US2249408A - Pressure applying means for spinning frames - Google Patents

Description

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PRESSURE APPLYING MEANS FOR 'SfI-NNING FRAMES Filed Oct. 21, 1938 2 Sheets-Sheet 1 WEST July 15, 1941.

Patented July 15,

SPINNING FRAMES George West, Whitinsville, Mass., assignor to Whitin Machine Works, Whitinsville, Mass., a corporation of Massachusetts Application October 21, -1938, Serial No. 236,253

This-invention relates to spinning frames, such as are commonly used in the production of cotton yarn. In such frames, the rovings are passed between successive pairs of drawing and top rolls by which they are drafted to the size required to yield the, desired weight or number of yarn.

Drafting pressure has been commonly applied to the rolls by suspended weights, and the pressure has-been distributed in the desired ratio to the front, middle and-back top rolls through top roll saddles to which the weight has been connected by a weight lever and a stirrup or strap.

It is necessary to relieve, the pressure on. the

top rolls from time to time-to permit cleaning.

of the top rollsor scouring of the drawing rolls, and it is also desirable, to. relieve th pressure on the top rolls when the machine is to remain idle for any considerable time. i

It is the general object of my invention to provide improved means for applying pressure to the top rolls and for quickly and conveniently releasing the pressure when desired.

I also provide improved pressure-applying and pressure-releasing means which leave the roller beam and creel board substantially unobstructed, so that they maybe easily kept clear of dirt and lint.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Preferred forms. of the invention are shown in thedrawings, in which Fig. 1 is a sectional end elevation of pressureapplying means embodying my improvements;

Fig. 2 is a detail view illustrating the operation of the releasing means;

Fig. 3 is a detail plan view, looking in the die Fig. 11 is a front elevation, partly in section,

and looking in the direction of the arrows II in Fig. 2.

Referring to Figs. 1 to 5, I have shown parts of a spinning frame including a roller beam Ill 2 Claims. (cue-135) supporting a plurality of roll stands II which provide bearings for a front drawing roll l2, a middle drawing roll I4 and a back drawing roll l5. Top rolls 20, 2| and 22 rest on the rolls i2, 14,-. and I5 respectively, and are held for rotation in the position shown .by usual guide means not.

shown.

Top roll saddles are provided for each set of top rolls and these comprise front saddles25 and rear saddles 26. The-front end of the front saddle 25 rests on the front top roll 20 and applies; pressure thereto, while the back saddle 26 rests on the middle and back rolls 2| and 22 and applies pressure to said rolls in a predetermined ratio.

The parts thus far described are of the usual construction and in themselves .form no part of my present invention which relates particularly to improved means for applying pressure to the top roll saddles and for conveniently relieving":

.top rolls, I provide a spring 30 mounted on a hook 3i which is slidable in a bracket 32 secured by'a bolt 33 to the under side of the roller beam [0. A collar 35 on the hook 3| forms a stop to limit downward movement of the hook.

The spring 30 is centered in cup washers 3B position on the hook by lock nuts 38. The hook 3| extends upward through a slot 39 in the usualf- I removable creel board 40 and engages the lower ,7

end of a stirrup or strap 4 I side walls 46 of the lever 43.

The pin 44 also extends through slots 50 (Figs.

4 and 5) in the side walls 5| and 52 of a block53.

The block 53 is preferably made of sheet metal" with slotted end- walls 54 and 55 which receive an adjusting screw 56 having a head 51 and a' collar 58. When the parts are assembled, the slotted end wall 55 extends between the head 51 and the collar 58.

The side walls 5| and 52 (Fig. 5) have but turned lower flanges 59, and the side wall 52- is pressed to the position shown in Fig. 5 after the screw 56 has been assembled in the block. The screw 56. is threaded in a lug 60 (Fig. l) on the front saddle 25 and provides means for adjusting'f the block 53 forward or rearward on the front saddle 25, to thereby increase or decrease the proportion of weight carried by the front top roll 20.

one of which engages the under side of the bracket 32 while the other is. held in adjusted allowing the collar 35 to engage the bracket 32..

This relieves the spring pressure, so that the front top roll 20 or the back top roll 22 may be freely removed for cleaning, or the stirrup 4i may be unhooked from the hook 3| and the front and back saddles and the stirrup 4i may then be removed as a unit, thus freeing all of the top rolls.

If desired, the releasing movement of the lever 43 maybe continued to the dotted line position shown in 'Fig. 2, in which position the clearer boards (not shown) may bereplaced above the rolls if'the machine is to stand idle.

nected by a hook}! to the stirrup 4|, substantially as in Fig. 7. Pressure is applied to the lever ll, however, by a weight W' suspended from the free end of the lever 80 by a link a.

The construction shown in Fig. 6 more closely resembles the usual commercial structure now in use. while the constructions shown in Figs. 1, '7 and 8 have the advantage of leaving the upper surface of the roller beam Ill and creel board 48 substantially unobstructed.

The construction shown in Fig. 1 has .the further advantage that the springs 30, hooks 3| and brackets 32 may be assembled and the springs adjusted as to pressure, before these parts are inserted in the spinning frame. Accurate and uniform setting of all of the springs 30 may thus be conveniently accomplished.

All forms of my invention have the very great advantage that the top roll pressure can be re- In Figs. 6, '7 and 8 I have shown modified constructions for applying pressure to the stirrup 4|. In Fig. 6 I have shown a weight W suspended by a hook 18 from a weight lever 'll having its front end hooked into an adjustable lever screw 12. The lever H is provided with a hook 14 to receive the lower end of the stirrup 4|, and is also provided with a lug ll which prevents accidental disengagement of the 'stirrup fromthe lever when the 'pressure'is released. The stirrup may be readily disengaged manually from the lever Ii, however, as shown in Fig. 10, if the stirrup and top roll saddles are to be removed as a unit. The .eye of the hook 18 provides a shoulder it which acts as'a stop to support the upright when the hook I4 is disengaged from the stirrup 4|.

This type of lever is very useful not only in the constructionherein shown, but also in the lieved from above the rolls and without interfer--v ence with either the rovings or the yarn.

Having thus described my invention and the advantages thereof. I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is: l. Pressure-applying means for spinning frames comprising a' stirrup, means to tension said stirrup, a front top roll saddle, a block mounted on said saddle, means to adjust said block longitudinally of said saddle and a tensionapplying member havinga pivotal lost-motion connection with said bloclfand having a pivotal connection with the upper end of said stirrup,

said member resting upon and being supported directly by said block independently of said lost motion connection.

2. Pressure-applying means for the top rolls of a spinning frame comprising a stirrup, means to tension said stirrup, a front top roll saddle, a block mounted for longitudinal adjustment on said saddle, and a lever having a pin-and-slot connection with said block and having a pivotal connection with the upper end of said stirrup, said lever having a portion directly engaging said block with a cam action to apply pressure to the top rolls.

- GEORGE WEST.

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