US1310398A - Atibeut lavigne - Google Patents

Description

A. LAVIGNE. LET-OFF MECHANISM FOR LOOMS. /,APPLICATION FILED AUG.2I. 1916.

1,310,398. I Patented July 15, 1919.

ALBERT IAVIGNE, OF BRUNSWICK, MAINE, ASSIGNOB. TO THE STAFFORD COMPANY, OF

READVILLE, BOSTQN, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

. &

LET-OFF MECHANISM FOR LOOMS.

Specification of Letters Patent.

Application filed August 21, 1916. -Serial No. 115,943.

. To all whom it may concern:

Be it known that I, ALBERT LAVIGNE, a citizen of the United States, residin at Brunswick, in the county. of Cumberland, State of Maine, have invented a certain new and useful Improvement in Let-Off Mechanisms for Looms, of which the following is a specification, reference being had therein to the accompanying drawing The invention is an improvement in letofi' mechanisms of what is termed the compensating class. Such mechanisms have a follower or presser which is arranged to bear against the periphery of the wound supply of warp-threads upon the warpbeam of a loom, etc. This part forms an element of provisions for regulating the rate of delivery of the warp-threads from said warpbeam so as to compensate for the progressive decrease in diameter of the said supply as unwinding proceeds. Sometimes in practice in the weaving of certain classes of goods it is preferred to dispense with the compensating action and to operate with lettingofi' action of ordinary character. Moreover, under some conditions the said follower is liable to interfere with certain of the manipulations or operations which are necessary to be performed by the weaver or loomfixer; for one thing, with the introduction of a filled warp-beam into place in the loom. It also is liable' to swing, at the time of the removal of a warp-beam from the loom, so as to strike upon some adjacent part of the loom, as for instance the back glrth, and become broken in consequence.

The general object of the invention is to provide means for enabling the compensatlng action to be superseded by ordinary letting-off action in the working of a loom, whenever required; in addition adapted to enable such interference to be avoided, and for preventing the follower or presser from falling.

The invention consists, essentially in a follower-lock for locking the follower of a compensating let-off mechanism in stationary position whenever it isdesired to supersede the compensating actlon or to effect a removal or replacement of a warp beam. The invention admits of being embodied and applied in various ways The drawings show in side elevation an embodiment of the invention applied in connection with positive letoif devices of a well-known type,

the latter having combined therewith compensating devices of a character at present 1n use.

Figure 1 of the drawings is a side elevatlon of part of a loom, with the said embodiment applied thereto.

Fig. 2 shows a second embodiment.

In the drawings, which show only one of the forms of compensating let-off mechanisms to which the invention is applicable, the follower or presser 1 is shown retracted and locked in a stationary position out of contact with the periphery of the wound mass 2 of warp-threads upon the warpbeam 3. Consequently the compensating action has been superseded and in this condition the let-off mechanism will act as an ordinary let-off mechanism under the con trol of the tension of the warp, acting through the whip-roll 14 and thewarp-beam actuating devices and gearing controlled thereby. The warp-beam is in working position, with its journals 4 occupying bearings 5 in connection with the loomframe, and with its gear 6 in mesh with the beam-operating gearing 7 of the let-off mechanism. As usual the follower or presser is mounted with capacity to swing toward and from the axis of the yarn-beam, and is adapted to be controlled as to its position by the diameter of the wound mass of warp-threads upon the warpbeam. As usual, also, in operation it approaches the said axis in proportion as the said diameter rows less by reason of the unwinding of t e warp-threads. As herein shown, it is fixed upon a rockshaft 8 supported in convenient hearings in connection with the loom. The rockshaft 8 has a short, arm 9 to which is joined one end of a link or connecting-rod 10, the otherend of which is joined to an arm 11 in connection with the abutment 12 for the spring 13 by which the whip-roll 14 is controlled. The arm 11 and spring-abutment 12 are supported at 15 with capacity to rock or swing. The spring '13 surrounds a rod 16 having one end thereof joined to the whip-roll arm 14", and is confined under more or less compression between the said abutment and the said arm. The said spring operates, as heretofore, to back up the whip-roll and also to keep the presser or follower close against the periphery of the mass of warp-threads wound upon the warp-beam. The rod 16 passes through a hole in the spring-abutment 12 and has its other end joined to the controlling-lever 17 the loom-frame. and dog ordetent preferably are so related detent b adapted to engage with said projection or tooth. The said projection or tooth projects from the hub of the springabutment, and the holding dog or detent is mounted pivotally at b invconnection with The projection or tooth that ordinarily the do not engage with each other during t e ordinary worklng of the parts, and consequently do not interfere with the movement of the spring-abutment and presser or follower which is necessary to take place in order that the presser or follower may remain in contact with the surface of the wound mass of warp-threads upon the warp beam as such mass becomes smaller in diameter. Or, the dog or detent may be swung back into aninoperative position, and remain in such position, out of the way, until it is desired to act. It is intended that, as shown, the dog or detent shall i be caused to engage with the projection or tooth when the presser orfollower'has been swung by the weaver or loom-fixer away from the position of the warp-beam, and,

. through thusengaging', lockthe presser or follower in a retractgdinoperative position, as in Fig. 1, inwhich it W111 not-be in the .way of a filled warp-beam which is being placed in position in the loom. Also, so that it will not'fall when the warp-beam previou.sly in the loom is removed, so as to landupon the backgirth 19 with resulting dog or .detent from the projection or'tooth, the presser or follower will be freed and the spring 13 will 'act through the spring-- abutment and connections to the presser or follower to move the latter into working engagement with the surface of the wound supply of warp-threads-upon the inserted warp-beam.

In the case of the embodiment shown in Fig. 2, the dog or detent b is connected piv-' ota'lly at b wlth the arm 11, and a stop-pin a is fixed upon the loom-frame. The parts are so related that when the follower or presser is swung back into its. position in Fig. 1, the shoulder or engaging portion of the dog or detentb will catch against the stop-pina" so as to hold the follower or presser in its retracted position. Ordinarily, however, the dog or detent. will rest upon andplay over the saidstop-pin without engaging therewith, and without interfering with the desired action of the .follow'er'or' changing diameter of the yarn-mass and itself controllingthe rate of unwinding, of a follower-lock for locking lower in a stationary position;

'2. In a let-off mechanism for looms, the combination with a presser or follower making contact with the surface of the wound the said folsupply of war -threads upon the ,wa

beam, asprin -a utment connected-with said presser or 0 lower, and the whip-roll actuating spring acting throu hsaid abutment to press the presser or fol ower toward the axis of the warp-beam, of a dogor detent adapted to cooperate with said spring-abuts ment to detain the presser or follower in a stationary position. v V v In testlmony whereof I aflix-my signature in presence of two witnesses. danger of1breakage. Upon 'dlsengag ng the g *AL nRT' AviGNE." Witnesses': x I

- RUSSEIL W. EATON,

- Ron'nur K. EATON,

Images