US58968A - Improvement in mechanisms for operating the harness of looms - Google Patents

Description

UNITED STATES PATENT OFFICEc VILLIAM It. ANDREWS, OF MYSTIO RIVER, CONNECTICUT.

IMPROVEMENT IN MECHANISMS FOR OPERATING THE HARNESS 0F LOOMS.

Specilication forming part of Letters Patent No. 58,968, dated October 23, 1566.

To all whom it may concern s Be it known that I, TVILLIAM R. ANDREWS, of Mystic River, in the county of New London and State of Connecticut, have invented anew and useful Mechanism for Operating the Harness of a Fancy Loom; and I do hereby declare the same to be fnlly described in the following speciiication, and represented in the accompanying drawings, of which- Figure 1 is a top view, Fig. 2 an end elevation, and Fig. 3 a transverse and vertical section, of a loom-frame with my invention applied thereto.

In such drawings, A denotes the said frame without either the lay or theharuesses usually applied to it.

B is the lay-shaft, and (l is a frame for snp porting the mechanism for actuating each harness, such frame being applied to one end of the loom-frame A.

Within the frame C there is arranged, in manner as represented, two or more tri-armed levers, D D, their common fulcruin heilig a rod, a, going through and supported by the said frame U.

The lifting and lowering cords of each harness, after being passed about certain proper guides or wheels, are to be attached to the two longer arms of one of the tri'armed levers, the same being so as to cause the harness to be raised by the movementof the lever in one direction, and to be depressed byits movements in the opposite direction.

The shorter arm, b, of each of the said levers D extends between two cams, E F, which are arranged upon, and so as to be capable of being revolved on, two stationary rods or shafts, c d.

To the side of each cam, and so as to be concentric with the camshaft, a gear, e, is fixed, which is designed to revolve the cam by engagin g with two vertical racks, G H, arranged as represented in Fig. 3. There is thus combined with each triarmed lever two cams and two racks. One of these racks has a notch, f, arranged in it, as shown in Fig. 3, the other being without any such notch.

There is also applied to the frame C, and so as to extend down from it in the plane of the two racks, a spring, I, there being such a spring for each pair of racks. A pattern-prism, 1c,

and chain, K, such as is common to fancy looms,

are arranged with respect to such springs, as represented in the drawings.

The next part ot' the mechanism to be described is what may be tcrmedthe rack-elevating mechanism. A jack or hooked arm, K, turning freely on a rod, h, supported by two arms, t i, extending from a rockershaft, k, extends up through a slot, l, madein the bottom piece m of the frame C, and is arranged inthe plane of the two racks andthe spring thereof.

Aconnectingrod, n, projecting upward from and -jointed to a joint-piece, o, is applied to a crank, p, affixed upon the lay-shaft B, the said joint-piece being jointed to one of the arms During each revolution of the layshaft a reciprocating vertical motion will be imparted to the two arms i i and their rod h, whereby the several jacks K' will be elevated and depressed simultaneously.

The mechanism for revolving the patternprism may be thus explained On one end of the arbor of such prism is iixed a ratchet, q, against the inner side of which a friction-brake or spring, r, bears, such spring bein g fastened to the frame (l. An impellin g or hooked drawpawl, s, jointed to a lever, t, engages with the ratchet, such lever being connected with the rod h by means of a connecting-rod, u, the whole being as represented.

During the movement ofthe pattern-chain, its projections will operate against the series of springs I I in the order necessary for the formation ofthe figure to be woven, the operation being to force each spring inward at the proper time or times, so as to insure it to press its jack inward, in order that during the upward movement of such jack it (the jack) may engage with the inner of the two racks and force it upward. While such rack may bc rising the fellow rack will be correspondingly going downward, and the cams will be worked simultaneously, in which case the lower one of them will raise the arm Zi of the lever D, the other cam revolving, so as to permit such elevation of the arm to take place. This n1ovement of the arln will canse the tri-armed lever to be moved so as to move its harness in one direction.

As soon as the pin of the pattern-chain may have ceased to press upon the spring by which the aforesaid jack was moved inward, such jack will be freed from the pressure of the lla spring, and Wilt be thrown buck by the action otgruvity and out of connection with the rack, so as not to pull it downward.

rlhe two cams will then hold the tri-armed lever rigidly in its position until the next elevation of thejack, which taking place, the jack will he forced up against the outer of the two racks and force it upward, and thus effect movements of the czuns such as will move the triurmed lever in a direction opposite to that in which it was previously moved.

To insure the discharge ot'eflch ofthe hooked jacks from the notch of the rack during an ascent of the jack m1d1ack,eech jack has zt com, fr, fixed to it to uct against the end oi the slot, l.

The above-described invention is very effective und positive in its operation.

I claim- The above-specified new and useful harnessoperating mechanism or combination, consisting of the trimmed lever D, the two cams E F, the gears e e, and racks G H, the spring 1, and the rack-elevating mechanism, the whole heilig arranged together, and with t patternchain and its actuating mechanism, substantially in manner and so as to operate as expluined.

WM. R. ANDREWS.

Witnesses F. P. HALE, J r., 1t. Il. EDDY.

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