US261161A - Feed mechanism for sewing-machines - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

O. KORUP & J. MQGILL.

FEED MECHANISM FOR sn'wme MACHINES.

No. 261.161. Patented July 18, 1882.

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O. KORUP & J. McGILL.

FEED MECHANISM FOR SEWING MACHINES.

No. 261,161. Patented July 18, 1882.

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' .UNITED STATES PATENT ()FFICE.

.OTTO KORUP AND JAMES MOGILL, OF CHICAGO, ILLINOIS.

FEED MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 261,161, dated July 18, 1882.

Application filed August 9, 1881. (No model.\

To all whom it may concern:

Be it known that we, Orro KoRUP and JAMES MCGILL, of the city of Chicago, in the State of Illinois, have made certain new and useful Improvements in Stitch-Regulators for Sewing-Machines, of which the following is the specification, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Only such parts of the sewing-machine are represented in the drawings as will illustrate our invention.

Figure 1 shows a cross-section of a sewingmachine just in front of the drive-wheel, showing the connections between the driving-shaft and the operative parts immediately below the table of the machine. Fig. 2 is a view of the under side of the machine, showing the working of the feed-motion and the shuttle movement. Fig. 3 is a cross-section of lever J through line or a, Fig. 2. Fig. 4is a perspective view of the sliding bar and fulcrum-arm. Fig. 5 is a perspective view of the fulcrum block. Fig. 6 is a view of a bolt, used as shown. Fig. 7 is a view of the connection between the feed-bar and rocking shaft.

The object of this improvement is to provide a safe, cheap, and positive feed-regulator.

Similar letters of reference refer to similar parts in the different figures.

A is the driving-shaft of the machine, from which all the operative parts of the machine receive their motion. On this shaft are the eccentrics B, C, and D, and they workrespectively the following rods and their lowerend connections: B works the rod E, which works the lever J, to which it is loosely attached at one end. C works the rod F, which works the shuttle-bar I. 1) works the rod H, which works the rocking shaft K.

J is a lever loosely attached at one end to the arm L. This arm L is attached rigidly to the shaft M. The leverJ works on the adjustable fulcrum-block N, which is attached to the arm R of the sliding bar 0. This sliding bar 0 is pushed forward and back by means of the set-screw P, thus moving the fulcrumblock N in the slot Q at pleasure. The fulcrum-block N has a peculiar construction. The arm It, extending from the sliding bar 0, has a mortise in it, through which passes the lever J, as shown in Fig. 3. The fulcrumblock N is made in two parts, S S, Figs. 3 and 5, each part having a projection extending into the slot Q of the lever J, as shown in Figs. 3

and 5.

The bolt T passes through the two sides and their projections through the slot Q, which holds the two pieces together and forms the fulcrum-block N. The short bolts to it pass through the sides of the arm R and into the fulcrum-block N near the end opposite to the bolt T, as shown in Figs. 3 and 5, and form the pivoting-point of the fulcrum-block. As the set-screw Pis moved backward or forward the fulcrum-block N is moved accordingly, and when the short bolts to a register with the pin '0, then the movementot' the feeder is neutral, as the shaft M does not vibrate, and in proportion as. the fulcrum is moved away from the pin 21 in such proportion does the shaft M vibrate. At the opposite end of the shaft M is a short arm, a, Fig. 7, reaching out at right angles with the shaft M, and to this short arm is loosely attached the feed-bar \V. As the shaft M is vibrated a greater or less degree by moving the fulcrum-block N, as above described, in such proportion does the feeder-bar W travel backward and forward across the bed of the machine under the needle, and thus regulates the stitch. One end of feed-bar WV is forked, which fork embraces a short arm, Y, extending from end of shaft K, and as the shaft K is rocked the forked end of the feedbar is raised and lowered vertically. It will be observed that as the eccentric B revolves an up-and-down motion is communicated to the end of lever J, which, revolving upon the pivotal point of the fulcrum-block N, causes the shaft M to rock in proportion as the fulcrum-block is removed from the pin c.

We claim 1. The combination of the main shaft A, pitman-rod E, and lever J, having for its fulcrum the block N, pivoted in the slotted arm It of the sliding bar 0, with rock-shaft M, having the arms L and a and the feed-barVV, substantially as shown and described.

2. The combination of the sliding bar 0, having the downwardl y-projectin g arm It, provided with a slot, with the lulcrum-block N, pivoted within the said slot, and the lever J, embracing the said fulcrum-block bymeans of the slot Q, said lever being connected at one end with the pitman-rod E and at the other end with the arm L of the rock-shaft M, substantially as set forth.

. OTTO KORUP.

Witnesses: JAMES MOGILL.

WALLAoE MoGILL,

A. A. HOWARD.

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