US1619985A - Spinning frame - Google Patents

Description

1,619,985 March 8 1927 c. MQRTON SPINNING FRAME Filed May 11, 1926 2 sheetssheet 1 (jg Y 9 YfiWM ATTORNEYS.

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Patented Mar. 8, 1927.

PATENT oFFIcEl.

CHARLES MORTON, 0F IPA'WTUCKE'I, RHODE ISLAND.

SPINNING FRAME.

Application filed May 11, 1926. Serial No. 108,262.

This invention relates to improvements in spinning frames; and has for its object to provide means whereby the draft rolls of relatively small diameters may be employed and set closel together to materially reduce the distance etween the centers or nips of the back and front rolls, and also to provide a practical means for driving rolls set so closely together that an increased draft on the roving may be obtained and a relatively coarse roving drawn down to a relatively fine yarn and at the same time produce a yarn product of uniform size and quality.

With'these and other objects in view the invention consists of certain novel features of construction, as will be more'fully described, and particularly pointed out in the appended claims:

In the accompanying drawings:

Figure 1 is a top view showing a set of driving rolls and an improved means for driving the same.

Figure 2 is a view from the rear showing an arrangement of driving gears includin the cross or drive shaft which transmits the power from one end of the back roll across the machine to drive the intermediate roll from its opposite end.

Figure 3 is an end View showing one arrangement of gearing whereby the intermediate shaft is driven from its end opposite the head end of the machine through the cross shaft.

Figure 4 is a diagrammatic view showing the general arrangement of driving mechanism.

It has heretofore been found in the operation of spinning frames of this character, necessary to set the draft rolls relatively wide apart in order to be ableto mount driving gears on the ends thereof of sufiicient size and strength to operate the roll in a practical way, and by this construction the distance between the centers or nips of the back and front rolls must necessarily be so far apart as to materially limit the amount of draft that could be made in the roving, thereby necessitating the use of relatively fine hanks of roving to prevent the same from breaking down during the drawing operation, which would form thick and thiniplaces in the yarn and so produce a'yarn that is ununiform and unsatisfactory.

rangement of mechanism which permits the use of draft rolls of smaller diameters than could heretofore be used and permits these rolls to be run very closely together and so reduce the distance between the nips or centers thereof to the very minimum. By this construction, I am permitted to emplo a greatly increased draft between the bacg and front rolls and consequently I am enabled to use a relatively coarse hank roving. The intermediate roll I employ only as a support for the roving during the drawing action which prevents the roving from breakmg down during the drawing operation, thereby permitting a fine yarn of a uniform size and quality to be obtained from the coarser roving and so by eliminating the use of a finer hank roving I reduce the cost of preparing this fine roving, which reduction g in some cases reaches as high as twenty percent; and the following is a detailed description of the present embodiment of my invention and showing one arrangement of mechanism by which these advantageous results may be obtained.

l/Vith reference to the drawings, 10 designates the bottom front roll, 11 the intermediate roll and 12 the back roll of the dif ferent sets of draft rolls, the relative positions of which are best illustrated in. Figure 3. Upper rolls 13, 14. and 15 are arranged to cooperate in the usual Way with these lower rolls to form nipping points between each pair for the roving. All these sets of rolls are mounted in the usual way in the frames 16.

My improved set of rolls is of smaller diameter than those usually employed in spinning machines of this character and are set closer together than is usual for such draft rolls and in order to be able to gear these lower rolls together to run in the required time with each other, I employ the usual main drive gear 17 on the front roll 10 at the head end of the machine, the end of this roll shaft is run in the bearing 18 and is provided with a pinion 19, which pinion serves to drive the back roll 12 through a train of gears which includes the la r e gear 20, pinion 21 and the gear 22 on tie end of the back roll 12.

()wing to the factthat these rolls are set so closely together, it is found impossible to drive the intermediate roll from the head end of the machine and at the same time obtain sufficient size and strength in these gears to drive the rolls in a practical way. There fore, in order to drive this intermediate roll 11, which in some cases may be driven approximatel 10% faster than the roll 12, I have provi ed an independent cross shaft 23 which is connected at the head end of the machine to the back roll through gears 24 and 25. This cross shaft extends along the back of the machine and is connected at its opposite end through gears 26 and 27 to the intermediate shaft 11.

When it is desired to change the speed of the back roll relative to the front roll, it is only necessar to change the pinion 21 which can be done by adjusting the bracket 28 on its bearing 18 to cause this pinion to again properly mesh with gear'22 on the back roll, and it will be seen by this arrangement that any relative change in speed of the back roll will also make a corresponding change of speed in the intermediate roll 11.

In mountin this cross shaft 23, I preferably suspend a pair of bearings 29 by arms 30 from the ears 31 on the stands 32. By this construction and arrangement of gearing it is obvious that I may reduce the distance between the nips of the front and back rolls 10 and 12 to the very minimum and use the middle rolls as a carrier only. In other words, by having the rolls widely spaced, a relatively fine hank roving must be employed to produce a yarn of a given size and quality, but by reducing the space between the nips of the rolls, a greater draft may be employed and I am enabled to produce the same uality and size of yarn from a much coarser ank roving thus eliminating one distinct step in operation which has heretofore been necessary to reduce the roving from the coarse hank-to the fine hank size in order to obtain a satisfactory even yarn, by which arrangement I obtain a mate rial saving in the cost of yarn production which in some cases figures as high as twenty percent.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. In a spinning frame front and back sets of draft rolls, means for driving said sets at different relative speeds, a set of intermediate rolls between said sets of back and front rolls and positioned with their working surfaces to run just clear of those of said back and front sets of rolls, the distance between the centers of said adjacent sets of rolls being insufficient to permit of two adjacent sets of rolls being driven directly one from the other, and means for driving said intermediate set indirectly from those of another set.

2. In a spinning frame front and back sets of draft rolls, means for driving said sets at different relative speeds, a set of intermediate rolls spaced substantially equally distant between said back and front rolls, said sets of rolls being so positioned-relative to each other that their Working surfaces run just clear of each other the distance between the centers of said adjacent sets of rolls being insufiicient to permit of two adjacent sets of rolls being driven directly one from the other, and means for driving said intermediate set at a speed greater than that of said back set of rolls indirectly from those of another set.

3. In a spinning frame, a group of draft rolls comprising a pair of front, back and intermediate rolls arranged in closely spaced relation, gears for driving said back roll and front rolls at different relative speeds, and

a shaft driven to run at a fixed rate of speeds relative to said back rolls and through which one of said pairs of intermediate rolls is driven from the end opposite the drive end of the said back and front rolls.

4. In a spinning frame, a group of draft rolls comprising pairs of front, back and intermediate rolls arranged in closely spaced relation, gears for driving said front and back rolls one from the other at one end thereof to obtain the desired draft between them, and a cross shaft geared to be driven from the same end as said front and back rolls to run at a given relative rate of speed and said shaft being geared to drive one of said intermediate rolls from the opposite end thereof.

5. In a spinning frame, a group of draft rolls comprising pairs of front, back and intermediate rolls arranged in closely spaced relation, gears for driving said front and back rolls at predetermined speeds, a shaft driven in time with the back roll gears for transmitting motion from said shaft to said intermediate rolls, and means whereby the gear ratio between the front and back rolls may be readily changed to vary the, amount of draft between them.

6. In a spinning frame, a group of draft rolls comprising pairs of roll stands, front, back and intermediate rolls journaled in said stands, a train of gears including change gears for driving said back and front rolls in time with each other, a cross shaft also journaled in said stands, one end of said shaft being geared to the driven end of the backroll and eared adjacent its opposite end to drive said intermediate rolls.

7. In a spinning frame, a group of draft rolls comprising a pair of front, back and intermediate rolls arranged in closely spaced relation, gears for driving said front and back rolls one from the'other at one end thereof to obtain the desired draft between them, a shaft extending lengthwise of the frame, means for driving said shaft from the head end thereof, and means for transmitting power through said shaft to the opposite end of the intermediate r011.

In testimony whereof I affix my signature.

CHARLES MORTON.

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