US2300188A - Pressure applying means for spinning frames - Google Patents

Description

Oct. 27, 1942. v G. wEsT 2,300,188

PRESSURE- APPLYING MEANS FOR SPINNING muss Original Filed Oct. 21, 1938 Patented Oct. 27, 1942 PRESSURE APPLYING MEANS FOR SPINNING FRAMES George West,. Whitinsville, Mass, assignor t Whitin Machine Works, Whitinsville, Mass, a corporation of Massachusetts Original application'October 21, 1938,. Serial No.

236,253. Divided and this application-December 23, 1940, Serial No. 371,269

1 Claim.

This application is a division of my prior application Serial No. 236,253, filed October 21, 1938', and 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 top 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 weights have been connected by weight levers and stirrups or straps.

It is the general object of my present invention to provide an improved construction by which spring pressure can be conveniently and effectively applied to saddles and top rolls in a spinning or drawing frame.

A further object is to provide a unitary device for applying spring pressure to saddles and top rolls, so constructed that the spring setting will not be disturbed by removal of the device from its operative position.

I also provide improved pressure-applying means which leaves the roller beam and creel board substantially unobstructed, so that they may be 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 claim.

A preferred form of the invention is shown in the drawing, 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 certain pressure-releasing means;

Fig. 3 is a detail plan view, looking in the direction of the arrow 3 in Fig. 1;

Fig. 4 is a sectional side elevation, taken along the line 4-4 in Fig. 3;

Fig. 5 is a sectional end view, taken along the line 5-5 in Fig. 4; and

Fig. 6 is a front elevation, partly in section, and looking in the direction of the arrow 6 in Fi 2.

Referring to the drawing, I have shown parts of a spinning frame including a roller beam I0 supporting a plurality of roll stands II which provide bearings for a front drawing roll I2, a middle drawing roll I and a back drawing roll l5. Top rolls 20, 2| and 22 rest on the rolls I2, I4 and I5 respectively, and are held for rotation in the position indicated by usual guide means, not shown.

Top roll saddles are provided for each set of top rolls and th'ese comprise front saddles 25' L stirrups for the top roll saddles.

For the purpose of thus applying pressure to a saddle, I provide a spring 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 ID. 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 36, one of which engages the under side of the bracket 32, while the other is held in adjusted position on the hook by lock nuts 38. The hook 31 extends upward through a slot 39 in the usual removable creel board 40 and engages the lower end of a stirrup or strap 4|.

While my improved spring tension unit may be used with any usual top roll saddles and stirrup connections, I have shown the invention as used with certain special stirrup connections to which it is Well adapted, and these connections will now be described.

The upper end of the stirrup 4| is forked to provide cars 42 (Fig. 1) which are pivoted to a cam lever 43 by a pin 44 (Fig. 6) secured in the ears 42 and extending through openings in the 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 block 53. 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 outturned 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. 1) on the front saddle 25 and provides means for adjusting 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.

The cam lever 43 is shown in normal running position in Fig. 1, with the pressure of the spring 30 applied through the cam surfaces 62 to the out-turned flanges 59 of the block 53, which flanges are supported on the front saddle 25.

When it is desired to relieve the pressure on the top rolls, the lever 43 is swung to the position shown in Fig. 2, thus lowering the pin 44 and 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 4! may be unhooked from the hook 3| and the front and back saddles and the stirrup 4| may then be removed as a unit, thus freeing all of the top rolls.

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

The spring tension construction herein shown has the advantage that the spring 30, hook 3| and bracket 32 may be assembled and the spring 30 may be adjusted as to pressure, before these parts are inserted in the spinning frame. Accurate and uniform setting of all of the springs 30 in a spinning frame may thus be conveniently accomplished.

No claim is made herein to the pressure-releas- CTl ing connections between the top roll Saddles and the stirrup, per se, as these connections constitute the subject matter, in part, of my original application, Serial No. 236,253, of which this application is a division.

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 claim, but what I claim is:

In a drawing frame having a roller beam with a fiat horizontally extended upper portion, drawing rolls supported on said roller beam, and

saddles and stirrups for said drawing rolls, that V improvement in stirrup-tensioning means which comprises a fixed stand associated with each stirrup and detachably secured to and below said horizontally extended roller beam portion and disposed entirely below the plane of said horizontal portion, a compression spring seated in and below said stand and extending downward therefrom, a pull rod extending freely through said stand and spring and having its lower end engaged and pressed downwardly by said compression spring and having its upper end extending above said stand and beam and detachably connected to the lower end of the corresponding saddle stirrup, and means to limit downward movement of said pull rod relative to said stand, each stand, pull rod and spring constituting a complete tension device separately removable as a unit from said drawing frame,

GEORGE WEST.

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