US2009148A - Lay motion for looms - Google Patents

Description

J Y 1935- v 0. v. PAYNE 11 2 LAY MOTION FOR LOOMS Filed April 16, 1931 Patented July 23, 1935 Oscar V. Payne, Worce Crompton & Knowles ster, Mass, assignor to Loom Works, Worcester,

Mass, a corporation of Massachusetts Application April 16, 1931,

Serial N0. 530,565

4Claims. (01429-190) This invention relates to improvements in lay motions for looms and it is the general the invention to providean improved drive for the lays of long looms.

In certain types of looms which weave fabrics several hundred inches in width the torque or twist of revolving shafts is such as to interfere seriously with the proper motions of the lay. It has been proposed heretofore to cause forward movement of long lays by placing a driving member under tension and connecting it to the lay at a plurality of points. It is an important object of my invention to provide in connection with this type of lay motion an improved means for moving the lay rearwardly by a positive mo-. tion so as to insure an increased dwell for the flight of the shuttle. In this connection it is desirable to allow the lay to remain at rest in its rearward position while the shuttle is in flight.

In previously proposed constructions of this type it has been customary to store energy in a spring or similar device as the lay is beatingup, this energy being used to return the lay to its rearward position. In such a construction the driving parts on the lay are called upon to provide energy for the forward and also the rearward movement of the lay at thesame time thereby increasing the strain of the parts and the maxi-, mum power requirement. It is an important object of my present invention to provide means for moving the lay forwardly in a positive manner and also rearwardly by positive connections, the forces to accomplish the back and forth motion of the lay being derived from the loom successively instead of simultaneously.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a top plan view of a portion of a loom having my invention applied thereto,

Fig.2 is a front elevation showing certain parts of the structure set forth in Fig. 1,

Fig. 3 is an end elevation taken in of arrow 3, Fig. 2,

Fig. 4 is a detailed vertical section on line 4-4 of Fig. 1,

Fig. 5 is a the direction detailed section on line 5-5 of Fig. 1,

d Fig. 6 is a horizontal section on line 6-6 of Fi g. 3. Referring to the drawing, I have shown a loom object of frame l0 having a breast beam II and a lay l2. The latter carries a reed l3 and may be supported in any approved manner so as to be movable toward and from the breast beam. A plurality of forwardly extending links 15 are pivotally connected to the lay,.the rear end of each link being movable about a vertical lay carried pivot pin 16. The forward end of each link is connected as at IT to a bell crank lever I8. Each bell crank lever is pivoted about a vertical stud l9 fixed with respect to the breast beam H. A transverse driving rod 20 extending preferably over and along the breast beam and under the cloth has connection with each of the bell crank levers at points designated herein at 2|. 1 g

The bar 20 may be connected by a link 22 to the upper end of a-lever 23. The latter is pivoted as at 24 at the lower end thereof to a fixed stand 25. A cam 26 secured to a revolving shaft 21 has a dwell surface 28 and an inclined rise and fall surface 29. A roll 30 as shown in Fig. 6 is supported by a stud 3| which bridges a forked part of the lever 23, and engages cam 26 as the latter rotates. I

By means of the matter thus far described reciprocations of the bar 20 are either causedor permitted by the cam 26. This structure may" be substantially the same as that shown in patent to Wilson No. 1,415,286, the lay being moved forwardly by a positive movement derived from the lower part of cam face 29 as viewed in Fig. 2 with the cam rotating in the direction of ar row A.

My invention relates more particularly to means for causing the backward movement of the lay after the latter has beaten in weft, and in carrying my invention into effect I provide a second lever 40 movable about a fixed pivotal support 4| carried by the stand 25a. Lever 4!] is provided with a roll 42, similar to roll 30, to engage a cam 43 which has a dwell 44 and a recess 45. The lower end of the lever is attached by means of a connector 46 to a cable or other tension member designated herein at 41. The latter extends across the loom and has pivotal connection as at 48 with the lower end of rocking lever 49. The latter is mounted for oscillation on a fixed stud 50 supported by a stand 5|. The upper end of lever 49 may be attached by means of an adjustable connector 52 to the right hand end of the bar 20, as indicated in Figs. 1 and 2.

When the shaft 21 rotates the inclined conjugate surfaces 29 and 45 will have such relation with their respective rollers that the upper running of the loom mthout depriving the shut tle of sufiicient time to get across the loom.

Those parts of the cam inclines which lie within the same angle with reference to the axis of shaft 21 are related so that the rod 26 has a measured motion at both ends. This result is attained herein by having the actuating cam levers of equal throw and pivoting the lever 49 at'its center. By this arrangement one cam lever moves in one direction by an amount equal to the opposite movement of the other cam lever in the same time. I

By means of the mechanismdescribed I have provided a lay motion wherein two cams operate in conjunction to reciprocate the lay, each cam giving a motion which is the complement of the other cam so that as one cam operates to require the lay to move forwardly for lnstance the other cam will reliquish its control to permit such forward motion. Both cams will ordinarily be operatively related to the lay as the latter moves backwardly or forwardly, and each cam will have one part to move the rod 20 in one direction and another part to-permit movement of the rod in the opposite direction.

Having thus described my invention it will be seen that changes and modifications may be made 1. In a loom having a lay, a pair of oppositely reciprocating conjugate cams at one end of the loom, a rocking lever at the other end of the 2. In a loom having a lay, a single reciprocatl'ng member extending along the lay, operative actuating member imparting positive movement to said member in the opposite direction by a force transmitted through the rocking lever.

bers alternate positive movements.

4. In a loom having alay, a pair of members OSCAR V. PAYNE.

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