US2179498A - Stop motion for twisting machines - Google Patents

Description

Nmr. M, H939. E. R. DUNCKLEE El AL 2.179.498

STOP MOTION FOR TWISTING MACPIINES Filed Dec. 20, 1937 INVENTOR$ E/F. Danie/nee.- 8 CM JHcLaaN BY 7 fl%zy/ ATTORNEY Patented Nov. 14, 1939 UNITED STATES STOP MOTION FOR TWISTING MACHINES Elmer R. Duncklee, Mystic, Conn., and Cecil M.

Sheldon, Westerly, R. 1., assignors to The Al;- wood Machine Company, Stonington, Conn., a corporation of New Jersey Application December 20, 1937, Serial No. 180,720

4 Claims.

This invention relates to textile machines and particularly to means to promptly stop operation of one of the operating units of the machine when a thread breaks.

The stop mechanism forming the present invention is applicable to winding and twisting machines and is shown, in the embodiment selected for illustration, in a doubling and twisting machine of standard construction and design.

An object of the invention is to provide improved drop wire means operative to stop the winding and twisting operation at one of the spindles or units of the machine when one of the individual threads breaks prior to being twisted with the other threads, or, when the completely doubled and twisted thread breaks.

One feature of importance and which enables the above object to be accomplished is that in addition to the usual individual drop wires for the threads being twisted into a single strand there is provided another drop wire engaging the complete or composite thread after the strands thereof have been at least partially doubled and twisted together.

And another object of the invention is to provide a drop wire engaging and adapted to be actuated by breaking of the composite thread actuation of this latter drop wire serving to operate the same stop mechanism as the actuation of any drop wire when any of the individual threads forming the composite thread may break.

And finally, it is an object of the present invention to form the drop wire for the complete or composite thread in the form of a pivotally mounted wire having a thread guide at one free end and at its opposite end is interlooped with a bar or rod extending substantialy vertically and engaging a member of the stop motion, the pivotal bearing for the wire being preferably mounted on the housing for the feed mechanism.

With the above and other objects in view the invention includes the features of construction and operation set forth in the following specification and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of this specification, we have shown the invention embodied in a doubling and twisting machine for silk, rayon or other fine fibrous material but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Fig. 1 is a side elevation of a unit mechanism bf a doubling and twisting machine provided with the present invention.

Fig. 2 is a front elevation of some of the parts shown in Fig. 1, and

Fig. 3 is a detailed isometric view of the secondary drop wire and its connecting member to the stop mechanism.

In the above mentioned drawing there has been shown but one embodiment of the inven-- tion which is now deemed preferable, but it is to be understood that changes and modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Briefly, and in its preferred aspect, the invention may include the following principal parts: delivery spools, thread guiding means, feed mechanism, usual or conventional parts of a twisting or other textile machine, individual drop wires for eachthread being operated on engaging the threads before they reach the feeding means, a separately mounted drop wire engaging and being heldin operative position by the tension of the thread after passing the feeding means, tripping means operated by falling of the secondary drop wire or one of the drop wires for the individual strands when either an individual thread or the com posite thread breaks, and stopping means operated by these tripping means to stop operation of the unit mechanism.

Referring more in particular to the drawing we have shown an embodiment of the invention incorporated in a standard doubling and twisting machine for silk, rayon, etc. Theads from a plurality of spools I pass down over suitable guide rolls H and through eye l2 to a feed wheel l3 suitably driven at a predetermined speed by suitable driving means forming no part of the present inventio'n. Between the guide rollers II are mounted the usual drop wires 9 there being one of these wires for each of the strands, and each wire is provided with an eye or loop at its outer end through which one of the strands passes. The feed wheel i3 is supported for rotation upon a vertically movable rod i4 and a driving gear l5 for the feed wheel [3 meshes with a gear I 6 on a main driving shaft ll. As these latter parts form no part of the present invention they will not be further described.

After passing around the feed wheel l3 the strands being twisted pass through a loop or eye IE on a pivotally mounted wire I 9 from which they pass to the ring traveller 2i] and on to the take up bobbin 2! in the usual manner.

The vertically movable rod i4 is held in its lower or operative position by a latch 22 of standard construction and upon releasing or disengagement of this latch the rod l4 moves upward and disengages gear i5 from its driving gear It.

To operate this latch movement of any one of and take up spools forming the the drop wires 9 to its position indicated by dot and dash lines moves an arm 24 on the drop wire to a position to cause oscillation of pivotally mounted lever 25 supported at an intermediate point on the lower end of latch member 22. In its oscillated position'the rear end of the lever 25 intercepts the path of movement of a constantly oscillated arm 28 so that the latch member 22 is forced laterally to its disengaging posi- The operation of these individual drop wires 9, one of which is provided for each strand being twisted, is well known. These drop wires do not operate however in the event of. breakage oocurring between the feed wheel l3 and the take .the combined or twisted strands occurs the wire i9 is oscillated to the position shown in dot and dash lines, this movement being due to the wire I9 having its rear end weighted by a vertical baror wire 29 flexibly attached thereto.

Preferably and as shown in Figs. land 3 the lower end of rod 29 and the rear end of wire l9 are formed into loops so that theseends may be loosely inter-engaged and retained in proper relative position. By means of this looped connection and the weight of the rod 29 this rod drops a short distance when the wire l9 oscillates upon breakage of the combined threads. Movement downward of rod 29 may be facilitated by a small supplementary weight 30 which may be secured to the rod. Also guiding means for this rod may be provided in the form of a short arm 3| outstanding from the vertical rod l4 and having a suitable opening adjacent its free end through which the rod 29 may extend at an intermediate point.

The upper end of the rod 29 is bent substantially at right angles as at 32. This upper bent end 32 of rod 29 engages over pivotally mountedmember 25 so that when rod 29 drops the member 25 will be oscillated to actuate the trip mechanism 22 and allow the rod M to lift the feed mechanism to an inoperative position.

As shown most clearly in Fig. 3 the wire 19 may be formed from a single piece, the intermediate portion being circularly bent or coiled to form a transverse opening by means of which the stud 21 centrally engages the wire. The lower end of rod 29 is coiled and interlooped with the coiled rear end of wire i9 so that the contiguous ends of the wire l9 and rod 29 may be joined for free pivotal movement relative to each other. Whenever a thread breaks either before or after passing the feed wheel l3 the member 25 may be oscillated to promptly release the latch 22 and stop operation at that unit. Also when the combined strands or composite thread breaks below the feed wheel l3 and the drop wire l9 operates the drop wires 9 for the individual strands remain in place and the threads above the feed wheel are not in any way interfered with.

We claim as our invention 1. A stop motion for textile doubling and twisting machines comprising in combination, threadfeeding means, a housing therefor, a latch, member for retaining said feed means in operative position, drop wires engaging individual threads being operated on, trip mechanism actuated by downward movement of a drop wire to render said feed means inoperative, a drop wire pivotally supported on said housing engaged by the combined threads after passing the feed means, a vertically disposed rod connected pivotally to said last mentioned drop wire, and means connecting said last mentioned drop wire to the trip mechanism actuated by said first mentioned drop wires, whereby a break in the combined threads will render said feed means inoperative.

2. A stop motion for textile doubling and twisting machines comprising in combination, thread feeding means, a housing therefor, a latch member for retaining said feed means in operative position, drop wires engaging individual threads being operated on, trip mechanism actuated by movement of. a drop wire to render said feed means inoperative, a drop wire pivotally supported on said housing engaged by the combined threads after passing the feed means, a vertically disposed weighted rod having its lower end connected to the rear end of said last mentioned drop wire and actuating said last mentioned drop wire when the combined threads break, said means connecting said last mentioned drop wire to the trip mechanism actuated by said first mentioned drop wires, whereby a break in the combinedthreads will render said feed means inoperative. v

3. A stop mechanism for textile doubling and twisting machines comprising in combination, a feed mechanism for advancing a plurality of threads from individual spools to a single take up spool, a housing therefor, individual drop wires engaging the separate threads between said spools and said feed mechanism, a constantly actuated tripping member, means operated by said .member to disengage said feed mechanism when a thread breaks and a drop wire fails, a drop 4 wire pivotally supported on said housing engaging the doubled and twisted threads after passing said feed mechanism, and a weighted rod pivotally engaging said last mentioned drop wire and actuating said last mentioned drop wire when said combined threads break, said rod being connected to said feed disengaging means,

whereby when said combined threads break the feeding mechanism will be rendered inoperative.

4. A stop motion for textile doubling and twisting machines comprising in combination, thread feeding means, a housing therefor, a latch member for retaining said feed means in operative position, separate drop wires engaging indivldual threads being operated on, trip mechanism actuated by downward movement of any of said drop wires to render said feed means inoperative, a drop wire pivotally supported on'

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