US1940366A - Loom - Google Patents

Description

H. J. MURPHY Dec. 19, 1933.

LOOM

Filed July 13, 1932 4 Sheets-Sheet 1 IN V EN TOR. ,HJmr /y BY J Wm A TTORNEYS.

DEC. 19, M P Y LOOM Filed July 13, 1932 4 Sheets-Sheet 2 IN V EN TOR.'

Ji. JMurph A TTORNEYS.

LOOM

Filed July 13, 1932 4 Sheets-Sheet 3 IN VEN TOR.

flMurp/zy A TTORNEYS.

H. J. MURPHY Dec. 19, 1933.

LOOM

Filed July 13 1932 4 Sheets-Sheet 4 J9 INVENTOR.

ATTORNEYS.

Patented Dec. 19, 1933 r umrso STATES: PATENT OFFICE.

IJOOM' Henry James Murphy; Columbus, Ga., assignor to Bibb Manufacturing Company, Macon, Ga a corporation of Georgia Application July 13, 1932.. Serial No. 622,284

3 Claims. (Cl. 13924) employed to provide an. intermittent travel for Y the crinkle warp, .In former let-off mechanisms for the crinkle-warp much .trouble has been experienced inwregulating. the length of the waves of--.exoessin the crinkle-warp. It frequently happensthat the excess waves are too: long, and the resulting fabric has a coarse rough appearance; then again, the excess waves aretoo short: and thozcrinklezeifect appears to be lackingin patches entire-fabric; a

eThea'object of the present invention is to provide. a IQtr-Ofi mechanism for the. crinkle warp that canbe adjusted andoperated to provide excess waves inthe warn of a uniform length and :spaced at regular intervals so that. the crinkle.- efiect. of the resulting fabric willv be free from. blemishes. The novel let-off mechanism is described indetail hereinafter, pointed out in the. appended claims andillustrated by-the accompanying: drawings. 1 V

In; the accompanying drawings, in which similanareference characters designate correspondingparts, r

*Figure- 1 v is a side elevation of a loom with the novellef-off for. the, crinklewarp mounted thereon, only-so much of the-loom is shown as is necessary to illustrate the invention;

Figure 2. is an enlarged detail plan view of the let-oit andtheygear connection with the sand-roll. 1 V a I Y 1 Figure 3 is a side elevation of the lef-off and the operative connection with the lay sword, partsbeing broken away.

Figure, 4 is a front elevation of the let-off. Figure 5 is; a detail view, showing the pawls for. actuating the ratchet wheels, one of the pawls' having a, trip arm projecting from its side. i i

Figuresfi and 7-- are detail views of the brake elements-for steadying the turning movement of the primary ratchetwheel. I 1 Figure 8' is-.a side elevation of the primary ratchet -wheel withv the dogs for tripping the pawl shown in Figure 5 having the tripping arm.

Referring to the drawings in detail, l desig; hates a part of the. frame of a loom on which are mounted the several operativeparts. Extending transversely of the lower rear Tpar'tiof the frame is the beam 2 carrying the ground warp threads 3, which lead from the ,beamover the idle roll 3a, through the detectors 4, the harness 5 and the reed 6, to. the takeup roll '7 and the cloth beam 8. Mounted in theupper part of the frame, to extend across the. same, is the beam 9 carrying the crinkle warpthreads 10. The latter lead from the beam 9 partly aroundthe idle roll 11 and almost entirely around the sand-roll 12, these rolls being. suitably journaled in the frame. From the sand roll the threads 10 lead through the detectors 4, theharness 5. and the reed 6, to thetake-up roll 7 and the cloth beam 8. The foregoing parts and their operation are well knowninv the wear;- ing art. During the, weaving the warp threads 7 from both of the beams 2-and 9 are drawn forward by the action of the take-uprollfl and the cloth beam 8 by the means ordinarilyemployed. A let-off, mechanism is providednto. regulate the feed of the warp 10 from the beam 9 .to produce the crinkle effect in the weave. This mechanism operates to feed forward from the beam 9 the crinkle warp in excess of the ground warp 3 drawn from the beam 2, the excess ofcrinkle warp being fed forward intermittently. and uniformly to meet the requirements for the crinkle weave. This is effected by let-01f mechanism actuated by the lay of the loom to rotate intermittently the sand-roll 12 to forward the excess of crinkle warp 10 in successive waves.

The let-off mechanism actuated .by the lay is mounted on the bracket 13 securedtto .the side frame 1.. Secured at one end in this bracket is the stub-shaft 14, on the outer end of which is journaled the primary ratchet wheel 15 and on the inner end. of the stubs shaft is journaled the secondary ratchet l6. Journaled on the stubshaft between the two ratchet wheels is the brake-hub 17 (Fig. 7) integral with the sleeve 13. Theratchet wheel 15 isclamped onthe sleeve 18 between the hub and the nut 19 turned onto the outer end of the sleeve. The hub andv sleeve form a bearing for the ratchet wheel to turn on the stub-shaft. By' this means, when, the ratchet wheel is turned the hub turnswith it.

Over-running of the ratchet wheel 15 is prevented by the friction strap 20 (Fig. 6) encircling the hub 17. Threaded through the ends of the strap is the vertical lowerpart-of the angular rod 21, slidably mounted at its horizontal upper part in the block 22 fixed on the horizontal arm 23 secured at its inner end in the bracket 13. On the horizontal upper part of the rod 21 is the coiled spring 24 compressed between the block 22 and the angle in the rod. This spring tends to thrust the rod away from the block, thereby exerting a pull on the ends of the strap 20 to tighten the latter on the hub 17 to brake the rotation of the ratchet wheel 15. The strap is lined with leather to increase the frictional engagement of the strap with the hub. By means of the threaded engagement of the rod with the ends of the strap, the grip of the latter on the hub can be adjusted to regulate the braking action on the ratchet wheel 15 to prevent over-running of the latter. Also, the thrust of the rod on the strap can be regulated by varying the compression of the spring 24 on the rod. The purpose of the braking mechanism is to steady the rotation of the wheel 15 as it is intermittently rotated.

Mechanism is provided for'intermittently rotating the ratchet wheels 15 and 16. On the outer end of the stub-shaft 14 is pivoted the lever 25 at an intermediate part, held in place thereon by the cotter-pin 26 inserted in the extremity of the shaft. One end of the lever is connected by the link 2'? with an end of the bell-crank 28 fulcrumed at 29 to the frame of the loom. The other end of the bell-crank is connected by the link 30 with the lay sword 31. The oscillation of the lay sword during the operation of the loom is transmitted by the intervening mechanism to the lever 25 to oscillate the latter on the stub-shaft through a comparatively short arc. Projecting horizontally from the other end of the lever 25 is the horizontal arm 32 carrying the pawls 33 and 34 respectively engaging the ratchet wheels 15 and 16. The pawls are normally pressed into engagement with, the wheels by the springs 35. As the lever 25 is oscillated the upward movement of the pawls turn the engagedwheels one notch.

During the operation of the loom, the ratchet wheel 15 is constantly turned one notch at a time, but means are provided whereby the throw of the ratchet wheel 16 may be varied. Projecting from the inner edge of the pawl 34 is thetrip-arm 36 to be engaged by the stops or dogs 37 detachably mounted on the inner face of the ratchet wheel 15. Ordinarily, four of these stops are employed, quadrantly spaced around the ratchet wheel as shown in Figure 8.

Additional stops may be employed as indicated by dotted lines. Each of these stops comprises a shank adjustably attached to the inner face of the ratchet wheel by the set-screw 38. The outer end of the stop is bent over to form a trip As the two ratchet wheels 15 and 16 are rotated by the oscillation of their respective pawls 33 and 34, at intervals one of the stops 3'7 is turned so that its trip 39 wipes the trip-arm 36 and the pawl 34 is lifted from the ratchet wheel 16. When the pawl 34 is lifted, the ratchet of stops 37. The nature of the material being treated and of the product require different adjustments.

The ratchet wheel 16 is compounded with the pinion 40 journaled on the inner end of the stub-shaft 14, the pinion being included in the train of gears 4043, the gear 43 being fixed on the shaft of the sand-roll 12. The resistance of the sand-roll, transmitted through the gears 4043, prevents over-running of the ratchet wheel. Back-lash of the ratchet wheels 15 and 16 is prevented by the pawls 44 and 45 respectively engaging the wheels. These pawls are carried by therod 23 secured to the bracket 13 and extending over the ratchet wheels.

In the operation of the loom the warps 3 and 10 are drawn forward in the usual manner by the take-up roll '7 and the cloth beam 8. As the lay sword 31 oscillates, through the intervening mechanism the lever 25 is rocked on the shaft 14 and an intermittent rotation is imparted to the ratchet wheels 15 and 16. The intermittent rotation of the ratchet wheel 16, through the gear-train 40 -43, turns the sandroll 12 to feed forward the crinkle warp 10 from the beam 9. The drive of the sand-roll is such as to feed forward the crinkle warp in excess of the feed of the ground-warp 2. At regular intervals the pawl 34 is lifted from the ratchet wheel 16 and the drive of the sand-roll ceases at corresponding intervals. This results in a wave-like forward movement of the crinkle warp and Woven into the fabric, the required crinkle effect is obtained. By varying the number of the dogs 3'7, the frequency of the stops in the drive of the sand-roll can be regulated to vary the lengths of the excess waves in the crinkle warp, so that fabrics of different patterns can be woven.

What I claim is:-

1. In a loom for weaving crinkle cloth having a beam for the crinkle warp, a harness,- a lay and a sand-roll around which pass the threads from the crinkle warp beam to the harness, in combination with a let-off for intermittently rotating the sand-roll to feed the crinkle warp from the beam to the harness and lay, said letoff comprising primary and secondary ratchet wheels oppositely mounted on a stub-shaft, a

pivoted lever carrying pawls respectively engaging the ratchet wheels, mechanism actuated by the lay for rocking the lever to operate the pawls to rotate simultaneously the ratchet wheels, a trip mechanism actuated by the primary wheel for lifting at' intervals the pawl of the secondary wheel so that the rotation of the secondary wheel is stopped at regular intervals during the rotation of the primary wheel, and a gear-train for transmitting the intermittent drive of the secondary wheel 'to the sand-roll to effect intermittent forward feed of the crinkle warp from the beamto the harness.

2. In a loom for weaving crinkle cloth having a beam for the crinkle warp, a harness, a lay and a sand-roll around which pass the threads I;

from the crinkle warp beam to the harness, in combination with a let-off for intermittently rotating the sand-roll to feed the crinkle warp from the beam to the harness and lay, said le off comprising primary and secondary ratchet 51 wheels oppositely mounted on a stub-shaft, a lever pivoted on the stub-shaft carrying pawls respectively engaging the ratchet wheels, mechanism actuated by the lay for rocking the lever to operate the pawls to rotate simultaneously 1.

the ratchet wheels, a series of adjustable dogs spaced apart on the primary ratchet wheel operating successively as the primary wheel is turned to lift the pawl of the secondary ratchet wheel so that the rotation of the secondary wheel is stopped at intervals during the rotation of the primary wheel, and a gear-train for transmitting the intermittent drive of the secondary wheel to the sand-roll to effect intermittent forward feed of the crinkle warp from the beam to the harness.

3. In a loom for weaving crinkle cloth having a beam for the crinkle warp, a harness, a lay and a sand-roll around which pass the threads from the crinkle warp beam to the harness, in combination with a let-off for intermittently rotating the sand-roll to feed the crinkle warp from the beam to the harness and lay, said letoff comprising primary and secondary ratchet the rotation of the secondary wheel is stopped at regular intervals during the rotation of the primary wheel, and a gear-train for transmitting the intermittent drive of the secondary wheel to the sand-roll to eflect intermittent forward feed of the crinkle warp from the beam to the harness.

HENRY JAMES MURPHY.

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