US2006055A - Lap arrester for winding machines - Google Patents

Description

June 25, 1935. o, McKEAN LAP ARRESTER FOR WINDING MACHINES Filed June 20, 1933 2 Sheets-Sheet l INVENTOR ATTORNEYS June 25,-.1935. J. 0. McKEAN LVAP ARRESTER FOR WINDING MACHINES Filed June 20, 1953 2 sheets sheet 2 INVENTOR ATTORNEYS- Patented June 25, 1935 LAP ARRESTER FOR. WINDING MACHINES John 0. McKean, Westfield, Mass, assignor to Foster Machine Company, Westfield, corporation of Massachusetts Mass, at

Application June 20, 1933, Serial No: 676,621

7 4 Claims. (Cl. 242-19 In winding thread upon a package by means of a rotary friction actuating mechanism, it sometimes happens that the thread breaks near the package and is caught and wound up by the rotary actuating member. Under certain other conditions the same resultis obtained. In view of the high speed at which the actuating member rotates, the thread very quickly wound up into what is termed a lap, which necessitates stopping the machine in order to remove it.

One object of my invention is to provide a means of quickly and automatically severing the thread and thereby stopping the winding of the thread on the actuating member when such a lap has been begun.

Another object of my invention is to automatically detect the building up of such a lap in its early stages, and subsequently to scverthe thread and thereby stop the further building up of the said lap.

A third object of my invention is to provide such a device as is indicated in the above objects which will be of extremely simple construction and which may readily be assembled and disassembled.

Other objects and advantages will be apparent as my invention is further described.

A practical embodiment of my invention is represented in the accompanying drawings, in which Fig. 1 represents a vertical transverse section through so much of a winding machine as will give a clear understanding of the construction and operation of my lap arrester, the parts being in the positions they assume as the thread is being wound onto the package, and when no lap being formed;

Fig. 2 represents an enlarged vertical transverse section thmugh that portion of the winding machine shown in Fig. 1 which includes my lap arrester, the parts being in the positions they assume when the. thread has become so engaged with the rotary actuating member as to be wound thereupon, forming a lap of suficient size to actuate my lap arrester and thereby cut the thread;

Fig. 3 represents a cross section of the structure shown in Fig. 2, taken along the line III- III of Fi 2;

Fig. t represents a plan. view of the same; and

Fig. 5 represents a perspective View of the cutting element shown in the other figures.

It should be understood that by the term thread as used in this application, I mean to include yarn, cord or other media which can be successfully handled by a winding machine.

It should also be noted that although I have here represented my lap arrester in connection with a rotary traverse winding machine, it is readily adaptable to' any machine wherein the package is actuated frictionally'by meansof a. winding roll since the increase in diameter of any such drum due to the formation of a lap may be used similarly to actuate the thread-severing means.

It may here be pointed out that given a certain type of machine it is generally possible to'predict with some degree of accuracythat portion of a, roll which will be liable tolap building, since if the lap results from a failure of the traversing means, the thread will have a tendency to wind down on a roll until it reaches a. point where the thread makes a right angle to the line of tangency of the surface of the roll to the plane in which the thread is ordinarily traversed. This is another-way of saying that the thread will so move on the roll that it is the shortest distance away from the guiding point. If one considers the lap which might be built up upon'a cylindrical roll such as is'shown in thlsapplicetion, where the thread is guided from a. point equidistant the ends of the roll, the area where the lap will be built upwill necessarily be at the middle of the roll. For this'reason it is not necessary for the contacting member, later described, to be the full width of the roll.

5 PATENT OFFICE The winding machine construction shown in Fig. 1, aside from the novel features to be described below, are of a nature well understood in the art, and will, therefore, not be described in detail other than to say that conical package I is carried by forwardly projecting arm 2 and in the position shown in Fig. 1 lies in contact with and is actuated by traverse roll 3, which revolves in the direction of the arrow, as indicated in Figs. 1 and 2. The thread as it unwinds from bobbin 4 passes through tension device 5, through detector wire 6, over stop motion cover I, over traverse roll 3 and onto package I. Stop motion cover I is mounted on the stop motion mechanism in a well known manner by means of a screw 8. Attached to the under side of stop motion cover 1 is bracket 9 having depending ears l0, I9, which ears ID are provided with holes II, I I through which are pivoted the ends of spring wire l2, which is snapped through holes ll, pivoting in position lap arrester 13, such lap arrester being shaped as shown in the drawings, having a stop portion I I which normally rests against stop motion cover I, as shown in Fig. 1, two split and deformed portions l5, 15 serving to provide the means of engagement between spring wire i2 and lap arrester l3, arcuate roughened portion l6 serving as a means of contact between said lap arrester and lap l1, and a knife supporting portion l8 onto which knife portion I9 is soldered. The central portion of the lap arrester is cut away at and near its axis on spring wire I2 so as to provide space for the free play of spring 20 attached at one end through a lug 2| on the under portion of stop motion cover I, and at its other end to the lap arrester [3 at the end of the cut away portion nearest its stop portion 14. It will be seen that the spring serves to throw the lap arrester from an intermediate position either way to its entirely retracted position as shown in Fig. 1 or to its thread-severing position as shown in Figs. 2, 3 and 4.

Stop motion cover I is cut away at and near the central portion of the edge nearest to the traverse roll 3 so as to provide a space through whichthe lap arrester may swing in order to contact with the thread. The horizontal edge of this cut away portion 22 serves as a stop to limit the upward movement of the lap arrester as it swings into operating position.

In operation, when for any reason the thread begins to. wind upon the traverse roll, the lap is formed with great rapidity. This lap occurs at or near a single portion of the traverse roll in the form of winding machine here described, due to the fact that upon its formation the traversing means is rendered inoperative. Roughened por tion of the lap arrester is adjusted in close proximity to the traverse roll, and as the lap reaches such a size as to enable it to contact with this roughened portion, it engages such portion and swings it immediately into the position shown in Figs. 2, 3 and 4, whereupon knife-holding end i8 of the lap arrester operates, if necessary, to guide the thread into knife I9, which immediately cuts the thread, arresting the building up of the lap, and also enables detector wire 6 to drop, serving, through the stop motion mechanism, to lift the package away from the traverse roll. By this same motion roughened portion It is swung away from the lap I! so as to avoid damage to the lap arrester from the fastrotating lap, and the spring 20 serves to make certain that the knife is carried to its uppermost position, and retains it in such position until it is manually depressed. The machine is then stopped, at the convenience of the operator, the lap is removed, the lap arrester is snapped down to its inoperative position, and the machine is threaded and started in the usual manner.

It will thus be seen that I have devised a lap arrester for use in winding machines which is automatic in operation, and which may detect a lap immediately upon its being formed, and will out the thread, thereby preventing the waste of additional thread. This lap arrester furthermore prevents the lap from growing, as it might were it neglected, to such proportions as to interfere with or possibly injure other portions of the winding machine and does this with a uniform certainty and promptitude which cannot be achieved by the old methods wherein it was necessary for the human element to play a large part. a

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein shown and described, but

What I claim is:

1. In a winding machine, a stop motion cover, means pivoted to the under side of the stop motion cover, said means having a roughened portion adapted for contact with a lap, and a thread-severing means carried by said means.

2. In a winding machine, a winding roll, and a swinging lap arrester having: means limiting the amplitude of its swing, a portion proximate to but out of contact with said winding roll, and a thread-severing portion.

3. In a winding machine, a winding roll, a swinging lap arrester having: means limiting the amplitude of its swing, an arcuate roughened portion proximate to but out of contact with said winding roll, and a thread-severing portion adapted to sever the thread.

4. In a winding machine, a swinging pivoted element adapted for contact with a lap. a threadsevering means carried by said element, and means for urging said element away from a position intermediate the ends of its swing.

JOHN O. MCKEAN.

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