US2096593A

US2096593A - Let-off mechanism

Info

Publication number: US2096593A
Application number: US115743A
Authority: US
Inventors: Leonard M Rogers
Original assignee: Draper Corp
Current assignee: Draper Corp
Priority date: 1936-12-14
Filing date: 1936-12-14
Publication date: 1937-10-19
Anticipated expiration: 1954-10-19

Description

LET-OFF MEGHANISM Filed DeO. 14, 1936 ln lL l Il.

BY a all l?" e v g AT`TORNEY.

Patented ct. 19, 1937 UNITED STATES PATENT OFFICE 2,096,593 LET-OFF MECHANISM ration of Maine Applicationpeemleria., 1936, serial No. ,115,743

5 Claims.

'Ihe present invention pertains to let-:off mechanisms for looms, and has more particular reference to the supporting means for supporting the warp beam in proper relation to the let-off shaft of such mechanisms.

In mechanisms of the type to which my invention pertains, a warp beam is rotatably mounted in warp beam bearings and a let-off shaft is supported by a loom side and geared to the warp beam for controlling the rate of rotation of the latter. Looms are commonly constructed with identical loom sides and let-off shafts but with warp beams of various different diameters. It is also common practice for mills having looms with warp beams of a given diameter to change the looms to accommodate warp beams of a different diameter. The construction of most looms is such that a warp beam of a relatively large diameter is positioned farther rearwardly in the loom than is a warp beam of a smaller diameter.

Prior to the present invention, such looms, as commonly constructed, included warp beam bearings xed to the loom sides and adapted to support a warp beam in only one predetermined pcsition. This prior construction requires that the manufacturer provide a number of different designs of warp beam bearings, and also that a mill purchase new bearings whenever larger or smaller warp beams are to be installed. It has been proposed to obviate these disadvantages by constructing the warp beam bearings with a plurality of j ournal-receiving pockets for supporting a warp beam in any of a plurality of positions.v

Another prior proposal was to formthe warp'` beam bearing on the upper endof a bracket which was adjustable up and down and forwardly and rearwardly on a stand projecting rearwardly from the loom side. These prior proposed con-1 structions were too expensive, and were otherwise impractical, and they have not been used com mercially.

It is a principal object of the present invention to provide, in a loom having a warp beam and let-o shaft geared to the warp beam as aforesaid, a loom side having an arcuate portion the center of which coincides with the axis of the letoff shaft, and a warp beam bearing supported on the arcuate portion and adjustable along the same, whereby the warp beam bearing may be adjusted about the axis of the let-off to proper position to accommodate any of the usual sizes of warp beam.

The foregoing and other objects of the invention are accomplished in the constructionl illustrated o-n the accompanying drawing, of which:

Fig. lis a view in side elevation of a portion of a loom having the preferred embodiment of my invention applied thereto;

Fig. 2 is a rear view of a portion of the warp beam bearing and loom side shown on Fig. 1; and

Fig. 3 is a plan view of the same.

The loom shown on the drawing includes loom sides, such as loom side I, which may be of any conventional construction except that they are provided with an arcuate portion as hereinafter described in detail. A conventional warp beam 2 has journals 3 by which it is rotatably supported at the rear of the loom. The warp sheet W unwinds from the warp beam and passes over a whip roll d and thence to the conventional Weaving instrumentalities, not shown. The rate of advance of the warp sheet is controlled by suitable let-off controlling means such as that indicated generally at 5. The let-off mechanism includes a let-off shaft 6 which is geared to the warp beam yand revolves under control of the let-off controlling means 5.

'Ihe let-off shaft 6 is supported for rotation in a bearing 'I which is fixed to the loom side I in any suitable manner, not. shown. The position of the let-.off shaft in the loom being fixed, it is desirable that the various' warp beam positions be located along an arc of a circle the center of which is at the axis of the let-off shaft. With such a construction, warp beams of a relativelylarge diameter will be positioned downwardly as well as rearwardly from the position of a relatively smaller diameter Warp beam, the respective gears 8. on the warp beam being alike in each instance and remaining in` proper operative relation to the let-off shaft.

In accordance with the present invention, the loom side I is provided with an arcuate portion 9 the center of which coincides with the axis of the let-off shaft 6, anda warp beam bearing I0 is supported by this arcuate portion and adjustable therealong to adjust the position of the warp beam about the axis of the let-off shaft. It will be understood that a similar arcuate support and warp beam bearing are provided at the other side of the loom.

In the particular embodiment shown on the drawing, the arcuate portion 9 is in the form of a flange formed integrally with the loom side and of substantially the same width as the strengthening web II commonly provided on loom sides. 'I'his flange preferably extends from a point'directly above the let-off shaft 6 rearwardly and downwardly in arcuate form. The external surface of the flange 9 is provided with a series of pockets I2 which are spaced apart along the circumference of the flange. These pockets, as

shown, may be in the form of grooves or depressions extending across the flange transverse to the plane of the loom side. The inner side face I3 of the loom side is preferably flat.

The outer face'of warp beam bearing I0 contacts the inner face I3 of the loom side, but the bearing projects above and to the rear of the arcuate fla-nge 9. This outer face of the bearing IB is provided with integral lugs I4 and I5 which project into two of the pockets I2. The spacing of the pockets I2 and lugs I4 and I5'is such that the bearing IB may be moved along the angeg and the lugs selectively positioned in any of the several different pockets. These lugs are shaped to t snugly into the pockets whereby the warp beam bearing is irmly supported in any of several positions.

The main body of the warp beam bearing is provided with a single bearing surface I6 for receiving the journal 3 of the warp beam. The journal 3 may be held in the bearing by a beam lock I1 which is pivoted to the bearing at I8 and releasably locked to an upright standard on the bearing by suitable locking means I9. This beam lock is not of the present invention, it being disclosed and claimed in patent to C. D. Brown, No. 1,765,322, granted June 17, 1930 and to which patent reference may be had for a more complete disclosure,

The warp beam bearing I0 is adapted to be clamped to the loom side in any of the several positions to which it may be adjusted. To this end, the loom side may be provided with a series of holes 20, 2D to receive bolts 2|, 2| which pass through the loom side and warp beam bearing.

It will be seen that I have thus provided a construction wherein a single warp beam bearing may be supported on a loom side in any of a plurality of positions, to thereby accommodate any of the customary sizes of warpl beam. Furthermore, this desirable result is accomplished in a simple and inexpensive construction, which construction may be adapted to utilize any good, substantial form of beam lock. The invention is not, however, limited to the particular embodiment shown and described.

Having fully disclosed the preferred embodiment of my invention, I claim:

l. In a loom, a warp beam, a let-off shaft geared to said warp beam, a loom side supporting said let-off shaft, said loom side having an integral arcuate ange theV center of whichcoincides with the axis of said let-off shaft,'a warp beam bearing including a bearing surface in which said warp beam is journalled'and a beam lock releasably locked to the main body of the bearing, said bearing engaging and supported by said flange, said bearing and warp beam being adjustable along said flange about the axis of said let-off shaft, and means for securing said bearing to said loom side in any of a plurality of positions along said flange.

2. In a loom, a warp beam, a let-off shaft geared to said warp beam, a loom side supporting said let-off shaft, said loom side having an integral arcuate portion the center ofgwhich coincides with the axis of said let-off shaft, a warp beam bearing in which said warp beam is journalled, said bearing comprising a main body engaging and supported on said arcuate portion and adjustable therealong to adjust the warp beam about vthe axis of said let-off shaft and a beam lock releasably locked to said main body, and

'means for clamping said bearing to said loom side in any of a plurality of adjusted positions.

3. In a loom, a warp beam, a let-off shaft geared to said warp beam, a loom side supporting said let-off shaft, said loom side having an integral arcuate flange the center of which coincides with the axis of said let-off shaft, said flange having a series of pockets spaced along the circumference thereof, a warp beam bearing in which said warp beam is journalled, said bearing having integral supporting lugs adapted to be selectively positioned in any of different pockets of said series for adjusting the position of the bearing and warp beam about the axis of said let-off shaft, and vmeans for clamping said bearing to said loom side with said lugs supported in any of said .different pockets.

4. InY a loom, the combination of a loom side having a let-off shaft bearing and an arcuate portion the center of which coincides with the axis of said bearing, a Warp beam bearing having lugs projecting from one side face thereof and resting on said arcuate portion with said'side face in contact with one side face of said loom side, said yarn beam bearing being adjustable to any of a plurality of circumferentially spaced positions on said arcuate portion, and means for clamping said yarn beam bearing to said side face of said loom side in any of said positions.

5. In a loom, the combination of a loom side having a let-off shaft bearing and an integral arcuate flange the center of which coincides with the axis of said bearing, said flange having a series of circumferentially spaced pockets formed therein, a warp beam bearing having a plurality of lugs projecting from one side face thereof and adapted to be sup-ported in any of a plurality of different pockets in said series, whereby said warp beam bearing is adjustable about the axis of sai-d let-off shaft bearing and is supported by said flange in any of a plurality of adjusted positions, said side face of said Warp beam bearing being in Contact with the loom side, and means for clamping said warp beam bearing to the loom side with the bearing in any of said adjusted positions.

LEONARD M. ROGERS;