US265686A

US265686A - macaulay

Info

Publication number: US265686A
Authority: US
Publication date: 1882-10-10
Anticipated expiration: 1899-10-10

Description

(No Model.) 3 Sheets-Sheet 2.

T. A. MACAULAY.

SEWING MACHINE. No. 265,686. Patented 0ot.10, 1882.

WITNESSES: INVBNTOR. 3d N9/m Mw@ E ATTORNEYS.

T.A.MA0AULAY SEWING MACHINE.

Patented 00L 10,1882.

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UNITED STATES PATENT OEEIcE.

THOMAS A. MACAULAY, OF NEW YORK, N. Y.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 265,686, dated October 10, 188.2. Application led July 1, 1882. (No model.)

To all whom it may concern:

Be it known that I, THOMAS A. MACAULAY, of the city, county, and State of New York, have invented certain new and useful Improvements in Sewing-Machines, of which the following, with the accompanying drawings, is a specification, which will enable others skilled'in the art of making sewing-machines to make and use the same, reference being had to the accompanying drawings, forming part of the same.

My invention relates to that class of sewingmachines in which an eccentric on the main shaft by intervening mechanism oscillates a rock-shaft for operating a shuttle or hook and revolves a feed-operating shaft; also, to an improved device for changing the length of the stitch, which will lbe hereinafter more fully described.

In the drawings, Figure 1 is a sectional side elevation. Fig. 2 is au end view of Fig. 1 through the line or x. Fig. 3 is a plan view of Fig. 4 is an enlarged view of parts of the feed-operating mechanism shown in Fig. 1; Figs. 5 and 6, detail views of the feed mechanism. Fig. 7 is a view showing the usual form of cam for operating the feed. Y

A is the main shaft. B is an eccentric thereon. O O is a pitman-lever. D is a revolving feed-shaft. D D are bearings for the feedshaft. E is a crank on the feed-shaft. i" is a link-pin. F isa link. Gr is a link-pin. H H is a bell-crank lever. J is a rock-shaft. l is a rock-shaft arm. K is a pin in the long armof the bell-crank. K' is a. slot in the arm I. L L are projections from the bed, and have bearings for the `rock-shaft J. M is an arm carrying the shuttle N. O is a cam-pin on the front end of the shaft D. O is an extension of O. .P is the feed-bar. R is a slotted projection from the rocking lever S. T is a stitchregulating lever. V is a stud by which the rocking lever S is pivoted to the bed-plate. a is a spring-brake forked and tting into a groove on the shaft or stem d. c is a crankpin. b is a milled headed thumb-nut fitting into a countersink on the top side of the bedplate.

Motion being given to the main shaft Athe eccentric B imparts motion to the pitinaulever O C, whichrevolves the feed-shaft D at the same time it rocks the bell-crank lever H H', which in turn rocks the rock-shaftJ through the arm I. This rock-shaft has a shuttle-carrying arm, M, which has a shuttle, N, and operates in a vertical plane. The feed-shaft D is provided at its front end with a double campin, O O', ot' the usual construction, which enters a slot in the feed-bar I), and gives to it its vertical motion through the portion O, while the portion O of the cam-pin enters a slotted projection, R, of the rocking lever S, which is provided with another slot, i. A pin, fi, from the stitch-regulatin g lever T enters this slot i', and the motion of the rocking lever S is imparted to the lever T, which is pivoted by pin It to an extension-lug, e, of the feed-bar P, thereby imparting the motion of the rocking lever S to the feed-bar l?. The length of stitch is regulated by turning the milled head b, which is connected to shaft d, having a crank-pin, c. This crank-pin c enters a slot, s, in the rear end of the stitchregulating lever T, and, as the motion of the rocking lever S is greatest at its end farthest from its center of motion the motion of the feed-bar P is long or short as the pin i of the feed-regulatin g lever T is near or far from the center ot' motion of the rocking lever S. The bell-crank lever El H is shown as connect-ed to the arm I above the shaft J, but it may be connected below it. This lowerconnection will permit a greater axial motion of the shaft J.

It is obvious that the feed mechanism may be4 placed in other positions as well as in the .one shown without departing from the spirit H H with the main shaft A, eccentric B, and I pitman-lever C O, and with the crank-arm` I and rock-shaft J, substantially as set forth.

2. The combination of the shaft D, cam-pin O O', feed-bar P, rocking lever S, regulating- IOO lever T, havin g the slot s,.and crank-pin @upon regulatinglever T, having the slot s, shaft d,

the shaft d, substantially as described. having the crank-pin c, and feed-bar P, sub- 1o 3. The regulating-lever T, having the slot s, stantially as described.

and the shaft d, having crank-pin c, in combi- 5 nation with the feed-bar P and devices for op- THOS A' MAQAULAY erating the same through the lever` T, substan l Witnesses: tially as set forth. J. S. BROWN,

4. The combination of the slotted lever S, HENRY A. HOLT.