US2098931A - Twisting machine - Google Patents

Description

3 Sheets-Sheet 1 Nov. 9, 1937. 1. R. RowE ET Al.

TWISTING MACHINE Filed Oct. 3, 1955 E 0 WR. VR 3 W E M .,W, fr D A w 4.1%. l/ i n, Z A/w ma m- 2 2 a y Nov. 9, 1937. l. R. Rows ET Al.

TWISTING MACHINE Filed oct. s, 1955 s sheets-sheet '2 INVENTOR. v fzlgRHLue andgdwar'dg'r'd Nov. 9, 1937. l. R. RowE ET AL TwIsTINGMAcmNE Filed oct. s'. 1935 3 Sheets-Sheet C5 NVENTOR. ff'v` Rjqauze a Edzzz Patented Nov. 9, 1937 PATENT OFFICE TWISTING MACHINE Irving R. Rowe and Edward E. Bradley, Stonington, Conn., assignors to The Atwood Machine Company, Stonington, Conn., a corporation of New Jersey Application October 3, 1935, Serial No. 43,340

6 Claims.

This invention relates to twisting machines for textile yarns or threads and particularly to means for increasing the distance of thread travel between the delivery bobbins and the feed rolls and to means for promptly stopping the feed rolls whenever one of the individual threads being twisted may break.

An object of the present invention is to improve the present standard type of textile twisting machines so that the threads being twisted may be advanced to the feed rolls from the delivery bobbins prior to being twisted over a materially greater distance than standard practice, all or substantially all of this distance between the bobbins or spools and the feed rolls being available to the operator for the purpose of tying up threads that may have become broken.

Another object of the invention is to provide an improved friction brake for the feed rolls so that as soon as the stop motion usually provided on machines of this type acts to disengage the feed rolls from their driving means the rollsl will promptly stop rotating instead of continuing to rotate due to the momentum of the rotating parts.

It is also an object of the invention to provide the maximum distance possible between the drop wire of the stop mechanism and the feed rolls, in this modification the threads preferably passing over a rod or roll positioned above .the uppermost bobbin and the drop wires being located immediately below this rod or roll.

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

In the accompanying drawings annexed hereto and forming a part of this specification, we have shown our invention embodied in a standard type or form of twisting machine, but it will be understood that the invention or certain features thereof can be otherwise embodied and that the drawings are 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.

Fig. lis a fragmentary side elevation of a twisting machine, having one form of the invention applied thereto.

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

Fig. 3 is a fragmentary side elevation of a twisting machine showing a modified form of guiding means for the threads between the delivery bobbins and the feed rolls.

Fig. 4 ls a front elevation of the parts shown in Fig. 3.

Fig. 5 is a fragmentary side elevation of a twisting machine showing a still further modification of the invention; and

Fig. 6 is a front elevation of the parts shown in Fig. 5.

In the above mentioned drawings, I have shown several embodiments of the invention which are 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 our invention may include the following principal parts: first, a rack for a plurality of bobbins or spools so grouped that small numbers of these bobbins may have their threads guided adjacent each other to pairs of feed rolls arranged at spaced intervals along the machine in the usual manner; second, a plurality of spaced guiding means between the delivery bobbins and the feed rolls disposed so that there may be as long length of thread travel as possible available to the operator to facilitate tying individual broken threads; third, aexiblymounted brake adapted to frictionally and resiliently engage a feed roll, and fourth, means for applying the brake when the stop motion operates to disengage the feed rolls from their driving member and for releasing the brake from the rolls when the feed rolls are again engaged with their driving means and are started to rotate.

Referring more in detail to the figures of the drawings, there is shown the supporting rack III for one group of ends to be twisted into a single multiple strand twisted thread. Five spools or bobbins I I are shown on this rack I Il, but it will be understood that any desired number of spools II may be mounted closely adjacent each other so that their ends may be brought together and wrapped around individual pairs of feeding rolls I3 prior to being twisted and wound upon suitable spools usually mounted directly below the feeding rolls (not shown). The racks IIJ may be supported upon a wooden frame I2, there being a large number of spaced racks I0 upon the frame I2 for an entire twisting machine. The mechanism for one group only of threads will be described; it will be understood, however, that similar mechanism will be provided for each pair of feed rolls I3 on the machine. 'Ihe above described mechanism and the means for rotating the .feed rolls I3 are of the usual or well known type,

and, as they form no part of the present invention', further description will be unnecessary.

The feed rolls I3 a're rotatably supported within a housing I4 and are drivingly connected together by means of an intermediate gear I5 meshing with gears I 6 upon the extended portions of the rolls I3. The housing I4 is supported upon and movable vertically with a rod I1 forming a part of a stop motion of Well known or standard form. Immediately below the housing I4 and extending longitudinally along the machine is a shaft I8 having a driving gear I9 -thereon for each housing I4. Thisgear I9 meshes with the gear I6 on the -lower roll of a pair of feed rolls I3 when the rod I1 and housing I4 are in their lower or driving position. Movement upward of a rod I1 and housing I4 disengages the gear I6 on the lower of the rolls I3 from its gear I9 and thus stops rotation of thatggarticular pair of rolls I3. As the rolls I3 after disengagement from their driving gear I9 may continue to rotate due to their momentum which would continue the feeding of the threads to the twisting mechanism (not shown) below the rolls, a brake 20 is provided to promptly bring the rolls I3 to rest. This brake operates to immediately stop the travel of the threads between the bobbins II and rolls I3 and enables a broken end to be tied in prior to its becoming wrapped around the feed rolls I3 and before it has become twisted with the remaining ends. The knot necessary to tie in this end therefore is extremely small as it is only in the individual end and not in the completed multiple strand twisted thread or yarn.

To eect this braking action upon the` feeding rolls a flexible wire frame 2I is secured xedly to a portion of a fixed supporting member 22, the wire frame having an extended portion directly over the upper feed roll I3. The position shown in full lines in Fig. 1 is the driving or operative posi- J tion for the pair of rolls I3 shown therein. The

vend of the wire frame 2I is directly over rolls I3 and on this end may be mounted the brake in the form of a small block or shoe 20 spaced slightly from the roll I3. When the housing I4 is raised to stop the rotation of the rolls I3, the resilient wire frame 2 I, which does not move upward with housing I4, causes the brake shoe 2li to frictionally engage the peripheral surface of the upper roll I3 and promptly stops further rotation thereof. For convenience in mounting vthe wire frame 2 I, a flange or projection 23 is provide-d on the bearing or supporting member 22 for the driving shaft I8. The brake shoe 20 is immediately disengaged from the feed roll I3 as soon as the rod I1 and housing I4 are lowered when the twisting operation is resumed. The wire frame or support 2l by means of which the' brake shoe 2U is held, is sufficiently resilient to permit rm frictional engagement with the feed roll I3, with sufficient pressure to effect a strong braking action.

To guide the threads from the delivery bobbins I I to the feed rolls I3, a plurality of spaced guiding members are employed. In the form of the invention shown in Figs. 1 and 2 the threads rst pass overa bar or roll25 extending longitudinally of the machine and then pass through individual eyelets 26 in parallelly arranged drop wires 21 adapted upon breaking of a thread to oscillate in the usual manner in the path of a stop motion actuator (not shown).

From Vthe drop wire eyelets 26 the threads preferably travel to an eyelet 28 below the feed rolls I3 and in front thereof. This eyelet 28 is or may be mounted on an extension of the Wire frame 2| supporting the brake shoe 20 and each of the threads being twisted passes through this single eyelet which is of the open type permitting threads to be inserted laterally. From the eyelet 28 on the wire frame 2 I, the threads pass upward and through an eyelet 29 mounted on the end of an arm 30 outstanding from and movable vertically with the vertically movable rod I1. From this latter eyelet 29 through which all of the threads pass in its single opening the threads travel to the feed rolls I3. After passing around these feed rolls `lI3 in the usual manner the threads proceed to the twisting spindle (not shown) first however passing through a wire loop 3| mounted on a bracket 32 on the vertically movable rod I1 directly below the feed rolls I3.

The entire length of travel of the threads from their bobbins II to the eyelet 28 below the rolls I3 as well as from this eyelet 28 to the eyelet 29 above the rolls I3 on thevertically movable rod I1 and from this latter eyelet 29 to the rolls themselves is open to the operator. During this entire length which is prior to their being twisted any individual thread that may break can readily be tied up before the broken end is twisted into the complete multiple strand thread. Also the stop motion aided by the brake 20 pressing directly on the rolls I3 immediately stops travel of the threads upon tilting of a drop wire 21 and the resulting operation of the rod I1 upward to disengage the rolls I3 from their driving gear I9.

Figs. 3 and 4 .show a modified form of the guiding means for the threads between the delivery bobbins II and feed rolls I3 the length of travel being greatly increased over what is shown in Figs. 1 and 2. In the form of guiding means shown in Figs. 3 and 4, the individual threads from the different bobbins I I pass downward and around a small deep grooved pulley 35 centrally below the bobbins II. From this pulley the threads in a common untwisted but closely grouped strand travel to a second pulley 36 also below the bobbins, but on the opposite side of the bobbins from that on which the threads unwind. From this second pulley 36 the threads travel upward to a third pulley 31 adjacent the upper end of the rack III supporting a group of bobbins II. Conveniently this upper pulley 31 may be rotatably mounted on the spindle supporting the upper bobbin II of a group. From this upper pulley 31 the threads may travel downward to eyelets 26 in individual drop wires 21 from which the threads may travel to feed rolls II in the same manner as indicated in Figs. l and 2. The entire length of threads from the bobbins II to the feed rolls I3 between the pulleys 35-36 and 31 is available to the operator for the purpose of tying in ends that may become broken. By means of this greatly increased length the chance of broken ends reaching the nished twisted thread beyond rolls I3 is greatly reduced andknots tied in the nished threads are greatly reduced if not entirely eliminated.

In both embodiments of the invention one of the eyelets, viz 29, above the rolls I3 through which all of the threads pass is mounted on and movable with the vrod I 'l so that when the twisting operation is resumed by moving the rod I1 downward, the eyelet 29 is also moved downward with a consequent slackening of the threads. This releasing of tension upon the threads as the rolls I3 start suddenly when one of the gears I6 engages the driving gear I9 prevents breaking of the threads.

In Figs. 1 and 2 the construction shown materially increasesV the length of threads between the drop wires 26 and the feed rolls I3.- The construction shown in Figs. 3 and 4 increases the length of threads between the bobbins and the drop wires. In both of these forms of the invention the drop wires 26 are below the bank of spools II and adjacent the feed rolls I3. Both forms increase the length of thread available to the operator to tie in individual broken threads.

In the form of the invention shown in Figs. 5 and 6 the objects of the invention are accomplished by guiding the threads in a different manner and also by materially changing the position of the drop wires 26. Referring to Figs. 5 and 6 it will be seen that a longitudinally extending frame member 40 is provided above the rack supporting members I2. To this member 40 is fastened the bracket 4l carrying the drop Wires 26 similar in every way to those shown in Figs. l to 4. In addition a rod or roll 42 may be provided above the drop wires 26 supported from the bracket 4I. From the bobbins II the threads iirst extend upwardly and pass over the rod 42. From the rod 42 the threads extend directly downward and, after passing through the drop wires 26 are guided to the feeding rolls by passing through a suitable comb 44. Individual threads pass through the separated spaces of the comb which may be angularly adjustable and supported on an arm outstanding from rod I1.

By reason of the threads from the bobbins II having to rst pass around rod 42 at which the direction of motion of the threads is substantially reversed the threads are subjected to their greatest strain immediately upon leaving the bobbins. This is the point at which a great many if not most breakages occur. The break, if any occurs, will therefore be relatively close to the bobbin. This leaves all of the distance from the bobbins II to the rolls I3 in which -a broken thread may be tied in prior to the strands becoming twisted after passing the rolls I3.

By means of the adjustable comb 44 located closely adjacent the feed rolls I3 the individual threads are accurately guided upon these rolls without overlapping or twisting. Each thread is .closely adjacent but slightly spaced laterally from the other threads. The threads are therefore engaged by the feed rolls and pass around the rolls in a thin at band equal in thickness to the diameter of the threads.

We claim as our invention:-

1. A twisting machine for textiles comprising in combination, a pair of feed rolls, means to rotate said rolls, racks supporting a plurality of bobbins above said rolls, a plurality of guiding means for said threads disposed between said bobbins and rolls, one of said guiding means being member for said threads above said rolls movable vertically up and down as said rolls are stopped and started.

2. A twisting machine for textiles comprising `fixed in position below said rolls, and a guiding in combination, a pair of feed rolls, delivery bobbins spaced therefrom, guiding means for said threads between said bobbins and rolls, said guiding means causing said threads to travel a greater distance than the distance from said bobbins to said rolls, and a brake exibly mounted on a support for one of said guiding means and adapted to frictionally and resiliently engage one of said rolls upon movement of said rolls to an inoperative position.

3. A twisting machine for textiles comprising in combination, a pair of feed rolls, driving means therefor, delivery bobbins spaced from said rolls, a guide rod over which threads from said bobbins rst pass, trip mechanism adjacent said guide rod to disengage said rolls from said driving means and stop rotation thereof when a thread breaks, said mechanism having thread engaging members positioned closely adjacent said rod, and an angularly adjustable comb adjacent said feed rolls, whereby said threads are retained closely adjacent but spaced apart from each other when rst engaged by said feed rolls.

4. A twisting machine for textiles comprising in combination, a pair of feed rolls, guiding means for said threads before and after said threads pass said feed rolls, driving means to rotate said rolls, means to move said rolls into and out of engagement with said driving means, and a wire frame flexibly supporting one of said guiding means, and a brake shoe on said frame supported in fixed position, whereby said brake shoe may resiliently engage one of said rolls upon movement of said rolls out of engagement from said driving means.

5. A twisting machine for textiles comprising in combination, a housing, a pair of feed rolls therein for the threads being twisted, guiding means for said threads before and after said threads pass said feed rolls, driving means to rotate said rolls, means to move said rolls into and out of engagement with said driving means, one of said guiding means and a brake shoe resiliently supported on said housing adjacent one of said rolls, whereby said shoe will frictionally engage said roll and stop rotation thereof when said rolls are moved to inoperative position.

6. A twisting machine for textilesv comprising in combination, a housing, a pair of feed rolls therein for the threads being twisted, driving means for said rolls, delivery bobbins spaced therefrom, guiding means for said threads between said bobbins and rolls, trip-ginechanism to disengage said rolls from said drivingmeans and stop rotation thereof when a thread breaks, said mechanism having thread engaging members positioned thereon adjacent said bobbins, and

guiding means for said threads closely adjacent and movable with said feed rolls for retaining said threads in closely spaced but separated relation.

IRVING R. ROWE. EDWARD E. BRADLEY.

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