US503458A - Take-up mechanism for looms - Google Patents

Description

(No Model.) 2 sheets-sheet 1. A. D. EMBRY. TAKE-UP MEGHANISM POR LOOMS.

Patented Aug. 15, 1893.

No Model.)` 2 Sheets-#Sheet 2.

A. D. BMBRY. TAKE-UP MBGHANISM PoR LooMs.

No. 503,458. Patented Aug. 15, 1893.

UNITED STATES PATENT OFFICE.

ABRAM D. EMERY, OF TAUNTON, MASSACHUSETTS.

TAKE-UP MECHANISM FOR LOOIVIS.

SPECIFICATION forming part of Letters Patent No. 503,458, dated August 15, 1893.

Application led October 10, 1890. Renewed December l. 1892. Serial No. 453,685. (No model.)

To @ZZ whom it may concern:

Be it known that I, ABRAM D. EMERY, of Taunton, Massachusetts, have invented certain Improvements in Take-Up Mechanism for Looms, in which two pieces of fabric are woven simultaneously, of which the following is a specification.

The principal feature of this improvement consists in the employment of two positively rotated and suitably related sand rollers for taking up the two pieces of cloth respectively and delivering them evenly either to two friction rolls upon which the two pieces of cloth are wound separately, or delivering the two pieces of cloth imposed one upon the other to a single friction roll upon which the two pieces of cloth are wound into rolls with their convolutions interplaced.

An incidental feature of the invention consists in mounting upon the overhanging ends of the shafts of the sand rollers the train of gearing, by which the proper amount of motion is imparted to the sand rollers.

The accompanying drawings of the take-u p mechanism and so much of the loom structure as suffices to illustrate the construction and mode of operation of the improvements are as follows, viz:

Figure l is an end elevation of the take-up mechanism and upper portion of the loom. Fig. 2 is a rear elevation of the parts shown in Fig. l with the central portions of the rollers and upper cross bar of the loom frame represented as broken away. Fig. 3 is ati-ansverse section of the two sand rollers and a single roller upon which both fabrics are wound. Fig. e is a section of the gearing for driving the sand rollers, taken through the inclined plane indicated by the dotted line .frx on Fig. l. Fig. 5 is a transverse vertical section of the two sand rollers illustrating the use of two cloth rolls, one driven by the other, showing the lower cloth roll as being driven by friction from the secondary sand roller, and showing the higher cloth roll as being driven by friction from the lower cloth roll. Fig. 6 is an end elevation of a portion of the loom showing the take-up and its operating mechanism, and illustrating a modification which consists in the employment of two cloth rolls, each driven by friction from the upper sand roller. Fig. 7 is a transverse vertical section of the two sand rollers and of the two cloth rolls shown in Fig. 6.

The drawings represent the upper portions ot d of the side frames of the loom, and the upper cross-bar, et', which carries the take-up rollers and their attached mechanism. The lay a2 slides on vertical guide-rods, a portion, as, of one of which is shown in Fig. 1. The two fabrics h and b which are woven simultaneously are led upward respectively on opposite sides of the cross-bar of over the top of the lower or primary sand roller b2, thence partly around the secondary sand roller b3, thence to the single cloth roll b4, as represented in Figs. l, 2 and 3. The ends b5 b5 of the shaft of the cloth 'roll b4 ride up the inclined rails b h6, as the cloth roll h4 gradually increases in diameter. The two sand rollers h2 b3 are of the same diameter and are rotated at the same speed. The fabric b is in immediate contact with the periphery of the sand roller b2, and the fabric b is in immediate contact with the periphery of the secondary sand roller b3; hence the two fabrics are taken up evenly.

In the structure illustrated in Figs. 1, 2 and 3 the two fabrics are wound into a single roll with their convolutions interplaced, as illus trated in Fig. 3. If it be desired to wind the two fabrics in separate rolls, a second cloth roll, 197, may be supported upon the inclined rails b h6 above the cloth roll b4 where it will be driven by the impact of its periphery upon the cloth roll b4. In this case the fabric is led from the top of the primary sand roller b2 partially around the secondary sand roller h3, thence under and partly around the cloth roll b4 to the cloth roll bl, as indicated in Fig. 5. It' it be desired there may be employed a second pair of rails, be, inclined in the opposite direction from the rails D, for supporting the shaft of a second cloth roll, b9, in position to be rotated by the bearing of its periphery upon the fabric b, extending around the periphery of the secondary sand roller b3. In this modification the fabric b is wound upon the cloth roll b4, and the fabric l2 is wound upon the cloth roll b9, as shown in Fig. 7.

The gearing for driving the sand rollers ern` braces, first, the ratchet wheel c affixed to the sleeve c loosely mounted upon the overhanging end c2 of the shaft of the lower sand ICO roller, and held in place thereon by the washer c3 and its transverse key c4; secondly, the pinion c5 affixed to the sleeve c and meshing into Jthe teeth of the larger gear cl, affixed to the sleeve d loosely mounted upon the overhanging end cl2 of the shaft of the upper sand roller and held in place thereon by the flanged washer d3; thirdly, the pinion d4 affixed to the sleeve d and meshing into the larger gear e affixed to the overhanging end c2 of the shaft of the lower sand roller. Upon the standardsff are the boxes f2,f3,f4 andff", in which the shafts of the sand rollers are respectively journaled. The remainder of the gearing consists of the intermeshing pinions g and g', of like diameter, affixed respectively to the shafts of the lower and upper sand rollers. A step by step rotating motion is imparted to the ratchet wheel c by means of the pawl .72, provided upon its free end with the tooth h', and having its lower end pivoted to the crank arm h2 affixed to the hub h3 of the bell crank lever h4. One of the free extremities, h5, of the bell crank lever, is connected by the link h6 to the lay, and its other free extremity, hl, is connected by the link hs to one of the cranks', on the driving shaft t. By the vibration of the bell crank lever 7L4 endwise reciprocating motion is imparted to the pawl h, by means of which, during the downward movement of the pawl hthe ratchet wheel c is rotated and thus appropriate motion is imparted to the sand rollers and the cloth rolls. Backward motion of the Yratchet wheel c is prevented by the detent j, loosely mounted upon the pinj, and having affixed to its hub the weighted arm jz, by means of which the pointed end of the detent is held against the teeth of the ratchet wheel. By this mode of organization, the bell crank lever h4, provided with the crank arm h2, and linked, as described, to the lay and to one of the driving shaft cranks, is made to perform the double function of giving motion to the takeup mechanism and assisting in giving motion tothe lay. In the latter capacity the bell crank lever is described and claimed in pending application, serially numbered 367,206, tiled October 6, 1890, as an essential member of each of two trains of mechanism for transmitting motion to operate the lay in a laterally forward direction from a crank shaft in the rear of the loom.

It will of course be understood that the pawl h may have the proper reciprocating motions imparted to it from a cam or any part of the machine the rate of motion of which bears definite relation to the beat of the lay; but the mode of operating the pawl h by motion derived from one of the trains of lay-operating mechanism, as herein shown and described, is especially simple, direct and con venient. The organization is such that the pawl operates to impart motion to the ratchet wheel c when the lay is on its upward stroke, at which time the threads of the warp are under theleast tension. The number of teeth upon the ratchet wheel c is, for convenience, made to have a definite relation to the degree of fineness of the cloth; for example, if there are to be sixty-four picks to the inch, the ratchet wheel c may have thirty-two teeth, and the-proportion of the pinions c5 and d4 respectively to the larger gears d and e may be one to tive, so that in sixty-four picks the ratchet wheel will make two complete revolutions, and each of the two sand rollers will make one-fifth of a revolution; and assuming that the sand rollers each have a circumference of twenty-five inches, they will respectively take up one inch of each of the two fabrics during every sixty-four picks.

It will be seen that the ratchet wheel c is the prime wheel of the train of gearing for driving the sand rollers, and hence that the rate at which the fabrics are taken up can be changed by substituting in place of the wheel c, with its sixty-four teeth, another ratchet ent number-of teeth; and it will also be seen that if occasion arises, not only the ratchet wheel c, but the gears on the overhanging ends c2, d, of the sand roller shafts, can be removed, and another ratchet wheel or other gears, having any other desired relative proportions, can be substituted in the places of those removed, without removing the sand roller shafts from their bearings in the boxes ftfftfi- It is to be remarked that when the two fabrics are wound on the same roll, with their convolutions interplaced, as illustrated in Fig. 3, the fabric b will lie somewhat loosely upon that part of the fabric b which is in contact with the surface of the secondary sand roller, b3. rlhis, however, does not prevent the fabric t from being taken up on the cloth roll, b4, although it may occasionally buckle, and thus form small transverse folds which will be carried into the space between the convolutions of vthe fabric l) on the cloth roll b4.

In taking up upon the primary sand roller two fabrics, one lying upon the other, inasmuch as the radius of the curved surface over which the outer fabric passes, is increased by the thickness of the inner fabric which lies directly upon the surface of the primary sand roller, it is necessary that the two fabrics shall be permitted to slip one upon the other. The provision for securing this result consists in such an arrangement of the two sand rollers, relatively to each other, that less than one half of the surface of the primary sand roller is employed for taking up and guiding the fabrics to the secondary sand roller. In taking up a single fabric it is usual to pass it around more than one half of the surface of the primary sand roller, but in the present case, the extent of the surface of the primary sand roller which is employed is so limited that the friction resulting from the suywheel of different diameter having a differ- IOO ITO

per-position of the two fabrics thereon is not great enough to prevent the required slipping of the fabrics one upon the other.

In the modifications illustrated in Figs. 5 and 7, there is the same slip of the fabric b Where it passes around the primary sand roller, but the two fabrics are Wound equally close upon the tivo cloth rolls, Without any slacking or loosening of the fabric Z1 in its passage around the secondary sand roller.

What is claimed as the invention isl. The combination with the Weavin g mechanism of a loom for Weaving two fabrics side by side, of primary and secondary sand rollers, gears for driving the said sand rollers at like surface speed respectively in opposite directions, and a cloth roll or rolls for taking from the secondary sand roller two superimposed pieces of fabric delivered from the primary sand roller; when the primary sand roller is so arranged relatively to the secondary sand roller that the superimposed fabrics pass around less than one half of the periphery of the primary sand roller, substantially as and for the purposes set forth.

2. The combination of the sand rollers b2 and b3, geared to each other by the intermeshs ing pinions g and g', the overhanging ends, c2 and d2, of the shafts of said sand rollers, the gear c, aflixed to the overhanging end d2 of the sand roller b2, and the toothed Wheels, c and o5, d and d4, removably mounted upon the overhanging ends c2 and d2 of the shafts of the sand rollers b2 and b3, respectively, as and for the purposes set forth.

ABRAM D. EMERY.

Witnesses:

EDGAR L. CRossMAN, GEORGE L. WHITE.

Images