US1429520A

US1429520A - Sewing machine

Info

Publication number: US1429520A
Application number: US252968A
Authority: US
Inventors: William C Meyer
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1916-05-06
Filing date: 1918-09-06
Publication date: 1922-09-19
Anticipated expiration: 1939-09-19
Also published as: US1355159A; US1391398A

Description

w. c. MEYER.

SEWING MACHINE. APPLICATION FILD SEPT- 6. 1918- 1,429,520. Patented Sep 19, 1922.

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w. c. MEYER.

SEWING MACHINE.

APPLICATION FILED SEPT- 6 IBIS.

Patented Sept. 19,1922.

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WILLIAM C. MEYER, OF BEVERLY. MASSACHUSETTS, ASSIGNOR TO UNITED SHOE llIACEINERY CORPORATION, OF PA'IERSON, NEW JERSEY, A CORPORATION OF NEW' JERSEY.

SEWING MACHINE.

Original application filed May 6, 1916, Serial No. 95,893. Divided and. this application filed September To all whom/it may concern:

Be it known that I, WILLIAM C. MEYER, a citizen of the United States, residing atBeverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Sewing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present machine relates to sewing machines and more particularly to thread cutting and grippin devices for severing the thread between the machine and the work when a seam has been completed and for holding the free end of the thread projecting from the thread handling devices dur ing the formation of one or more stitches at the beginning of the sewing of a seam.

The invention is designed particularly to be applied to wax thread sewing machines and is illustrated in this application as embodied in a machine of this class but is not limited in its application to this class of machines.

The objects of'the invention are to improve the construction and mode of operation of thread cutting and gripping devices of the above type and to produce such a thread gripping device in which the thread may be more quickly and easily inserted be tween the thread gripping jaws and severed than could be done in such thread cutting and'grippingdevices heretofore devised.

lVith these objects in view the inventor contemplates as a feature of the invention the provision of means for controlling and relatively actuating-the jaws of the gripping device so as to cause the same to lie relatively in open positions to receive the thread when the work is removed from the machine and to lie in closed position so as to grip the threa-d during the formation of at least the first stitch, upon starting the machine. lVith the jaws lying in open position when the work is removed from the machine, the thread intermediate the work and the stitch forming device may be quick ly and easily inserted between the thread gripping jaws in proper position to be engaged by the jaws when they are closed. In the preferred form of the invention the aws Serial No. 252,968.

of the gripping device are opened to receive the thread upon stopping the machine, and are closed to grip the thread as the machine is started.

Other features of the invention consist of certain novel and improved constructions, arrangements and combinations of parts hereinafter described and particularly pointed out in the claims, the advantages of which will be obvious to those skilled in the art.

The features of the invention will be read ily understood from the accompanying drawings illustrating a machine embodying the invention in its preferred form and the following detailed description of the constructions therein shown.

In the drawings, Figure l is a View in side elevation of an inseam shoe sewing machine embodying the invention looking from the left side of the machine; Fig. 2 is a detail view in side elevation illustrating particularly the thread gripping and cutting devlces; Fig. 3 is a detail plan viewillustrating the parts shown in Fig. 2, with the portion of the frame to which they are attached omitted for the sake of clearness, and Fig. 4 is a view in front elevation of the construc tion shown in Fig. 2.v i

The machine illustrated in the drawing is an inseam shoe sewing machine of. the type ordinarily employed in sewing welts and upper to the insoles of lasted shoes. This machine is provided :with a curved hook needle, a curved work feeding a-wl and 'a ward rotation of. the shaft, then to impart a reverse rotation thereto, and finally to bring the shaft to restin a predetermined position. A construction and mode of operation of all of the parts of the present machine above briefly described are the-sameas the corresponding parts of'the machine illustrated and described in applicantsco-pending application, Serial No. 95,893, filed May 6, 1916, of which the present application constitutes a division.

The devices for severing the thread between the machine and the work upon the completion of a seam and for holding the free end of the thread after, the thread is severed, in the machine illustrated in the drawings, comprise a fixed thread cutting knife and a thread gripping device provided with relatively movable thread clamping jaws which are opened to receive the thread upon stopping the machine and which are closed upon the thread to grip the same as the machine is started. In the construction shown, the thread gripping device comprises a fixed gripping aw 5 carried by a plate'6 secured to the machine frame, and a movable gripping aw 8 carried by a block 10 secured to a longitudinally movable slide rod 12. The thread gripping jaws are located above and to the left of the looper and thread arm in convenient position for the operator to place the thread between the jaws by a simple, easily eXcuted movement of the shoe after the shoe is disengaged from the machine; The fixed aw is provided with a hooked end ll to catch the thread leading from the looper across the underside of the thread arm to the shoe as the shoe is moved forwardly, and thus assist the operator in placing the thread between the aws.

The rod 12 is moved rearwardly to open the thread gripping jaws upon stopping the machine by means of an arm 16 carried by a sleeve 18. The arm 16 is formed with a slot 20 in which engages a pin 22 mounted on the rear end of the slide rod 12. As the direction of rotation of the main shaft is reversed upon stopping the machine, the sleeve 18 is rocked in a direction to swing the arm 16 rearwardly to retract the slide rod '12 and thereby open the thread gripping jaws. The sleeve 18 is locked in the opposite direction as the machine is started and the slide rod 12 is then advanced to carry the movable thread gripping jaw 8 toward the fixed jaw 5 by the action of a coiled spring 24L attached at one and to the slide rdd 12 and at the other to anarm of a bell crank lever 26 pivoted at 28 on the frame of the machine. The other arm of the bell crank lever 26 carries an abutment screw 30 arranged to engage an abutment 32 on the frame. The tension of the spring 24- may be adjusted by the adjustment of the abutment screw 30 in the arm of the bell crank. The adjustment of this screw regulates the pressure of the movable jaw 8 of the thread clamping device on the thread and thus regu lates the tension exerted. by the clamping device upon the thread during the formation 'of the first few stitches.

The sleeve 18 is rocked in a dirction to swing the arm 16 rearwardly by the movement of a lever 36 pivoted on a stud 38, one

i ieaaeo machine, and is allowed to move rearwardlyto its normal position upon starting the machine. The sleeve 18 is rocked in the opposite direction by means of a coiled spring 62 connected at one end to the forward end of the arm l l at the other to a point on the frame of the machine.

The thread cutting knife is indicated at 54 and is mounted on the frame so that its cutting edge lies above and forwardly of the thread gripping jaws, as shown in Figs. 2, 3 and l. The knife edge is located relatively to the gripping aws so that a sutficient length of thread will be left projecting beyond the gripping jaws after the thread is severed for the formation of at least the first stitch at the beginning of a seam. This location of the knife relative to the gripping jaws will insure that the thread will not be pulled from between the gripping jaws until after the first stitch has been completed. The knife is secured to the frame by means of a bolt 56. Obviously upon loosening the bolt 56 the knife may be adjusted about the bolt toward and from the'thread gripping aws.

lVith the above construction and arrangement of the thread gripping jaws and the thread cutting knife, the thread may be very easily and conveniently inserted between the gripping jaws and severed. After the machine has been stopped at the completion of a seam formation, the thread gripping jaws then lying relatively in open positions, the operator, after disengaging the shoe from the channel guide, inserts the threadv be tween the thread gripping jaws and severs the same by first moving the shoe to the left and upwardly and then moving the same forwardly and slightly to the right. The movement of the shoe to the left and upwardly will draw the thread across the lower side of the thread arm andagainst the left side of the block 10, and the movement of the shoe forwardly and to the right will carry the thread between the jaws of the gripping device and over the thread cutting knife.

Having explained the nature and the invention and having specifically described a machine embodying the invention in its preferred form what is claimed is:

object of 1. A 'inseam shoe sewing machine hav- I ranged to receive the thread as the shoe is removed from the machine by the operator and to hold the free end of the thread under tension during the first part of a seam formation and means for controlling and relatively actuating the jaws of the gripping device to cause the same to lie relatively in open positions to receive the thread when the work is removed from the machine and to lie in closed positions so as to grip the thread during the formation of at least the first stitch upon starting the machine.

2. An inseam shoe sewing machine, having, in combination, stitch forming devices, a thread gripper arranged to receive the thread as the shoe is removed from the machine by the operator, and means for opening the gripper to receive the thread upon stopping the machine.

3. An inseam shoe sewing machine, having, in combination, stitch forming devices, a thread gripper, arranged to receive the thread as the shoe is removed from the machine by the operator, means for opening the gripper to receive the thread, and mechanism for closing the gripper to grip the thread upon starting the machine.

at. An inseam shoe sewing machine, having, in combination, stitch forming devices, a thread gripper arranged to receive the thread as the shoe is removed from the machine by the operator, and means for opening the gripper to receive the thread upon stopping the machine and for closing the gripper to grip the thread upon starting the machine.

5. A sewing machine, having, in combination, stitch forming devices, a cam shaft, a thread gripper, and means controlled by the reversal of the cam shaft for opening the gripper to receive the thread.

6. An inseam sewing machine, having, in combination, stitch forming devices, a cam shaft, a thread gripper, means controlled by the reversal of the rotation of the cam shaft for opening the gripper, and means for closing the gripper upon starting the machine.

7. A sewing machine, having, in combination, stitch forming devices, a thread gripping device comprising thread gripping jaws arranged to engage the free end of the thread to hold the thread under tension and to allow the thread to slip between the jaws under the strain exerted thereon by the stitch forming devices during the first part of a seam formation, a thread cutting knife for severing the thread between the grip ping device and the work, and means for securing the parts in position arranged to permit a relative adjustment of the gripping device and the knife toward or from each other to vary the length of thread left projecting beyond the gripping jaws after the thread is severed by the knife.

WILLIAM C. MEYER.