US953664A - Let-off mechanism for looms. - Google Patents

Description

E. R. HOLMES 0"; B.. E. VALENTINE.

LET-OFI' MBCHANISM FOR LOOMS.

ad APPLIUTION FILED HAY 13, 1909. I L @gls Pameme Ear. 29, 1910.

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B.. HOLMES R. E. VALENTINE.

LET-0F? MBCHANISM FOR Looms.

APPLICATION FILED MAY 13, 1909.

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ANDREW E. GRAHAM co. Fume-mn. QAFHEHS. wnsmnmfmA n C E. R, HOLMES @L R. E. VALENTNB LET-OFF MEGHANISM E OR LOOMS.

APPLICATION FILED MAY 13, 1909.

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ANDREW s. GRAHAM ceA Hmm-umoammsns. wAslmlmorJ, n.4:

STES PATENT ELBRIDGE R. HGLMES AND RALPH E. VALENTINE, OF WORCESTER, MASSACHUSETTS,

ASSIGNORS T CROMFTON 8s KNOWLES LOOM TOR-KS, A CORPORATICN OF MASSA.-

CHUSETTS.

LET-OFF MECHANISll/ FOR LOOlVIS.

esseee.,

Specicaton of Letters Patent.

atented Mar. 29, ifl,

To all whom it may concern:

Be it known that we, Emnmen R. HOLMES and RALPH E. VALENTINE, citizens of the United States, residing at ll'lorcester, in the county of lVorcester and State of Massachusetts, have jointly invented certain new and useful lmprovements in Let-Off Mechanism for Looms, of which the following is a specification.

Our invention relates to let-off mechanism for looms, and particularly to narrow ware or ribbon looms for weaving elastic or rubber fabric, and the object of our invention is to provide a let-off mechanism for looms of the class referred to, by means of which the rubber warp is slackened for a certain number of picks, as required, to make the non-elastic portion of the fabric, and then stretched for a certain number of picks to make the elastic portion of the fabric.

Our invention consists in certain novel features of construction of our improvements as will be hereinafter fully described.

For .narrow ware looms for weaving fabric for Suspenders, etc., which require a non-elastic portion, and an elastic portion, we provide means connected with the let-off inecl'ianism, which means are preferably put into operation by a pattern surface, and are adapted to slacken the rubber warps in the non-elastic portion of the fabric, and then to stretch the rubber warps in the elastic portion.

lli/le have shown in the drawings a detached portion of a narrow-ware loom, and let-off mechanism, with our improvements applied thereto, sufficient to enable those skilled in the art to understand the construction and operation thereof.

Referring to the drawings t-Figure 1 is a rear Aview of one end of a narrow-ware loom, and our improvements applied thereto, looking .in the direction of arrow a, Fig. Q. Fig. 2 is a vertical transverse section, on line 2, 2, Fig. 1, looking in the direction of arrow o, same ligure; some parts which are shown in Fig. 1 are not shown in this figure. Fig. 3 is a detached view of operating levers which are not shown in Fig. 2; broken lines show the different positions of the levers. Fig. t shows some of the parts shown in Fig. 2, detached, looking in the direction of arrow o, same ligure. Fig. 5 is a side elevation of the rear of the loom, looking in the direction of arrow d, Fig. 4t, and, Fig. G is a plan View of some of the parts shown in Fig. at, looking in the direction of arrow c, same figure.

1n the accompanying drawings, 1 is a portion of the loom side or end frame, 2 is the upper girt, and 3 the lower girt, e are brackets or bearings for the warp beams or spools 5, on which, in this instance the rubber warps, not shown, are wound. Each of the warp beams or spools 5 is carried on a shaft. (3, and provided with a band brake wheel 7, of the usual construction. The rubber warps, not shown, are adapted to be drawn from the warp beams or spools 5 in the direction indicated by arrow no, in Fig. 2.

8 is the bottom shaft of the loom.

All of the above mentioned parts may be of any usual and well known construction.

le will now describe our improvements in let-olf mechanism for the rubber warps.

(ln the bottom shaft S is mounted in this instance a bevel gear 9, see Fig. Q., which meshes with and drives a bevel gear 1() fast on a shaft 11. The shaft 11 is loosely mounted in a bearing 1Q secured on a stand 1Q attached to the loom side 1, and in a bearing 1? secured to the loom side 1. The upper end of the shaft 11 has secured. thereon a bevel pinion 14s, see Fig. Q, which meshes with and continuously drives two bevel gears l5 and 16, see Fig. l, which are loosely mounted on a horizontally extending shaft 17, The shaft 17 is loosely mounted in a bearing 1S on the loom side 1, and in a bearing 19 on a bracket 19 secured to 'the upper cross girt- 2. T he shaft 17 is provided at its inner end with a worm portion 17. A worm threaded sleeve Q0 is loosely mounted on the worm portion 1T of the shaft 17, and has an extension Q0', to which is secured in this instance a stop lever '21, see Figs. 1, 4t, and 6, which extends upwardly toward the front of the loom, and has its upper end '21 offset and extending in an elongated slot QQ in a plate 22 secured to the cross girt 2.

The shaft 17, see Figs. 1, 4t, and 6, has splined thereon a clutch member' 23, which has an annular groove Q3 therein, into which extends the forked end of a clutch lever ist, having its hub 24C fast on a vertically extending shaft 25, which shaft is mounted in bearings 25 and 9.5 on the upper and lower cross girts 2 and 3, see Fig. 1. The clutch member 23 is adapted to be inoved into engagement with the teeth of either one of the bevel gears l5. and ,lot to cause the shaft l? to be rotated in one or the other direction.

rThe bevel gear l has rigidly connected therewith a pinion QG. which ineshes with and continuously driif'es a pinion 2T, loosely inounted on the horizontally extending shaft QS. The shaft Q8 has a bearing Q8 at one end. on the looin sido. see Fig. l. r there is also a bearing for the other end of the. shaft Q8 at the opposite end of the looni, not shown. rl`hel other bevel gear lo has rigidly connected thereto a pinion 29, which meshes with and continuously drives a pinion also loosely inounted on the .shaft 2S. Flach of the pinions 9T and 30 has a clutch portion QT and. 30 respectively. see Fig. l. which are zrdapted to be engaged by a clutch nieinber Si, which is splined on the shat't 2S. and has anY annular groove 3l therein to receive the forked end of a clutch lever 32. which has its hub 82. see Fig. secured upon the upright shaft Through the engagement of the clutch 3l with the clutch portion 2T on the pinion QT, or with the clutch portion 30f on the pinion llt), the horizontally extending shaft 25 is rotated in one or the other direction.

lzlounted on the horizontally extending shaft 2S are a series of driving pinions 3B. to inesh with a id drive the gears 334, which arc inounted on the shaft (i. There is a gear for each rubber warp beain 5, and each gear 34 has a pin 224 fast thereon7 to which s connected one end of a band S5. which es around the band wheel .7 connected with the warp beain or spool 5. and the o ier end of said band is connected to a ly coiled contraction springl 3o. which secured to the piu 34. see Fig. 2. the rotation of the gears I-S-t the )eanis 5 are rotated.

The vertically extending shaft Q5 has fast thereon, near upper end. the hub 23T of an arin or lever 23T, which extends toward thc front of the loom, see Fig. Q, and has its front end slotted at 3T, see Fig. to lo` receive a pin or stud 3S on a hori aontally extending square-shaped rod 3 l. `@ne end of the rod BS, at the left in Fig. l. is loosely held between two guide rolls 39; the other end of the rod 33 extends through the looni side, see Figs. 4. and 6. and has its upper edge guidingly held by a guide oll 40 inounted on a stand 4l on the leoni side, see To the end of the rod 38 is secured two plates .58, carrying a stud 3 m, on which is inounted a roll 42, which is adapted to travel on the upper edge of a cani-shaped portion 43 on the upturned end of a horizontally extending lever 43, see Figs. 4, and 5. The lever 43 has its hub 43 loosely inounted on the end of the shaft 17. fr helically coiled contraction spring 44 has t helica one end connected with an extension 43 on the lever 43, and its other end connected to a pin 45 on the looni side, see Figs. t and 5. The spring 44 acts to yieldingly hold the upwardly extending end of the lever 43 against the roll 40 on the square-shaped rod 3S. To the lever 43 is pivotally attached the upper end of a rod 46. The lower end of said rod 46 is pivotally attached to an arin 4T, which has its hub 47 loosely inounted on a stud 4S7 see Fig. 5. Extending out froin the hub 4T is an arin 47, to which is attached one end of a brake band 49, which passes around a peripherally grooved wheel 50, see Figs. l. and 5, which wheel is secured to the shaft 2S. The other end of the brake band 49 is attached to a second arin -l-T, and to said arni 47 is attached one end of a helically coiled contraction spring 5l. rl`he other end of said spring is attached to a pin on the looni side, not shown. The downward movement of the lever 43 causes the brake band 4S) on the brake wheel 50 to be loosened.

rllhe lower end of a rod which rod leads to a pattern inechanisin, not. shown7 is pivotally connected to the end of an arni :3J-3, which has its hub -53 secured on a rocking shaft 54, which is inounted in bearings *3 on stands 55 secured to the upper cross girt 2, see Fig. l. Also secured on the shaft 54 is the hub 5o of a lever 5o. rlhe upper enlarged end of the lever 5G has the inclined or cani-shaped portion or block 56", which is adapted to be inoved into the path of and to engage a roll 57 on a pin 5S on the square-shaped rod 3S. Then the lever Sti. having' the cani-shaped block 5G. is inoved froin one position to its other posi tion. shown by broken lines in Fig. the roll. 5T travels along the cani-shaped o1' inclined edge of the block 5G and inoves the rod 38 longitudinally in one or the other direetion.

On the square-shaped rod 23S are adjustably secured collars 5S) and 60, by set screws 5o and 30. respectively. The collars 59 and o() carry a pin 59 and GO, respectively7 which are adapted to extend into the path of and be engaged by the offset end 2l on the arni Ql secured to the worin sleeve 20, when said sleeve inoved in one direction or the other` by the rotation of the worin portion 1'4"/ on the shaft 1T.

Froni the above description in connection with the drawings, the operation of our iniproveinents will be readily understood by those skilled in the art. Then the looin is in operation, the rubber warps7 not shown, are drawn frein the warp beains or spools 5, in the direction indicated by arrow fc, Fig. 2, under the tension caused by the brake bands 35 passing around the brake wheel 7 attached to the gears 34. The gears 34 are in inesh with the pinions 83 on the shaft Q8,

and said gears, remaining stationary, are held by the friction on the. brake Wheel 50 on the shaft 28. rlhe pattern mechanism, not shown, indicates the slaclrening of the rubber uarps, to weave the non-elastic portion of the fabric, and through the connector rod 52, the arm 53 is moved, in this instance from the position shown by full lines to the position shoivn by broken lines in llig. 3. lhe lever 56 with the lain-shapcd portion 5G thereon, engages the roll 57 on the squareshaped rod 8S, to cause said rod to move longitudinally, and in this instance toward the l in Figs. land (3, and to the right in Fig. l. rlhe roll a2, which is carried on the plates 3S on the end of the squareshaped rod 3S, travels along' the inclined edge on the upturned end of the lever 43, until said roll Ll2 enters the notch 431 in said end. The lever is pressed downwardly, and through the rod Litt?, and arms it?, 4T, releases the friction on the brake band i9 on the brake Wheel 50 secured on the shaft 28to allow the tur ling of said shaft. Through the pin or stud 3S on the squareshaped rod 3S, the end of the lever is moved. to the left in lfig. G, and the vertically extending shaft Q5 is rocked, and through the movement of th the clutch member 3l is moved into engageH nient with the clutch portion 27 on the gear 2T, see l, to rotate the shaft 2S and the pinions 33 thereon, which are in mesh with the gears 3l, causing said gears 34 to revolve in the direction of arroiv m, Fig. 2. and through the band 85 on the wheel 7, to rotate the spools or beams 5, and let ott the rubber vxvafrps, or slaclen the warps, for Weaving the non-elastic portion of the fabric. At the same time, through the rotation of the vertically extending shaft Q5, the bevel gear 1G Will revolve the shaft l? and the worm 1T thereon, in a direction to cause the i arm 2l to move toward the left in TEig. l, until the end 2l engages the pin 60 on the rod 38, to move said rod back again to the left. in Fig. l, and bring the roll 4t2 into the central part of the depression in the upturned end of the lever 43, to allow the spring le to act to return said lever to its raised position, and apply the band et@ on the brake wheel on the shaft 2S, to stop the rotation of said shaft. rllhrough the movement of the square-shaped rod 38, the lever 37 is moved to roclr the vertically exclutcli lever thereon, l.

tending shaft 25, and to move the clutch members i3 and 31 back into their inoperative position, and stop the operation of the slackening mechanism. To stretch or tighten up the rubber i Tarps again for Weaving the elastic portion of the fabric, the next indication of the pattern surface, not shown, through the connector rod 52 and intermediate connections, ivill move the lever 5G, from the position shown by broken lines to the position shown by full lines in Fig. 8, the square-shaped rod 3S is moved to its opposite position, and to the right in Fig. 4C, and the friction on the brake wheel 50 is again released, through the roll on the rod 38 entering into the notch 43D in the lever 43. The clutch members 23 and 3l are moved in the opposite direction to that above dcscribed, to cause the gears 233 to be rotated in the opposite direction, and turn the gears Slalso in the opposite direction, and through the band 35 on the Wheel 7 to retard, or rotate in an opposite direction the Warp beams or spools 5, to stretch or tighten up the rubber ivarps, until the sliding arm 2l on the worin portion 17 has been moved to its right position, as shown in Fig. l, to engage the pin 59, and move the rod 38 to the right, to move the clutch members and stop the operation of the let-blt mechanism.

lt will be understood that the details of construction of our improvements .may be varied if desired.

Having thus described our invention, what We claim as new and desire to secure by Letters Patent is l. ln a let-oil mechanism for looms, a ivarp beam or spool having a friction mechanism, and means, under the control of pattern mechanism, for automatically rotating said Warp beam or spool in either direction, to tighten, or slacken the Warp.

Q. ln a let-off mechanism for looms, a ivarp beam or spool having friction mechanism, and positive means, under the control of pattern mechanism, said means including gearing and clutch mechanism, for automatically rotating the Warp beam or spool .in either direct-ion to tighten, or sla-cken the Warp.

ELBRIDGE R. HOLMES. RALPH E. VALENTINE. Witnesses JOHN C. DEWEY, MINNA HAAs.

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