US2240646A - Whip roll counterbalance - Google Patents

Description

y F. J. HAGEN 2,240;s4s

WHIP ROLL COUNTERBALANCE I Filed April 7, 1939 2 Sheets-Sheet i Fred :ZJfagem,

3% WQQ F. J. I-IIAGEN 2,240,646

.WHIP ROLL COUNTERBALANCE Filed April 7 1939 2 Sheets-Sheet 2 I'r ed (f fagen,

Patented May 6, 1941 'UNiTED 'TAT S PATET GEFIQE WHIP ROLL CQUNTERBALANCE Fred J. Hagen, Crichton, Ala.

Application April 7, 1939, Serial No. 266,640

2 Claims.

This invention relates to let-off devices for looms, particularly whip rolls. Specifically, the invention resides in providing a counterbalance for a whip r011.

In developing the invention, it was found that,

' as partially to overcome the vibrator rod spring.

The excessive tension on the warp yarns resulted in a narrowing of the fabric,'and decrease in the diameter of the warp yarn. It is therefore an object of the invention to decrease the amount of extra tension necessary to compress the vibrator rod spring. V

In providing a counterbalance for a whip roll, it is also an object to allow the use of a correspondingly weaker vibrator rod spring, and thus to decrease wear on the harness eyes, jumping of beams when the warp is low, and wear on the machine parts.

It is also intended toprovide a counterbalance which may be readily attached either to right or left-hand looms of the standard types, and which may be easily tested and adjusted to suit different warp yarns.

These and other objectives, such as the provision of a counterbalance which is low in original cost, simple in operation, and easy to maintain, will be apparent from the following specification and drawings, in which:

Fig. 1 is a side elevation of the device;

Fig. 2 is a plan view;

Fig. 3 is a vertical section along the line 33 of Fig. 2;

Fig. 4 is a vertical section along the line 44 of Fig. 1, and 4 Fig. 5 is a side elevation of the device as installed on a loom.

Referring particularly to Figs. 1 to 4, inclusive, the weight arm 2, which is laterally oifset as indicated at 4, is provided with a hub 6 having sets 8 and ID of teeth. The free end l2 of arm 2 is notched on its upper and lower sides l4 and I6.

Numeral I'I indicates the counterweight, which is adjustably mounted on the weight arm 2 by means of the pin l8 which extends through the counterweight and through one of the slots [4, as best shown in Figs. 3 and 4, and by the set screws 22 and 24 which extend through the threaded holes 25 in one side of the counter- Weight 11.

Because of the offset portion 8 of the weight arm two sets 8 and Id of teeth on the hub 6, and the sets l4 and it of notches on the upper and lower sides of the free end I 2 of weight arm 2, the counterbalance may be mounted on either the right or left-hand side of a loom without interfering with adjacent loom parts. When mounted, the counterweight Il may be adjusted by loosening set screws 22 and 24, and moving the weight along the free end l2 of the arm 2. The pin l8 engages in the notches i4 and holds the weight temporarily until the set screws 22 and 24 are again tightened to engage arm 2 as shown at 28.

Fig. 5 shows the device mounted for operation.

In one end of the loom frame 39, the warp beam 32 "holds warp threads 34 which are passed over the whip roll 3%. The whip roll 33 is supported at each end in the usual manner by a pair of arms 38 secured to the shaft 3&3 by collars 49. As shown in Fig. 5, the shaft is rotatably supported by the loom frame 36. On one end of the shaft 39 is mounted the whip roll lever 42; which is secured tightly against the collars 40 by the nut 4|, and has the whip roll lever plug 44 pivoted at its lower end, through which the vibrator rod 46 passes. Preventer spring collar 48 holds one end of the vibrator rod spring 49, the other end being'abutted by the member 58. The vibrator rod 46 passes through the member 58, and, as shown at 5|, engages thecontrol lever 52 operatively connected to the pallet lever 54 and pallet 56.

The loom may be either of the type in which the whip-r011 is positively moved by a let-off motion transmitted upwardly through the vibrator rod and wherein a retroactive control movement is transmitted back through the vibrator rod spring to control the amount of letoff for the warp beam in accordance with the tension of the warp on the whip roll, or it may be of the type in which the whip roll is moved only by the warp.

The hub 6 of the Weight arm 2 is attached by removing unit 4|, removing the whip roll lever 42, and by inserting the hub over shaft 39 between the lever 42 and collar 48. The teeth 8 bear against the inner face of the upper end of the lever 42 and against the collar 40 and thus prevent relative rotation between the weight arm 2 and. the lever 42.

When installing the counterbalance on looms previously in use,- the old vibrator rod spring should be replaced by one substantially weaker.

As may be seen in Fig. 5, the counterbalance exerts a force in opposition, to the tension of the yarn against the whip roll 36. The weight of the whip roll itself, plus the Weight of the supporting parts, and the whip roll lever also exert a force which must be overcome by the spring 49. Since, because of the counterbalance, the tendency of these parts to swing downwardly against the spring 49 is less, the vibrator rod spring need not be of as great initial strength as without the counterbalance. In the weaker spring, the ratio of increase in necessary force to move it between maximum extended and maximum compressed conditions is not as great as with the former, initially stronger spring. In result, there is relatively little difference in the tension of the warp yarn between its normal condition and the let-off periods.

In actual operation, use of the counterbalance hasresulted in an increase of approximately 3000 more picks per eight hour day than before with the same loom. The cloth is a full one quarter of an inch wider, and the warp yarn may be made from single creel roving where double creel roving was previously required. By approaching uniform tension at all times, incorrect setting of the let-off motion is compensated for.

While I have described herein some embodi ments of my invention, I wish it to be understood that I do not intend to limit myself thereby exicept within the scope of the appended claims.

I claim:

1. In a whip roll mechanism for a loom having a whip'roll supported adjacent the outer ends of a pair of arms connected to a shaft at the inner ends of said arms, said shaft being supported on the frame of said loom, a lever on said shaft, and a spring operatively engaged against the free end of said lever for resiliently holding said whip roll against the warp yarn of said loom and adapted to be compressed during the warp yarn let-oil motion of said loom; a counterbalance, said counterbalance being adapted and arranged to force said whip roll against said Warp yarn in supplement to said spring, and comprising a weight arm, means on one end of said weight arm for securing the same to said shaft, a counterweight adjustably secured to the other end of said weight arm, and means for adjusting the position of said counterweight along said weight arm, said weight arm being laterally offset intermediate its length, the first-mentioned means comprising a hub, and teeth on the faces of said hub adjacent the opening thereof, the secondmentioned means comprising a series of teeth along the upper and lower edges of said rod whereby said counterbalance may be used for either right or left-hand looms, said counterweight having an opening through which said weight arm is slidable, and a pin across said opening whereby said counterweight may temporarily be held on said weight arm during adjustment, and set screws threadedly engaged with said counterweight and engageable against said weight arm.

2. In a whip roll mechanism for a loom having a whip roll supported adjacent the outer ends of a pair of arms connected to a shaft at the inner ends of said arms, said shaft being supported on the frame of said loom, a lever on said shaft, and a spring operatively engaged against the free end of said lever for resiliently holding said whip roll against the warp yarn in said loom and adapted to be compressed during the warp yarn let-ofi motion of said loom; a counterbalance, said counterbalance being adapted and arranged to force said Whip roll against said warp yarn in supplement to said spring, and comprising a weight arm, means on one end of said Weight arm for securing the same to said shaft, a counterweight adjustably secured to the other end of said weight arm, and means for adjusting the position of said counterweight along said arm, said weight arm being laterally offset intermediate its length, the first-mentioned means comprising a hub, and teeth on the faces of said hub adjacent the opening thereof whereby said counterbalance may be used for either right or left-hand looms.

FRED J. I-IAGEN.

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