hook or looper D, pivoted to the frame of the machine at d, is 'operated by the rod E, which is hinged to the elbow-lever B' at e. This rod E has two motions-la reciprocating longitudinal motion, imparted to it by the oscillation of the elbow-lever B', and a lateral motion, which is given to it by a stud or projection, e', working in an oblique slot, f, formed in the plate F. The forward end of the rod E passes through a hole in the looper D, as

shown in Fig. 3, and by its lateral motion imparts to the said looper the necessary vibratory movement on its pivot d.

The feed-bar Gr is operated by the rod E, workin g in the curved slot g in the said bar.

The vibratory movement of .the looper D imparts to the rod E a curvilinear motion, which causes the said rod to impart tothe feed-bar G an upward, forward, and downward movement, the return movement being eiiected by the spiral spring H. The portion` g' of the feed-bar G works in a slot formed in the frame of the machine, (see Figs. 1 and 2,) thus preventing any lateral displacement of the feedbar.

The length of stitch is regulated by the screw I, which sets against the feed-bar G, as shown in Fig. 3.

I claim as my invention- 1. The elbow-lever B', actuated by the camwheel C, combined with the rod E, provided with a stud, e', working in an oblique slot, f, whereby reciprocating and lateral movements are imparted to said rod E.

2. The combination of the looper D with the rod E, passing through said looper, whereby the reciprocating and lateral motions of said rod impart the necessary vibratory motion to motion imparts to the feedbar G im upward,

said looper, substantially as set fort-h. forward, and downward motion, as set fort-h. 3. The feeding device Gr, having a curved 1 slot, g', and the rod Epassing through saidl FENNLR BALLOU TAYLOR" [L' 5'] curved slot in said feed-bar G, said rod E Vtnesses:

having a curvilinear motion imparted to it THOMAS NIGHTINGALE PALMER,

by the looper as it vibrates on its axis, which l HENRY JAMES FARLOW.

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