US2134017A - Exhaust detector for stop motion mechanism in winding machines - Google Patents

Description

Oct. 25, 1938.

E. R. ALDERMAN EXHAUST DETECTOR FOR STOP MOTION MECHANISM IN WINDING MACHINES File d March 19, 1957 s Sheets-Sheet 1 INVENTOR Bl/GEA/E PALZJERMAA/ ATTORNEYS Oct. 25, 1938. R E A 2,134,017

EXHAUST DETECTOR FOR STOP MOTION MECHANISM IN WINDING MACHINES Filed March 19, 1937 3 Sheets-Sheet 2 INVENTOR EUGENE A. AwHMM/v ATTORNEYS Oct. 25, 1938. R, AN 2,134,017

EXHAUST DETECTOR FOR STOP MOTION MECHANISM IN WINDING MACHINES Filed March 19, 1957 3 Sheets-Sheet 3 INVENTOR [A says 1? 1441259444 ATTORNEYS Patented Oct. 25, 1938 UNITED STATES EXHAUST DETECTOR FOR stroP Mo'rIoN" MECHANISM IN WINDING MACH ES Eugene R. Alderman, SouthHadley, Mass, as-

Signor to Foster Machine Company, Westfield,. Mass, a corporation of Massachusetts Application March 19,

5 Claims.

My present invention relates to winding machines and has particular reference. to an automatic stop motion designed to stop the winding spindle of the machine upon the exhaust or near exhaust of the yarn of the supply bobbin for easy replenishment of the same.

Heretofore in machines of this character the usual drop wire detector for yarn breakage has been relied upon for stopping the winding spindle when the supply bobbin is exhausted, but in such an arrangement the stopping does not occur until the free end of the exhausted. yarn has run through the several guide devices and has been wound on the package. Under such circumstances the operator has to spend considerable time and labor in hunting for the exhaust yarn end on the wound package and in manually threading a new yarn end .through the guiding devices for being tied to the exhaust end.

One of the principal objects of the present invention is to provide means for stopping the winding spindle when the yarn on .the supply bobbin yarn that usually occurs. with the stoppingdevices heretofore used. A

' The term bobbin will be referred to herein as meaning any form of supply such as bobbins, cops, quills, etc., and the term yarn will be referred to as meaning any fiber used in textiles, such as wool, cotton, silk, etc., or any material being wound, such as wire, paper, glass, etc.

Referring to the drawings which show appreferred embodiment of my invention:.

Fig. 1 is a side elevation of the stop motion for ,one of the winding units of awinding machine, it being understood that such winding machines usually comprise a large number of said units in line, each one independently operated;

- Fig. 2 is a detail view of the tripping mechanism of the stop motion in its position after being tripped by the near exhaust of the yarn supply;

Fig. 3 is a detail plan, somewhat enlarged, of the detector and associated parts of the tripping mechanism;

Fig. 4 is a fragmentary detail of the bobbin and ieeler end of the detector looking in the direction of the arrow a in Fig. 2;

Fig.5 is a fragmentary detail in front elevation of the tripping latch and associated parts;

1937, Serial No. 131,804

Fig. 6 is a detail side elevation of said tripping latch and its support;

Fig. '7 isa detail side elevation'of a modification, via, the tripping latch arranged for operation electrically; and I V Fig. 8 is a detailview of the supply bobbin pin showing the spring retainer for holding the bobbin thereon; I

Referring more particularly to the'drawings, the main name of the winding machine is indicated at l and since theLwinding machine is of usual character it need not be further described. Extending upwardly from said frame is a supporting bracket 2- which carries a supporting, rod 3 running lengthwise of the winding machine for supporting parts of separate stop motion mechanisms of the several winding units.

Extending irom the rod 3 is the bobbin holder 5 havingadjustably mounted therein bobbin pin 4 upon which is fixed the bobbin supporting base 5. The bobbin 5 rests on the base 6 and the latter is adjustable vertically on bobbin pin. 4 so as to locate the supply bobbin 7 inthe desired operating position to bring the last remainingportion of yarn onthe supply bobbin into contact with the feeler-end E5 of the detector 8. Embracing the bobbin pin 4 is a spring retainer 9 formed preferably of tubular spring. steel having spaced bulbous portions it out by slits l I so, as to compressibly fit within the bore of the bobbin]. This reits support and by adaption to bores of varying size keeps such bobbins properly centered with respect to pin A, (see Fig. 8).

V In the operation cfthe winding machine the yarn y is drawn, oi'f from the supply on the bobbin 1 over the upper end thereof and upwardly over an initial guiding device 33 comprising a tension roller and its wire guide, thence downwardly, under and over suitable friction guides 34, through the eye of a usual drop wire detector .35, and finally through the traversing guide 36 to the winding package E6! on the winding spindle l9. The winding spindle i9 and package of yarn thereon is driven irictionally by a revolving driving roll 15 of the winding machinein. the usual manner.

It will be noted in Fig. 1 that the yarn guide device 33, which first receives the yarn from the bobbin '3 is located vertically above said bobbin. The distance of said yarn guide 33 above the bobbin 1 is intended tobe represented in Fig. 1 as being sufficient to allow the stopping of the yarn y within said distance. The yarn guide 33 will be approximately at the level of the average tainer 9 yieldingly but firmly holds the bobbin on I exhaust point of yarn on the supply bobbin, the

winding machine will be stoppedbefore the exhaust end of yarn passes over the first guiding or tension device 33. This exhaust end will either be in one or two remaining coils around the empty bobbin or at least will be hanging in the space between the upper end of bobbin I and the tension .device 33 when the winding machine stops, thereby allowing the operator to quickly replace the empty bobbin with'a full bobbin, and to tie in the new end while standing in an upright position and without the trouble of manually rethreading the new yarn end.

The stop motion and its tripping mechanism 4 for accomplishing the aforesaid result will now be described. Referring to Fig. 1, a brake and throw 011 bar 69 extends beneath the winding spindle I9 and when tilted upwardly lifts the winding spindle and its package off the driving roll and at the same time applies a braking action thereto. The brake bar 69 is adjustably fastened to a tiltable angle member II pivoted at F6 on the main frame and a spring I8 normallytends to rock said angle member II in a counterclockwise direction to throw the brake bar 69 upwardly. During the running of the winding machine, aforward nose portion 11 of the angle member II rests against a blocking cam' I9 and the angle member 'II is held inactive thereby, but is subject to the stress of its spring I8. The cam block'l9 forms an integral part of a knock off plate 80 which is pivoted at 8| on the main frame. The knock off plate 88 carries on its underside a bell crank shaped pawl 82 or tripping member pivoted at 83 on said knock off plate and one arm of said pawl 82 carries the trip arm 29. The other armof said pawl 82 is adapted when the trip arm is released as hereinafter described, to fall into position as shown in dotted lines in Fig. l, for being engaged by a tooth of the constantly rotating kicker shaft I2 of the machine. When the pawl 82 is thus engaged by the kicker shaft it is thrown upwardly to the position shown in Fig. 2, carrying the knock ofi plate 80 also upwardly so as to disengage cam block 19 from beneath nose 11 of the angle member II. This action permits tilting of the latter under force of its spring 18, and the winding spindle is stopped, as described. The positions of said parts when the machine is stopped are shown in Fig. 2.

The tripping mechanism for holding and releasingtrip arm 29 and its pawl 82 comprises the forward side of the trip arm 29 for holding and releasing the same. The other arm 28 of the iatch,member I8 carries at its upper end an adjustable stud fixed in position by lock nut 3I and is adapted to be engaged by a curved tail portion I6 of the detector 8. The rocking move ment of the latch member I8 on its rod 28 is limited by a stop piece 22 (see Figs. 5 and 6) which isa-djustably fixed on the rod 29 by stud screw 23 and which has two spaced lugs 24 and 25, one at each side of said latch member I8 to limit the movement thereof. A helical torsion spring 26 is located between one side of the stationary stop piece 22 and the inner side of one bearing of latch member I8, and is so fastened as to give a rotary tendency to said latch member I8 to insure the proper latching of the blade 21 under the trip arm 29. The spring 26 also steadies and tends to prevent inaccurate disengagement of said latch 21 which might occur from the vibration or chattering of the winding machine when running.

The detector 8, as shown in Fig. 3, it is the form of adouble armed lever pivotally mounted by, bearings I4 upon a stud I3 carried on an upward extension of the bracket I2 of the main frame The rear arm or tail portion I6 of detector 8 is curved as shown so as to bear against the stud 30 of the latch member I8. The for- Ward arm of the detector 8 is in the form of a continuous length of. wire extending straight toward the bobbin at right angles to the axis thereof and adjacent said bobbin, being bent into a V,-s haped portion in the same plane as the axis of said bobbin with the apex I5 of said V in position to bear against the yarn on said bobbin,

7 and then extending beyond said bobbin with a finally'bent terminating portion. The feeler-end of the detector is at the apex I5, and the purpose of providing the V-shaped portion as shown 1 is to shape the detector so as to facilitate the is mounted on the pivot stud I3 and is so ar-.

ranged as to act on the detector 8 and keep its feeler-end I5 constantly pressing against the yarn on the bobbin.

The operation of the tripping mechanism is as follows: Assuming that a. full bobbin is on its support as in Fig. 1, the detector 8 bears with its feeler-end I5 against the yarn on the bobbin with constant though light pressure. The latch blade 2Iis located under the trip arm 29 and holds the 'knock off mechanism from being operated by the constantly rotating kicker shaft I2. When the yarn on the supply bobbin 1 is nearly exhausted as shown in Fig. 2, the detector 8 will have swung far-enough so that its tail portion I8 'pressing against stud 38 of the latch member I8 will rockthe latter and remove the latch 21 from beneath the trip arm 29. This allows the latter to fall and permits the knock off action to occur through the kicker shaft I2 as previously described, and stops the winding spindle. The empty bobbin may then be removed and replaced by the full bobbin while the remnant portion of yarn on the empty bobbin is in convenient position for the operator to tie in the yarn of the new bobbin without any manual rethreading operation. 7

It is sometimes desirable to operate the tripping mechanism electrically, and for this purpose the modification shown in Fig. 7 is provided. The detector 8, trip arm 29 and latch member I8 are all as before described. Mounted in fixed position on the upward extension of bracket I2 is an electromagnet E having its pole pieces 88 adjacent to an armature 8I fastened to the latch member 2'I. The energizing circuit of the magnet E is indicated by conducting wires 82, 83 and 84, which circuit comes from an electrical source of supply not shown, and is normally interrupted between the contact 38 of the trip 21 and the tail portion l6 of the detector 8. When the feelerend l5 of the detector as previously described is allowed to move inwardly far enough due to exhaustion or near exhaustion of yarn on the bobbin to bring IS in contact with 3| the circuit is completed, the magnet E energized, and the armature 8| attracted to the pole pieces 8E! for withdrawing the latch 21 from beneath trip arm 28, thereby actuating the knock off in the manner previously described. In the use of such an electric arrangement for the latch 21, it is possible to have the upper end of said latch normally located a sufficient distance beneath the end of trip arm 29 to prevent its being accidentally removed therefrom by the shaking or vibration of the machine. In the mechanical operation of these parts previously described, the tail portion I6 of the detector is constantly bearing and gradually moving the latch 21 from beneath the trip arm 29 and the last portion of this movement, just prior to release of latch 27 may sometimes be disturbed in its accuracy of timing the release if the vibration is too severe. Consequently the electrical method of operating these parts provides for a greater degree of accuracy under abnormal conditions of machine vibration, in predetermining the releasing point of the latch 21 since said latch is not moved at all during the gradual exhausting of the yarn and is only moved at the conclusion of said exhaust when contact is made between tail piece l6 and the stud 30.

I claim:

1. In a winding machine in combination, a winding spindle, a supply bobbin and a support therefor, an initial guide device for yarn located vertically at a suflicient distance above said supply bobbin to permit the yarn running oif said supply bobbin being stopped Within said distance, whereby the end of a new bobbin supply may be tied to the end of the exhausted bobbin supply in the space between said bobbin support and said initial guide device, a stop motion mechanism comprising means to stop said winding spindle,- a feeler constantly pressing against the diminishing body of yarn on said bobbin, means operated by said feeler to actuate said stop motion mechanism when the yarn on said bobbin is at or near the point of exhaustion.

2. In a winding machine in combination, a winding spindle, a supply bobbin and a support therefor, an initial guide device for yarn located vertically ata suflicient distance above said supply bobbin to permit the yarn running off said supply bobbin being stopped within said distance, whereby the end of a new bobbin supply may be tied to the end of the exhausted bobbin supply in the space between said bobbin support and said initial guide device, a stop motion mechanism comprising means to stop said winding spindle vertically at a sufiicient distance above said supply bobbin to permit the yarn running off said supply bobbin being stopped within said distance, whereby the end of a new bobbin supply may be tied to the end of the exhausted bobbin supply in the space between said bobbin support and said initial guide device, a stop motion mechanism comprising means to stop said winding spindle including a constantly rotating kicker, a tripping member which upon being released is actuated by said kicker, and a latch to hold said tripping member against release, a feeler constantly pressing against the diminishing body of yarn on said bobbin, and means operated by said feeler to move said latch in release of said tripping member when the yarn on said bobbin is at or near the point of exhaustion.

4. In a winding machine having a winding spindle, a supply bobbin and support therefor, the combination with a stop'motion mechanism for said winding spindle, of detecting mechanism for causing the actuation of said stop motion mechanism when the yarn on said bobbin is at or near the point of exhaustion, said detecting mechanism comprising a feeler finger formed of a continuous length of wire extending at right angles to the axis of said bobbin and bent into a V-shaped portion in the same plane as said axiswith the apex of said V-shaped portion resiliently pressing against the diminishing body of yarn on said bobbin.

5. In a winding machine in combination, a winding spindle, a supply bobbin and a support therefor, an initial guide-device for yarn located vertically at a sufficient distance above said supply bobbin to permit the yarn running ofl said supply bobbin being stopped within said distance, whereby the end of a new bobbin supply may be tied to the end of the exhausted bobbin supply in the space between said bobbin support and said initial guide device, a stop motion mechanism comprising means to stop said winding spindle including a tripping member and a latch for holding said tripping member against release, a feeler constantly pressing against the diminishing body of yarn on said bobbin, an electromagnetic device for moving said latch in release of said tripping member, an electric circuit and switch for said electromagnetic device, and

means operated by said feeler for actuating said switch when the yarn on said bobbin is at or near the point of exhaustion.

EUGENE R. ALDERMAN.

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