US1672204A - Take-up mechanism for looms - Google Patents

Description

June-5, 1928.

C. H. DRAPER TAKE-UP MECHANISM FOR LO0M S Filed Dec. 18, 1925 2 Sheets-Sheet 1 June 5, 1928.

- c. H. DRAPER TAKE-UP MECHANISM FOR LOOMS Filed Dec. 18, 1925 2 Sheets-Sheet W M w uniform appearance than in a high-roll take- Patented June 5, 1928.

PATENT oFi-"icr UNITED-STATES CLARE H. DRAPER, HOPEDALE, MASSACHUSETTS, ASSIGNOR,- BY MESNE ASSIGN- MENTS, TO nnarnn'conronurron, or HOPEDALE, MASSACHUSETTSLA TION or MAINE.

CORPORA- TAKE-UP MECHANISM FOR LOOMS.

Application filed December 18, 1925. Serial 110. 76,205.

The present invention relates to an improvement in. take-up mechanism for looms.

The take-up mechanism of a loom is 0rdi narily actuated as in the Northrop Patent 1%.. 1,4791%, by mechanism which positively rotates the draw-roll, as a result of which the tension exerted by the draw-roll on the cloth being woven. is a hard, unyielding tension.- It has been claimed that the cloth itself in a low-roll take-up offers a yieldingp-ull on the cloth at the fell which eon'ipensates for variations in weft sizes,-

with the result that the cloth exhibits a more up, wherein the length of warp between the take-up roll and the fell is less. But in both cases the unyielding character of the mechanism is an objection which it is the object of the present invention to overcome by providing the mechanism: with devices for exerting a yielding tension upon the cloth while it is being woven. While the invention is susceptible of embodiment in a loom provided either with ahigh-roll take-up or with a low roll take-up, it obviously is of larger importance in a high-roll take-up loom because of the shorter length of cloth in that loom between the take-up roll and the fell. The invention consists in the improvement hereinafter described and particularly defined in the claims.

In the accompanying drawings illustrate ing the preferred form of the invention, Fig. 1 is a sectional elevation illustrating the take-up mechanism of a high-roll take-up loom embodying the present invention; and Figs. 2 and 3 illustrate details of construction hereinafter referred to.

The illustrated embodiment of the invention is described as follows :-The entire mechanism illustrated in this drawing with In order to with the hub 196,secured to the sleeve or hollow shaft 197 by means of the set screw 198, Upon this hollow shaft 197 is integrally formed the pinion. 18, which meshes with the intermediate gear 17, which meshes in turn with the gear 16, rigidly securedto the pinion 15, which meshes with the gear 14 connected with the draw'roll 13.

The arcuate rod 194 is embraced by a spring 199, which bears at one end, against the boss l92'on the change gear 191, and at the other end on the collar 200, secured at the free end ofrth'e arcuate rod 194 by means of a cotter pin 201, which enters one of a series of holes 202 in the free end of the areaate rod. By placing the cotter pin in one or the other of the holes 202, the tension of the spring 199 may be varied.

The change gear 191' is driven by means of v the won-n20, as in said patent. The change gear is normally driven in the direction of the mo 203. Thisrotates the change gear inthe direction tending to exert a pressure upon the spring 199, 'which, through the arcuate rod 194, is transmitted to the arm 195 of the gear train for the draw-roll. Thus it will be seen that the pull or tension exerted upon the cloth 10 by thedraw-roll 13 is a yielding, elastic tension, and not a rigid, positive tension as is exerted upon the cloth by the mechanism illustrated in said patent.

It hasbeen found in the operation of a loom equipped with the present invention that the elastic pull exerted upon the fabric by this take-up mechanism secures a uniform interweft space betweenthe weft threads of the cloth whereby the loom is enabled to produce a cloth with a weft'of varying dimensions and .of much more uniform appearance than that which is capable of being produced by a loom equipped with the mechanism" of the said patent. It is apparent that a slenderer weft would naturally be beaten up into the fell a greater distance than the larger Weft, and where the tension exerted upon the cloth bythe draw-roll is an elastic tension, the pressure with whichthe wefts are beaten into the fell are made more uniform than in a case where the position of the fell was ad- I the Wefts, and a superior appearance of cloth With no superior qualities of Weft.

Broadly stated it may be said that the invention contemplates a take-up mechanism for looms comprising a device adapted to exert a yielding tension upon the clothbeing woven and permitting backward motion of the take-up to give up cloth.

Having thus described the invention, what is claimed is: i

1'. In a take-up mechanism for looms, the combination of a cloth take-up roll over which the cloth passes and by which the cloth is taken up as woven, a train of gears between the take up roll and an operating shaft of the loom for rotating the take-up roll to take up the cloth as it is woven, including a'yielding driving connection between two of the gears of the train and constructed to urge the roll forward and to yield backward and also constructed to limit the relative rotation of the two gears to a fraction of one complete revolution to thereby limit the yielding movement of'said roll.

2. In a take-up mechanism for looms, the combination of a cloth take-up roll over which the cloth passes and by which the cloth is taken up as woven, a train of gears between the take-up roll and an operating shaft of the loom for rotating the take-up roll to take up the cloth as it is woven, including a yielding driving connection between two of the gears of the train and constructed to urge the roll forward and to yield backward, and stops positioned to cooperate with the yielding means to limit the relative rotation of the two gears to a fraction of one complete revolution to thereby limit the take-up and give back of the cloth being woven.

3. In a take-up mechanism for looms, the a combination of a cloth take-up roll over which the cloth passes and by which the cloth is taken up as woven, a train of gears between the take-up roll and an operating shaft of the loom for rotating the take-up roll to take ups-the cloth as it is woven, including a pair of gears mounted to rotate about a common axis, a pro ection rigidlyv secured to one of said gears, and a spring connection between the pro ect1on and said other gear and'arranged to urge the roll forward and to yield backward through a limited angle to thereby limit the yielding takeup and give back of the cloth being Woven.

4. In a take up mechanism for looms,the combination of a cloth take-up roll over which the cloth passes and by which the cloth is taken up as woven, a train of gears between the take-uproll and an operating shaft of the loom for rotating the take-up roll to take up the cloth as it is Woven, including a pair of gears mounted to rotate about a common axis, a yielding connection CLARE H. DRAPER.

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