US872745A - Awl-feeding mechanism for sewing-machines. - Google Patents

Description

No 872,745 PATBNTED DEC. 3, 1907.

o. PEDERSEN. AWL FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION rum) MAR. '1, 1907.

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No. 872,745. PATENTBD DEC. 3, 1907.

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AWL FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MABHI, 1907.

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W Ohvisbian Padevsen @412 M UNITED STATES PATENT OFFICE.

CHRISTIAN PEDERSEN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO LANDIS MACHINE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

AWL-FEEDIN G MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed March 7, 1907. Serial No. 361.091.

T 0 all whom it may concern:

Be it known that I, CHRISTIAN PEDERSEN, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Awl-Feeding Mechanism for Sewing-Machines, of which the following is a full, clear, and exactde scription, such as will enable others skilled in the art to Which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure lis a perspective view illustrating an awl-actuating mechanism embodying the features of my invention;Fig. 2 is an enlarged front elevation of the parts shown in Fig. 1; and Fig. 3 is a sectional view taken on the line 33 of Fig. 2.

This invention relates to sewing machines and particularly to that type of machines which are used in the manufacture of boots and shoes and which are provided with a curved awl that moves upwardly through the work to form an opening for the needle and also to feed the work laterally.

The object of the invention herein described is to provide an awl-actuating mechanism of simple construction that will cause .the awl to feed the work positively and for the same distance at each operation of the machine. 7

Another object of my invention is to provide an awl-actuating mechanism having a simple form of adjusting mechanism for varying the degree of lateral movement of the awl.

Referring to the drawings which represent the preferred form of my invention, 1 designates a curved awl mounted on an awl-carrier 2 that is pivotally connected at 3 to the upper end of a rock arm 4. The awl is arranged underneath the work-table 5 and is forced upwardly through the work and retracted thereform by means of a lever 6 pivoted at its rear end to a stationary part of the frame of the machine and provided with a roll 7 that travels in a cam groove 8formed in the side face of a cam block 9 secured to the main shaft 10 of the machine, the front end of the lever 6 being connected to the awlcarrier by means of'a yoke-shaped device 11 provided with a horizontally disposed pin 12 that extends through an opening in a rearwardly extending arm or portion 13 of the awl-carrier, this awl-carrier, as shown in Fig.

1, being of substantially bell crank lever form.

Lateral movement is imparted to the awl after it has penetrated the work for the purpose of feeding the work by the movement of the rock arm 4 to which the awl-carrier is connected. The shaft to which the rock arm 4 is connected is provided with an arm 14 arranged approximately at right angles to the arm 4 and having'an elongated slot 15 in which a connection block 16 is adjustably mounted. This adjusting block travels in a guideway formed in a rock lever 17 provided at its free end with an upwardly projecting arm 18 having a roll 19 that travels in a cam groove 20 formed in the periphery of the cam block 9. The connection block 16 is journaled on a stud 21 carried by an approximately T-shaped device 22 that has its shank arranged in the elongated slot of the arm 14, said shank being provided with a threaded portion 23 on which is mounted a wing nut 24 for the purpose of securely clamping the T-shaped member 22 to the arm 14.

The cam block 9 rotates in the direction of the arrow in Fig. 1, and the cam groove 8 therein actuates the lever 6 so that it swings the awl-carrier 2 on its pivot 3 to cause the awl to penetrate the work and thereafter be retracted to normal position. After the awl has penetrated the work the rock lever 17 is swung upwardly by means of the cam groove 20 cooperating with the roll 19 on the arm of said lever, this upward movement of the lever 17 causing the arm 14 to be rocked upwardly and thus rock the 'arm 4 to which the awl-carrier is secured,

the rearward extension or arm 13 of the awl-carrier being provided with an opening of sufficient diameter to receive the pin 12 on the yoke-shaped device 11 so that a free movement of these parts is permitted.

When it is desired to change the feed of the work, the position of the T-shaped device 22 in the arm 14 is changed so as to vary the degree of movement imparted by the rock lever 17 to the arm 4 on which the awl-carrier is mounted, the greatest degree of movement being imparted to said rock arm when the device 22 is arranged adjacent the inner end of the slot 15 in the arm 14.

The awl-feeding mechanism is so constructed that when the awl reaches the end of its lateral feed movement it will be in alinement with the needle 25, as shown in Fig. 2, the awl always coming to rest at this point irrespective of the position of the connecting block 16 on the arm 14. At such times the arm 14 and the rock lever 17 will lie parallel to each other so that the elongated slot 15 and guideway for the block 16 will be in alinement, thereby enabling the T-shaped member 22 to be adjusted into a different position if it is desired to change the length of the feed. The rock lever 17, of course, will always be moved the same distance in both directions but the rock arm 4 will be moved to the right for varying distances according to the position of the connection block on the arm 14, the distance which said arm 4 is moved to the left, however, always being the same so that the awl will'aline with the needle at the end of its lateral feed movement, as previously described.

An awl-actuating mechanism of this description comprises very few parts and is of simple construction and also enables the lateral feed movement of the awl to be changed with very little trouble.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In an awl-actuating mechanism for a sewing machine, an awl-carrier, a lever for oscillating the awl-carrier, a rock arm on which said carrier is mounted, a shaft to which said arm is connected, an arm projecting rearwardly fiom said shaft, a positively actuated rock lever adjacent said rearwardly extending arm and projecting toward the shaft to which said arm is secured, a connection block adjustably mounted on said arm, a guideway on the rock lever for receiving said connection block, and a cam block provided with cam grooves for actuating the rock lever and the lever that actuates the awl-carrier; substantially as described.

2. In an awl-actuating mechanism for a sewing machine, an awl-carrier, a rock arm on the upper end of which said carrier is pivotally mounted, a member for moving said rock arm, an actuated lever, a link connected to said lever and provided with a horizontally disposed member that engages said awl-carrier, and a rotating cam block for operating said lever to cause the awl to penetrate the work and also actuate said member to cause the rock arm to move the awl laterally; substantially as described.

3. In an awl-actuating mechanism for a sewing machine, a rock arm, an awl-carrier pivotally mounted thereon and having a rearwardly extending portion, a lever having a link connected to the free end thereof, a horizontally disposed pin on said link which extends through an opening in the rearwardly extending portion of the awlcarrier, a cam for actuating said lever to cause the awl to penetrate the work, and means for actuating the rock arm on which the awl-carrier is mounted to cause the awl to feed the work laterally; substantially as described.

In testimony whereof I hereunto a'HiX my signature in the presence of two witnesses, this fifth day of March 1907.

CHRISTIAN PEDERSEN.

Witnesses:

WELLS L. CHURCH, GEORGE BAKEWELL.

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