US1256030A - Tension device for winding-machines. - Google Patents

Description

J 0. McKEAN.

TENSION DEViCE FOR WINDING MACHlNES.

APPLICATION FILED MAY 26, 1917.

Patented Feb. 12, 1918.

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APPLICATION FILED MAY 26. 1917- Patented Feb. 12, 1918.

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ASSIGNOR T0 FOSTER MACHINE p COMPANY, OF WESTFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

TENSION DEVICE FOR WINDING-MACHINES.

1,256,03Q. Original application filed February 2,

To all whom it may concern:

Be it known that I, JOHN O. MGKEAN, a citizen of the United States, residing at Westfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Tension Devices for Winding-Machines, of which the following is a specification.

My invention is an improvement in tension devices forwinding, the object being to provide an adjustable, varying tension mechanism, which can be members, as desired, while the winding progresses, to keep the draft on the thread uniform during the winding operation, or to cause the draft on the thread to increase or decrease as the winding progresses.

In the drawings I have shown my tension device applied to a winding machine such as is 'shownin my pending application, Serial No. 75,802, of which this application is a division. c

Figure 1 is a front view in elevation;

Fig. 2 is an end view in elevation showing the end of the machine to the loft in Fig. 1;

Fig. 3' is a detail, in plan, of a portion of the tension mechanism, taken on line 33 of Fig. 2,-looking in the direction of the arrows.

Fig. 4 is a detail, in sectional elevation and enlarged scale of the tension disks and associated parts.

My improved tension mechanism as herein shown and described, is applied to a winding machine designed to produce a cop of the well known open wind, self-binding type. The thread is to be wound upon a quill of card-board or the like; this quill is slipped endwise onto a spindle l and the leading end of the'thread m is fastened thereto. When the machine is started the spindle and quill rotate together and the thread as, directed by th reciprocating thread guide 2, is wound onto the quill in long, open spirals, the spirals laid by the reciprocation of the thread guide in one direction being crossed and bound down by the succeeding spirals laid by the reciprocation in the opposite direction. The spindle l is mounted in a suitable bearing, for rotation, and the thread guide is engaged by a rotating cam 16, and reciprocated back and forth upon a suitable guide rail 9, which guide rail is carried at itsends by arms 10 iorg part at a hous- Specification of Letters Patent.

set to release the tension Patented Feb. 12, 191%.

1916, Serial No. 75,802. Divided and this application filed May 26,

1917. Serial No. 171,219.

ing 11, rotatably supported upon an arbor 14. Within the housing 11 the arbor 14 has mounted thereon the cam 16, which engages the tang 2l of the thread guide 2. All the above mentioned parts and others not necessary to be described in this application are shown in my application, Serial No. 75,802. On the side of the housing 11 opp0- site to that upon which the thread guide rail 9 is mounted is secured a weight45, which tends to throw the thread guide constantly in the direction of the cop and to cause it to travel close to or in contact with the cop. The cam 16 rapidly reciprocates the thread guide 2 lengthwise of the spindle 1 layin successive layers of thread upon the quiil and as the cop grows the thread guide is forced away from the spindle and swings the housing 11, which carries the thread guide rail 9, upon the arbor 14.

I have provided an automatic tension control in which the thread or yarn from which the cops are built is led from the supply around a rotatable spindle a mounted in the end of fixed spindle b, the thread or yarn passing between two disks 0 and d (see Figs. 1 and 4), the former fast against movement on spindle a, and the latter, by a pin and slot connection, capable of endwise movement. From the disks, the thread passes under a drop wire, 6, and upwardly over guard f to the thread guide eye and cop. Slidably mounted upon the spindle b is a sleeve {1 which is exteriorly threaded to receive upon it an adjustable nut it between which and disk d is arranged a spiral spring 71 which yieldingly presses against a loose sleeve j which in turn abuts upon the disk d and presses it against the thread or yarn as it passes between the disks 0 and (Z, the initial pressure of the spring 2' against disk (Z, and therefore the initial tension on the yarn or thread being determined by the adjusted position of the nut h on sleeve 9 and the consequent spring pressure. During the operation of building a cop, the cop, of course, grows in diameter, with the result that the yarn or thread is drawn from the supply at a continually increasing rate of speed which thread or yarn in exact proportion to the increase in speed and in order to counteract this and maintain the proper tension,

have herein provided for automatieatly increases the tension on the.

relaxing the tension producing device or devices as the speed of movement of the thread or yarn increases during the growth of the cop. To accomplish this the sleeve 9 is made at one end with an arm g pivotally connected with a small sleeve is slidably mounted upon a cam bar Z. This cam bar 1 is pivoted at m to a slide and its opposite end extends loosely through a square sleeve 0 resting upon the top of slide n. Sleeve, 0, is pivotally connected to asquare nut p mounted upon a screw g rotatably supported at its ends by slide 12 and held against endwise movement thereon by a collar 1' and thumb piece .9. At its forward end the slide n rests upon an arm t forming part of 'the frame of the machine while the rear end of said slide is supported by the lug u to shifted bodily on arm t direction of this sliding movement of said which it is pivotally connected by a screw '0. Thus it will be clear that the slide a is whenever the housing 11 is swung on arbor 14 and that the slide is crosswise of the axis of spindle b. By means of the screw 9 the cam bar Z is set in a diagonal position relatively to the spindle b so that it will also be clear that the bodily movement imparted to the slide 11, during the growth of a cop is imparted to the cam bar and the latter, acting through the sleeve k, arm g, sleeve 9 and nut h, will automatically relax the pressure of the spring 73 on disk 01 thus decreasing the tension ef fect of the two disks 0 and d as the winding progresses. v

As is well known it is a property of a spiral spring that it increases or decreases its resistance in exact accord with the amount which it is distorted from its normal spiral. This property is taken advantage of in. the ordinary spring balance scales, in which the graduated plate indi: cating the weight is equally spaced and the spring correspondingly distorted by the weight. I take advantage of this by employing a straight cam bar which, when set at the proper angle, for every inch of radial growth of a cop and consequent increased speed of the thread, will exactly compensate by permitting the spring to correspondingly expand and thus decrease the tensional drag on the thread in exact proportion to the increase caused by the increase in speed. have shown adjusting means to vary the angle of the straight cam bar, since it is not always desired to keep the tension uniform, but itmay be desired to gradually increase or decrease the tension as the cop builds.

I claim In a wlnding machine, an automatic tension device made up of two presser members; a spiral spring adjusted to press one I member toward the other; an adjustable abutment to adjust the tension of the spring; a straight cam bar set at a desired angle to the axis of the spring; a slide upon the cam bar; a link between the slide andthe spring abutment; a carriage carrying the cam bar and connected to the thread guide so that the movement of the thread guide due to growth of the cop will move the cam carriage and regularly and progressively relieve the tension of the spring and pressure on the presser members.

Signed by me at Westfield, Massachusetts, this twenty-third day of May, 1917.

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