US2035253A - Tension device - Google Patents

Description

March 24, 1936. A. A. ARNOLD TENSION DEVICE Filed July 23, 1935 vxNvEN-ron Patented Mar. 24, 1936 UNITE STATES PATE QFFICE TENSION DEVICE Arthur A. Arnold, Pottstown, Pa., assignor of onehalf to Harry Sarfert, Philadelphia, Pa.

The present invention relates to thread spinning or throwing mechanism and more particularly to a novel device for maintaining a desirable tension upon threads.

Tension devices of the character to which this invention relates have heretofore generally consisted of a spiral wound wire having a vertical length about which the thread is looped and two ends, one of which is seated in a hole in the wooden mounting rail and the other of which is made fast by a screw entering such rail. Since it is necessary to remove and replace these tension devices in order that different kinds of thread may be worked, or for different twisting of threads, the holes in the rail become worn and enlarged. The result is the tension devices Work loose, the tension varies, and much trouble develops in consequence.

Some of the objects of the present invention are to provide an entirely new and efficient tension device and mounting therefor; to provide a tension member wherein friction of the moving thread is reduced to a minimum; to provide a tension member wherein variation in the thread tension can be made while the thread is feeding; to provide a mounting for a tension device which becomes a iiXed permanent attachment to the tension support rail; to provide a tension mounting wherein provision is made for changing from one tension device to another without removing the mounting from the part to which it is attached; to provide a novel removable and replaceable tension mechanism; and to provide other improvements as will hereinafter appear.

In the accompanying drawing Fig. 1 represents a perspective of a portion of a thread spinning machine equipped with a tension device embodying one form of the present invention; Fig. 2 represents a perspective of the base or support of the tension device; Fig. 3 represents a section on line 3 3 of Fig. 2,' Fig. l represents a section on line @-4 of Fig. 2; Fig. 5 represents a plan of one form of tension device particularly for left hand twisting; Fig. 6 represents a front elevation of the tension device ci Fig. 5 connected tothe base or mounting; Fig. 7 represents a front elevation of the form of tension device, for rise with right hand twisting, connected to the novel base or mounting; and Fig. 8 represents a plan of the base or mounting used as a support for a thread guide of ordinary construction.

Referring to the drawing one form of the present invention consists of a base I arranged to support and hold a tension member H for use where the thread twist is to the left, or a tension member l2 for use where the thread twist is to the right, or a centering guide I3 for a straight run of thread. The base H9 in the rpreferred form comprises a substantially cube-shaped body lli having flanges i projecting from two opposite sides to provide suitable areas for holes' IB through which screws I1 or like fastening can be passed to permanently secure the base I0 in its proper position upon the rail I8 of the twisting machine. It is to be understood that one such base I0 is fixed to the rail opposite each take-up roll 2S. The body I4 is provided with a through bore 2i extending from one side thereof to the other and having its ends opening respectively into two face grooves 22 and 23. Each of these grooves extends from the iront of the body lli to a point beyond where the bore 2i is met, and the size of each groove is such as to snugly receive and seat the supporting leg of the complemental tension device. A socket 24 is bored into the body lli from the front and intercepts the bore 2l at a point coincident with a threaded hole 25, so that a set screw 26 becomes a common fastening means for any one of three different devices used one at a time.

The tension member l l consists of a wire having one end in the form of a straight leg 21 and the other end in the form of a free end half loop 23, While the intermediate portion is in the form of a downwardly tapering spiral 3D. The leg 2l is turned in the direction such that when it is within the bore 2l the wire seats in the groove 22. The convolution of largest diameter joins the leg 2l by a length 3| and the successively smaller convolutions extend downwardly Well below the plane of the leg 21 to ultimately form a guide loop 32 from which the thread receiving shank 33 rises in reverse direction. Preferably the shank 33 extends upwardly through the spiral 36 and at an angle to its axis so that the thread 29 enters and leaves the tension device at points out of direct alinement. This angular inclination of the shank 33 to the direction of thread feed permits the thread to ride back and forth as the tension varies so that the thread has less frictional wear than when feeding about a Wire which coincides in direction with the direction of thread feed. Furthermore since the half loop 28 terminates in a free end it is possible to change the number of Wraps about the shank 33 at will, While the machine is in operation. The tension member l2 is formed just the reverse from the member Il but embodies all of the novel features of construction described in connection with the member Il. Its leg 34 therefore turns in the direction to enter the bore 2| from the side necessary to seat the wire in the groove 23. 'Ihe shank 35 is inclined with respect to the direction of travel of the thread for the purpose above described. Repetition of the description as to the spiral and other'details are believed unnecessary.

In Fig. 8 the base ID is shown receiving and supporting a centering guide 36 of usual shape, which is held in place by the same set screw \26 used for holding a'tension device when such described my invention, I

to hold said wire end in said bore, and means to fasten said body to a xed part of a thread spinning machine.

2. A base support for a tension device consisting of a body having a bore therethrough and two grooves respectively at opposite sides of said body communicating with said bore, said grooves lying in a horizontal plane intercepting said bore, means to hold one end of either of two tension wires in said bore whether the Wire is in one or the other of said grooves, and means to fasten said body to a xed part of a thread spinning machine.

3. A base support for a tension device consisting of a body having a bore therethrough, two grooves respectively at opposite sides of said body communicating with said bore, and a hole communicating with said bore, said grooves lying. in a horizontal plane intercepting said bore, said bore and one groove serving to seat antension wire, and said hole serving to seat a thread guide, a fastening means arranged to clamp a wire in either said bore or hole, and means to fasten said body to a Xed part of a thread spinning machine.

ARTHUR A. ARNOLD.

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