US1881598A - Yarn guide for upstroke twisters - Google Patents

Description

oct. 11, 1932'. B, D, HUBBARD 1,881,598

YARN GUIDE FOR UPSTROKE TWISTERS Filed oct. 7. 1930 Patented Oct. 1l, 1932 UNlgrED STATE-s PATENT OFFICE BARTON-D. AHUIBIBABD, F PORTLAND, MAINE, ASSIGNOR TO BROWN COMPANY, 'OF

BERLIN, NEW HAMPSHIRE, A COBPQBATION OF MAINE YARN GUIDE FQR UPSTROKE TWISTEBS Application med October 7, 1930. Serial No. 486,982.

'.lhis invention relates to upstroke twisting mechanism by which a cheese or cake of arn is rapidly rotated while the yarn is fed rom the interior of the cheese. vThe rotation of the cheese imparts a twist.to the yarn, the

amount of twist depending upon the relation between the rate of rotation and the rate of feed. Heretofore it has been custernary to place the cheese of yarn in a ic rotata 1y Vinounted plot having a central l spindle, the end of t e yarn being led upwardly to a point above the s indle where it is enga ed by feed rolls. wing to the liabilit o the yarn tobecome twisted around i5 the spindle and thus to cause the yarn to break, various devices have been made to overcome this tendency. According to the present invention the spindle-is omitted entirely 'and astationary guide is provided inao stead to lead the twisted strand from the pot and to prevent ballooning of the strand. To this end the tube may be advantageously supported with at least its lower end substantially in the axis of rotation of the pot.

25 The tube is preferably adjustable vertically so that it can be correctlypositioned relatively to the potfor satisfactory operationy according to the speed of rotation of the pot, the size of the yarn, etc.

For a more complete understanding of the invention, reference may be had tothe description thereof which follows and to the drawing in which,-

Figure 1 is a perspective view of an em- 35 bodiment of the invention, other associated mechanisms being shown in elevation and section. Y V

^Figure 2 is a section on'the line 2,-2 of Fi ure 1.

may include a ot rotatably mounted on a spindle 11 whlch is provided *with a pulley 12 to receive a driving belt in a manner well known in the art. The rotatable spindle 11 45 projects downwardly through a portion of a illustrated in Figure 1, the invention fixed frame 13 in a manner well known in the art, a brake 14 being provided to stop the rotation of the spindle and pot quickly when desired. As shown, the pot is not provided with a central spindle rising from the bottom thereof. instead, a suitable tube may be supported above the pot as by a bracket 21 mounted on the frame 13. rI he tube 20 may be alined with the axis of rotation `of the pot 10, the lower end 22 of the tube bein adjusted at any desired height above the ottom of the pot 10. A. set-screw 23 ma be provided in the head of the bracket 21 to old the tube 20 in adjusted position.

in order to facilitate the threading of the tubular guide 20, it may be provided with a lateral slot 25 extending from one end to the other thereof, this slot being 'cut through the wall of the tube, as shown in Figure 2, in a direction at an angle to the radius of the @5 tube. As shown, the direction of the slot is nearly tangent to the inner surface of the tube. rIhe lower end 22 of the tube is rounded so as to prevent the catching or chang of yarn thereon. The non-radial direction of 79 the slot 25 prevents the yarn' from catching at the lower end of the slot. The head of the bracket 21 may also be provided with a slot 26 with which the slot 25 is made to register so that the yarn can be quickly threaded through the tube 20. The lower end 22 of the tube serves as a circular guide to lead the twisted yarn from the interior of the pot. The walls of the tube above the lower end act to prevent ballooning of the twisted yarn above the mouth of the pot.

The yarn, after leaving the tube 20, may be led through a suitable upper guide 30 and thence to a pair of feed rolls 31, 32,

one of which is driven'in the usual manner, g5'

and thence through a traversin guide 83 to a bobbin or spool 34 on which 1t is wound into a thread body by a suitably driven roll 35 on which the spool 34 rests.

It is obvious that various changes and A2 v Y Y 1,3812598 modifications ma be made in the structure shown and descri d without departing from the spirit and scope of the invention.

I claim: Y 5 In an upstroke twister, a rotatable pot,

and a tubular yarn guide having its lowerv Y end in the axis of rotation of said pot, said tubular guide having a. lateral` slot throul its wall at an angle to the radius of the tu' 10 and extending from one end of the tube to' the other. I In testimony whereof I have aixed my signature.

' BARTGN D. HUBBARD.

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