US2463604A

US2463604A - High-speed traverse

Info

Publication number: US2463604A
Application number: US751756A
Authority: US
Inventors: Ivanhoe P Denyssen
Original assignee: American Viscose Corp
Current assignee: Akzo Nobel UK PLC
Priority date: 1947-06-02
Filing date: 1947-06-02
Publication date: 1949-03-08
Anticipated expiration: 1966-03-08

Description

' l. P. DENYSSEN 2,463,604

HIGH-SPEED TRAVERSE v 2 Sheets-Sheet 1 INVENTOR. IVANHOE 1-? DENYSSEN March 8, 1949.

Filed June 2, 1947 March 8, 1949. P. DENYSSEN 2,463,604

HIGH- SPEED TRAVERSE Filed June 2, 1947 2 Sheets-Sheet 2 JNVENTOR. lVAA/HOE F? DENY$$EN Patented 8, 1 949 2,463,604 I men-sperm ranvaasn Ivanhoe P. Denyssen, Lansdowne, Pa., assignor to American Viscose Corporation, Wilmington, Del., a corporation of Delaware Application June 2, 1947, Serial-No. 751,756

7 Claims. (01. 74-50) This invention relates to traversing mechanlsms; more particularly this invention relates to a traversing mechanism that is employed on a spinning machine used in the manufacture of artificial filaments.

According to the spinning process for the manufacture of viscose rayon yarn, the freshly formed yarn leaving the spinning bath is collected in package form in a rotating spinning bucket or wound on bobbins. The fully wound package is subjected in later operations to treatment with various liquids by pressure or suction means to yield a purified yarn suitable for uses in the textile art. It is necessary that the yarn package be uniformly porous and liquid permeable so that this liquid treatment may proceed to a uniform extent and in a rapid and economical manner.

A package is fully processed only after all of its regions have been completely treated. There are two distinct regions in the cakes cross section: one, the middle portion and two, the end extremities. To be ideal, the entire cross section should process at an equal rate, however in the conventional method of cake forming the middle portion responds more promptly than the end portions. The end portions, owing to their greater density,-determine the processing time requirements. The greater density is the result of a slow reversal which is a result of deviating from a uniform straight line motion at the re-' versal points in the cam to reduce the force of reversal or shock.

The present invention overcomes this difficulty by reversing more rapidly at the end of the stroke. In the new method of operation, uniform straight line motion is attained by the compounding of a simple harmonic motion and a correction cam. The force at reversal is thus divided up between the eccentric bearing of the simple harmonic motion and the correction cam.

The principal object of the present invention is to provide a traverse mechanism that will effectively manufacture a wound package of more uniform density from end to end in a spinning bucket, or on a bobbin, or the like.

Another object of the present invention is to provide a traverse mechanism that will operate at high speeds to conform to increased spinning speeds.

Other objects and advantages of the invention will appear from the following detailed description of an embodiment thereof in a device for reciprocating a strand distributing member taken in connection with the accompanying drawings in which the same reference numerals are applied 2 to identical parts in the several figures, and in which Figure 1 is a front view partly in section of a preferred embodiment of the present invention taken along line I--I in Figure 2;

Figure 2 is an elevational view partly in section taken along line IIII of Figure 1;

Figure 3 is a view of Figure 2 looking along line III-III;

Figure 4 is an elevational view partly in section of a spinning machine with an embodiment of the present invention mounted in place.

Figures 5 and 6 illustrate two modifications of the cam track-employed in the present invention.

In the embodiment of the invention to be described herein, a spur gear I is rotatably mounted on the stud shaft 2 by the bearing 3, said stud shaft being fixedly secured in the housing 4. Rotation is imparted to the spur gear I by the driving pinion 5. Rotatably mounted on the hub of the spur gear by the bearing 6 is a crank arm i which has gear teeth 8 on part of its circumference. These gear teeth 8 mesh with teeth on a sector arm 9 which is pivoted on a pin Hi secured in the flanged portion of the spur gear 6. An eccentric arm Ii carrying a cam follower I2 is fixedly secured to the sector arm El so that it extends at a predetermined angle therefrom. The cam follower'travels in the cam track it in a ring I3A which is adjustably secured to the back plate It of the housing a.

A pin l5 connected to the outer end of the crank arm and extending substantially parallel to the stud shaft 2 has an eccentric member or sleeve 30 rotatably mounted thereon. The eccentric member 30 has a slide block Hirotatably mounted thereon. As shown the pin I5 is threaded on its free end and a nut 29 is screwed thereon to secure the eccentric 30 and the slide block It in place. The block l6 slides in two grooves or tracks I! in the opposed faces of the yoke I ll. As the crank member 1 is rotated by sector 9 and gear I, the block I6 imparts a reciprocating motion to the yoke. Attached to the base of the yoke l8 and reciprocating therewith is a traverse member l9 which is secured to the traverse rail carrying the funnel guides for pot spinning machines or the thread guides for bobbin machines. Attached to the top of the yoke l8 and reciprocating therewith is a guide member 2| which serves, with the aid of the traverse member, to restrict the movement of the yoke to its path of reciprocation. The traverse member i9 and the guide member 2| are slidably mounted in the

bearing members

20 and 22 respectively. Al-

though the embodiment of the present invention shows the traverse mechanism situated on top of the spinning machine, it can easily be seen that the actuating mechanism could be placed on the machine below the spinning funnels or other guides or it may be reoriented so that Figure 1 would represent a plan view thereof and the guides or bobbins could be carried at spaced intervals along member l9.

As shown more particularly in Figure 4, reference character 25 indicates a cylindrical traverse housing in which the

spring members

26 and 21 are positioned. The piston-like member 28 fixedly secured to the traverse member I9 separates the spring members and provides a bearing surface for each. These spring members act to absorb the energy of reversal by substantially eliminating the transmission of the force due to the weight of the funnel frame 23 to the cam follower member l2.

As illustrated the stroke of the traverse member is at a maximum. However, the stroke of the traverse member may be varied by loosening the locking nut 29 and turning the eccentric member in either direction until the desired index 32 mates with the centering mark 3| on the slide block (6. With an adjustment of'this sort it is possible to utilize spinning buckets of different depths or bobbins of different lengths in conjunction with the present invention.

After the eccentric member has been locked in place it is necessary to make a timing correction on the back of the housing. This is accomplished by loosening the

locking nuts

33, 34, 35 and 36 on the

lugs

31, 38, 39 and 40 respectively. The thereby loosened cam track or correction cam is rotated by turning the screw head 4| in either direction. This action rotates a pinion gear 42 which meshes with the gear teeth 43 cut on the inner periphery of the cam track. The cam track is then set in adjusted position by tightening

nuts

33, 34, 35, and 36. A stationary pointer 45 indicates, on the scale 44, the relation of the cam track to the position of the eccentric member. The scale of the eccentric member and the correction cam are so calibrated that when the eccentric member is rotated-to a certain graduation, the correction cam should be rotated to the same graduation on its scale. This relative change in position of the correction cam assures quick reversal at opposite ends of the stroke for any corresponding change in the length of stroke of the traverse member.

Improved permeability of the formed cake or other package is assured by the ofisets 46 and 41 in the cam track [3. These offsets eliminate the dwell at the end of each stroke that is inherent in the use of a circular cam track and insure instead a quick reversal at each end of the funnels stroke. With the elimination of this dwell the density at the top and bottom of the cake is decreased and a cake of more uniform density from end to end is produced.

Figures and 6 illustrate two modified cam track designs that may be employed in the present invention. It is often desirous to utilize different winding patterns in the processing of wound packages since the permeability of the cake or bobbin is dependent on the winding pattern. It is possible to change this pattern by increasing the speed of the traverse, which increases the helix angle, or by changing the loci of the funnel exit. The latter is accomplished by changing the shape of the cam track. As shown, Figure 5 represents a track that is generally elliptical on the forward stroke and generally circular on the return stroke. This construction will produce a wound package which has a large winding helix on the forward stroke and a smaller winding helix on the return stroke. Figure 6 illustrates a cam track having three main convolutions. Although it has been shown with only three convolutions it is to be understood that any number may be employed. These convolutions cause the windings to move progressively forward and return, but causes them to wind back on themselves at predetermined intervals with a smaller stroke than the maximum overall stroke of the traverse menber.

Although this invention has been described with reference to improvements shown, it will readily be appreciated that numerous changes may be made without departing from the spirit and scope of the invention as defined in the appended claims.

I claim:

1. In a traver se mechanism, a traverse member, a rotatable crank arm having gear teeth on a portion of its outer periphery, a Scotch yoke, a block slidably mounted in said yoke, the slide block being connected to the crank arm and the yoke being connected to the traverse member, eccentric means in the slide block for adjusting the stroke of the traverse member, means for rotating the crank arm comprising a. driving pinion, a gear driven by the pinion, gear means pivotally mounted on the gear and meshing with the gear teeth on the crank arm, a cam, means for connecting the cam and the gear means for varying the rotation of the crank arm at predetermined intervals during each cycle of revolution, and means for adjusting the angular relationship between the cam and the axis of rotation of the crank arm.

2. In a traverse mechanism, a traverse member, a rotatable crank arm having gear teeth on a portion of its outer periphery, a Scotch yoke, a block slidably mounted in said yoke, the slide block being connected to the crank arm and the yoke being connected to the traverse member, eccentric means in the slide block for adjusting the stroke of the traverse member, means for rotating the crank arm comprising a driving pinion, a gear driven by the pinion, a sector gear pinned to the gear and meshing with the gear teeth on the crank arm, a cam, means for connecting the cam and the sector gear for varying the rotation of the crank arm at predetermined intervals during each cycle of revolution, means for adjusting the angular relationship between the cam and the axis of rotation of the crank arm.

3. In a traverse mechanism, a traverse member, a rotatable crank arm having gear teeth on a portion of its outer periphery, a Scotch yoke, a block slidably mounted in said yoke, the slide block being connected to the crank arm and the yoke being connected to the traverse member, eccentric means in the slide block for adjusting the stroke of the traverse member, means for rotating the crank arm comprising a driving pinion, a gear having the same axis of rotation as the crank arm driven by the pinion, a sector gear pinned to the gear and meshing with the gear teeth on the crank arm, a cam, means for connecting the cam and the sector gear for varying the rotation of the crank arm at predetermined intervals during each cycle of revolution, means for adjusting the angular relationship between the cam and the axis of rotation of the crank arm.

4. In a traverse mechanism, a traverse member,

a rotatable crank arm having gear teeth on a portion of its outer periphery, a Scotch yoke, a block slidably mounted in said yoke, the slide block being connected to the crank arm and the yoke being connected to the traverse member, eccentric means in the slide block for adjusting the stroke of the traverse member, means for rotating the crank arm comprising a driving pinion, a gear having the same axis of rotation as the crank arm driven by the pinion, a geared sector pinned to the gear and meshing with the crank arm, a cam, a cam follower, an eccentric arm connecting the cam follower and the sector at a predetermined angle therefrom for varying the rotation of the crank arm at predetermined intervals during each cycle of revolution, means for adjusting the angular relationship between the cam and the axis of rotation of the crank arm.

5. In a traverse mechanism, a traverse member, a rotatable crank arm having gear teeth on a portion of its outer periphery, a Scotch yoke, a block slidably mounted in said yoke, the slide block being connected to the crank arm and the yoke being connected to the traverse member, eccentric means in the slide block for adjusting the stroke of the traverse member, means for rotating the crank arm comprising a driving pinion, a gear having the same axis of rotation as the crank arm driven by the pinion, a geared sector pinned to the gear and meshing with the crank arm, a cam, a cam follower, an eccentric arm connecting the cam follower and the sector at a predetermined angle therefrom fixedly secured at the point where the sector is pinned on the gear for varying the rotation of the crank arm at predetermined intervals during each cycle of revolution, means for adjusting the angular relationship between the cam and the axis of rotation of the crank arm.

6. In a traverse mechanism, a traverse member, a rotatable crank arm having gear teeth on a portion of its outer periphery. a Scotch yoke, a block slidably mounted in said yoke, the slide block being connected to the crank arm and the yoke being connected to the traverse member, eccentric means in the slide block for adjusting the stroke of the traverse member, means for rotating the crank arm comprising a driving pinion, a gear having the same "axis of rotation as the crank arm driven by the pinion, a geared sector pinned to the gear and meshing with the crank arm, a cam, a cam follower, an eccentric arm connecting the cam follower and the sector at a predetermined angle therefrom fixedly secured at the point where the sector is pinned on the gear for varying the rotation of the crank arm at predetermined intervals during each cycle of revolution, means for angularly adjusting the angular relationship between the cam and the axis of rotation of the crank arm.

7-. In a traverse mechanism, a traverse member, a rotatable crank arm having gear teeth on a portion of its outer periphery, a Scotch yoke, a

block slidably mounted in said yoke, the slide block being connected to the crank arm and the yoke being connected to the traverse member, eccentric means in the slide block for adjusting the stroke of the traverse member, means for rotating the crank arm comprising a driving pinion, a gear having the same axis of rotation as the crank arm driven by the pinion, a geared secton pinned to the gear and ,meshing with the crank arm, a stationary cam, a cam follower, an eccentric arm connecting the cam followerand the sector at a predetermined angle therefrom fixedly secured at the point where the sector is pinned on the gear for varying the rotation of the crank arm at predetermined intervals dur ing each cycle of revolution, means for angularly adjusting the angular relationship between the cam and the axis of rotation of the crank arm.

IVANHOE P. DENYSSEN.

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

UNITED STATES PATENTS Sacchini Jan. 15, 1946 Certificate of Correction Patent No. 2,463,604. March 8, 1949.

IVANHOE P. DENYSSEN It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Column 6,

lines

22 and 23, claim 7, for secton read sector;

and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 11th day of October, A. D. 1949.

THOMAS F. MURPHY,

Assistant Oonuniaaioner of Patents.