US2480936A

US2480936A - Slub yarn apparatus drive

Info

Publication number: US2480936A
Application number: US791142A
Authority: US
Inventors: Kershaw John Green
Original assignee: Dominion Textile Inc
Current assignee: Dominion Textile Inc
Priority date: 1947-06-10
Filing date: 1947-12-11
Publication date: 1949-09-06
Anticipated expiration: 1966-09-06

Description

J. Gv KERSHAW SLUB YARN APPARATUS DRIVE 2 Sheets-Sheet 1 Filed D80. ll, 194;

- INVENTOR. Joy/v GREEN #5 9744 w Sept 6, 14@. J. G. KERSHAW SLUB YARN APPARATUS DRIVE 2 Sheets$l1eet 2 Filed Dec. 11, 1947 INVENTOR. JOHN G/mm fires/MW Patented Sept. 6, 1949 SLUB YARN APPARATUS DRIVE John Green Kershaw, Westmount, Quebec, Canada, assignor to Dominion Textile Company Limited, Montreal, Quebec, Canada, a corporation of Canada Application December 11, 1947, Serial No. 191,142 In Great Britain June 10, 1947 4 Claims.

Introduction This invention relates to apparatus for producing slub yarn and more particularly to improvements in slub motions.

Slub motions are usually applied to spinning frames in order to provide periodical acceleration or deceleration of the rolls in order to cause slubs in the yarn. A spinning fram is usually made up of two companion sides, each side identical and driven from a common source of power. The prior art has made use of many complicated systems for producing slub on yarns, and various attempts have been made to produce identical patterns of slub on both sides of the spinning frame, but so far the apparatus has been intricate and clumsy, including generally the use of a complete slub motion apparatus on each side of the spinning frame, and moreover has required considerable alteration to the standard machine for installation.

The present invention deals fundamentally with these conditions, and it aims to devise a thoroughly practical solution for them by providing a simple apparatus for operating slub motion clutches on each side of the machine simultaneously in order to provide identical patterns of slubs on each side of a spinning frame, and which can be afiixed to existing spinning frames with the minimum of change.

Statement 0 f invention The invention is embodied in apparatus employed in conjunction with a spinning frame to increase the speed of the back rolls on both sides of the frame simultaneously and at intervals predetermined to produce the desired slub pattern.

The invention is a slub motion apparatus adapted for use on a spinning frame and includes a rotatably mounted cam, means to rotate the cam, a pivotally mounted pawl lever having a lever arm which is adapted to engage the cam, a yoke adapted to engage a first clutch on one side of the spinning frame, and a further extension which is adapted to engage an elongated connecting rod. The elongated connecting rod is rotatably mounted and extends across the spinning frame with one end of the rod formed upwards at an angle to its horizontal axis. The formed end of the rod has a bifurcate shape and is adapted to be engaged by the extension of the pawl lever. The other end of the connecting rod is provided with a yoke which is adapted to engage a second clutch at the other side of the spinning frame.

A principal phase of the invention is the construction of the elongated connecting rod, which is formed and mounted so that its motion upon being actuated urges the second clutch into engagement simultaneously and in the same direction as the first clutch, thus enabling the clutch mechanism of both sides of the frame to be identical and one slub motion apparatus to operate both sides of the spinning frame.

A further phase of the invention is in the use of clutches in which the perpendicular faces of the engaging teeth are backed off or angled from the perpendicular or angle preferably from about 12 to 14, this backing 01f being found by the applicant to allow for easy instant disengagement upon the clutches being released by the enaging means.

A resilient means acting independently of the cam is adapted to urge the first and second clutches out of engagement whenreleased by the actuator means, and the rotatabl mounted cam is adapted to release and engage the actuator means at selected intervals to cause engagement and disengagement of the first and second clutches.

Detailed description Having thus generally described the nature of the invention particular reference will be made to the accompanying drawings illustrating a preferred mechanical embodiment thereof, and in which- Figure 1 is a fragmentary plan view of the end of a spinning frame embodying a slub motion according to the present invention.

Figure 2 is a fragmentary side elevation partially in section, of the slub motion as shown in Fi ure 1.

Figure 3 is a fragmentary detail of the teeth on the clutch faces showing the angles thereof.

With particular reference to the drawings. a preferred embodiment of the invention is shown. in combination with a spinning frame having a pair of driven front rolls U3 H! which mounted for rotation on drive shafts l4 and !6. said rolls being substantially parallel with dri en back rolls l8 and 2!) which are mounted for rotation on

drive shafts

22 and 24,

A gear train comprising a gear 26 fixedly attached to the front roll drive shaft M is adapted to drive a gear 28, and. a gear 30 fixedly attached to said gear 28 is adapted to drive a gear 32. said gear 32 being fixedly attached to a rotatably mounted cam 34.

The rotatable cam 34 having a plurality of openings in its outer face is adapted to mount a plurality of raised studs or bosses 36. A p lever 38 is pivotally mounted to the frame 59 of the spinning frame by a bearing 40. The pawl lever 33 has a double pronged yoke 42 and an extension 44 extending beyond the yoke. The yoke 42 is adapted to engage the shoulder of a shouldered groove 46. The shouldered groove 46 is a part of a stub shaft 48 which is slidably and rotatably mounted on the back roll drive shaft 22 and has a clutch face 58 and a ear 52 fixedly attached thereto. A spring 53 is slidably mounted on the back roll drive shaft 22 between the clutch face 50 and a clutch face 54, and is normally adapted to urge said clutch faces apart and cause disengagement. The gear 52 is driven by a gear T2 which is axially attached to a gear 14. The

gears

12 and 14 are supported for rotation by a mounting 16, said gear 12 in turn is driven by a gear 18 fixedly attached to the front roll drive shaft [4.

The clutch face as is fixedly attached to the back roll drive shaft 22 and is adapted to drive the back roll IS on engagement with the clutch face 50.

An elongated connecting rod 56 is rotatably mounted in a bearing 58 to the frame 59. of the spinning frame. The rod 56 extends across the spinning frame and has one end 60 formed upwards at an angle to its horizontal axis. This formed end 68 of the rod vhas a .bifurcate shape 6| and isadapted to-be engaged by the extension 44 of the pawl lever 38. The other end of the rod.

56 is formed to constitute a double pronged yoke 62. The yoke 62 is adapted to engage the shoulder of a shouldered groove 64. The shouldered A spring 651s slidablymountedon the back roll drive shaft 24 between the clutch face 68 and a clutch face 12, and is normally adapted to urgesaid clutch faces apart and cause disengagement.

The gear 18 is driven by a gear 80 which is axially attached to a gear 82. The

gears

80 and 82 are supported for rotation by .a mounting 84,

said gear 82 in turn is driven by agear 86 fixedly attached to thefront roll drive shaft I6.

4 studs 36. The studs 36 are interchangeable to the pattern of slub desired. When the cam 34 is rotated, the raised studs 36 contact and pivot the pivotally mounted pawl lever 38. This motion actuates the yoke 44 against the shoulder of the shouldered groove 46, and thereby forces the clutch face 58 which is fixedly attached to the stub shaft 48 and is driven by the gear 52 at a speed in excess of the shaft 22, into engagement with the clutch face 54, thereby increasing the speed of the back roll drive shaft 22 and the back roll l8. The extension 44 of the pawl lever 38 is simultaneously actuated into contact with the fork 5| on the lever end 60 of the elongated connecting rod 56. This contact causes the rod 56 to rotate, and thus actuates yoke 62 against the shoulder of the shouldered groove 64. This motion urges-the clutch face 68, which is fixedly attached to the stub shaft 66 and driven by the gear ill at a speed in excess of the shaft 24, into engagement with the clutch face 12. The engagement'of clutch face 68 with clutch face 12 increases the speed of the back roll drive shaft 24 and the back roll 2!] and causes the slub in the manner as well known to those skilled in the art.

As the cam 34 continues its rotary movement the raised studs in turn pass the pawl lever 38 and allow said pawl lever 38 to assume its normal position. the clutch faces and 68 whereby the springs 53 and 55 force said clutch faces 58 and 68 out of engagement with the clutch faces 54 and 12 and allow the

back rolls

22 and 24 to resume their normal speed.

The spacing and timing between the engaging and disengaging motions are determined by the number and arrangement of the raised studs 36 on the cam 34.-

As can be understood by the preceding explanation, any slub motion as applied to the first clutch and back roll drive shaft is simultaneously applied to the second clutch and back roll drive shaft, thereby causing identical slub on h each side of the frame.

The clutch face 12 is fixedly attached to the back roll drive shaft and is adapted to drive the.

back roll 20 on engagement with the clutch face Figure 3 shows a fragmentary detail of the teeth on the clutch faces 12, 68, Mandi-54 illustrating the backing off or difference in angle of the engaging teeth, the angle X is preferably 55 and the angle Y preferably 12. This backing off of the-clutch teeth is to allow .the meshing teeth of the opposing clutch faces 50 and 54, or 68 and 12 -to disengage instantly onreleaseby the engaging means. Normally the perpendicular faces of the teeth have a tendencyito grip due to the forcing together of the parallel 90 or perpendicular faces of the meshing clutch teeth by the additional speed of the slub motion drive.

Operation When the spinning frame is set in motion the front roll drive shafts l4 and i6 and the back

roll drive shafts

22 and 24 take up their normal speed as usual from the drive of the frame, .(not illustrated) through a chain of gears, driving gear 26, gear 28, gear 30, gear 32, thus rotating the cam .34 which is adapted to carry a plurality of raised The front roll drive shaft l4 operates A further advantage ofthe present device is that spinning frames in general require slub motions for each side of the machine. plicants invention one slub motion sufiices and is made to operate both sides of spinning frame.

The sub-titles used throughout the specification are merely to simplify reference thereto and should otherwise be disregarded.

I claim:

1. In combination with a spinning frame having companion pairs of driven front and back rolls, one pair at each side of the frame, a slub motion apparatus, including a cam mounted for rotation, means for rotating said cam, a first clutch at one side of the machine, a second clutch at the other side of the machine, an elongated connecting rod mounted for rotation on its axis and extending from one side of the frame to the other, a yoke on one end of the rod adapted to engage said second clutch, the other end of said rod having a fork and being formed to provide for rotary leverage, a pivotally mounted pawl lever, said pawl lever including a yoke adapted to engage said first clutch, a second extension for engaging said fork and a first extension engageable by said cam, whereby a. motion is transmit- This motion releases the pressure on' In the ap- 2. In combination with a spinning frame having companion pairs of driven front and back rolls, one pair at each side of the frame, a slub motion apparatus including, a cam mounted for rotation, means for rotating said cam, a first clutch at one side of the spinning frame, a second clutch at the other side of the spinning frame, a pivotally mounted pawl lever, said pawl lever having a lever arm adapted to engage said cam, a yoke adapted to engage said first clutch and an extension extending beyond said yoke, an elongated connecting rod rotatably mounted and extending from one side of the spinning frame to the other, said connecting rod having one end formed upwards at an angle to its horizontal axis with the other end having a yoke, said formed end of the connecting rod having a bifurcate shape adapted to engage the extension of said pawl lever, said yoked end of the connecting rod being adapted to engage said second clutch, whereby a motion is transmitted through said pawl lever urging said first clutch into engagement and simultaneously through said connecting rod and yoke urging said second clutch into engagement in the same direction as said first clutch.

3. A slub motion apparatus adapted for use on a spinning frame having companion pairs of back rolls and front rolls, a pair of back roll drive shafts and a pair of front roll drive shafts, and including, a pair of slub drive connections for said back roll drive shafts, a first clutch at one side of the spinning frame, a second clutch at the other side of the spinning frame, said first and second clutches bein adapted to engage said slub drive connections, a rotatably mounted cam, means to rotate said cam, a pivotally mounted pawl lever, said pawl lever having a lever arm adapted to engage said cam, a yoke adapted to engage said first clutch and an extension projecting beyond said yoke, an elongated connecting rod rotatably mounted and extending substantially from one side of the spinning frame to the other, said connecting rod having one end formed upwards at an angle to its horizontal axis with the other end having a yoke, the formed end of the connecting rod having a bifurcate shape adapted to be engaged by the extension of said pawl lever, the yoked end of said connecting rod being adapted to engage said second clutch, resilient means adapted to urge said first and second clutches out of engagement, whereby said pawl lever upon actuation by said cam is adapted to urge said first clutch into engagement and simultaneously actuate the connecting rod, said connecting rod through said yoke urging said second clutch into engagement at the same time and in the same direction as said first clutch.

4. In combination with a spinning frame having companion pairs of driven front and back rolls, one pair at each side of the frame, includin a cam mounted for rotation, means for rotating said cam, a pivotally mounted pawl lever, a first clutch at one side of the machine, a second clutch at the other side of the machine, an elongated connecting rod extending across the machine, said elongated rod being rotatably mounted on its longitudinal axis and having a yoke at one end with the other end being formed to provide for rotary leverage, whereby said rod upon being actuated by said pawl lever is adapted to rotate and urge said second clutch into engagement simultaneously and in the same direction as said first clutch.

JOHN GREEN KERSHAW.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 344,611 Applegate June 29, 1886 2,384,582 Wildhaber Sept. 11, 1945 FOREIGN PATENTS Number Country Date 493,974 Great Britain Oct. 18, 1938 746,452 France Mar. 7, 1933