US99044A - Improvement in let-off mechanism for looms - Google Patents

Description

waited Staten @tutti @twine Letters Patent No. 99,044, dated January 18, 1870.

IMPROVEIVIENT IN LET-OFF MECHANISM PQR LOOMS.

The Schelule referred to in these Lettera Patent and making part of the same.

To all whom 'it may concern Be it known that we, DANIEL LONG and JOHN PRESTON, of Fairview, in the county of Erie, and

State oi' Pennsylvania, do hereby declare that we have invented new and improved Automatic Tension-Levers for Looms, and that the following is a true and exact description of the same.

The nat-ure of our invention consists in providing tension-le vers for looms,so constructed that the wei gh ts on the same are automatically moved by the action of the beam, so as to regulate the tension, as the warp is unwound from the beam.

Our invention is shown in the accompanying drawings as follows, like letters referring to like parts:

Figure 1v represents our invention as it appears in the loom.

Figures 2 and 3 are detached portions of a loomfiame, showing the points and manner in which our invention is attached.

Figure 4 is a sectional end view of one of the levers.

Figure 5 is a sectional view of one of the levers at the point where it is attached to the loom-frame.

In iig. 1, the brakes F and G pass around the beamroller A, and are attached, respectively, to the loops or bows D D and E E, on the levers B and C, and the cross-bar I.

Attached to the levers B and C, and working in slots, are the slides H H', to which aresuspended the weights H H, which increase or diminish the friction upon the beam A by their tension upon the bauds F and G, which tension is regulated through the movement of the levers B and C, resulting through the movements of the screw S aud the slides R R, the latter acting as fulcra for the levers B and C.

'lhe screw K is automatically operated by the pulley attached to shaft 1n, which is connected to it by means of the joint L, attached to the shaft m, which is journaled, at the point P, upon the lug T.

This screw operates the slide H', weight H, and lever B, and also the slide H', weight'H, and lever O, on the opposite end of the loom, which latter are connected with `the lever Band pulley and shaft m, above mentioned by the cord or belt J, and worked by the same.

The method of .operation is as follows:

The beam A being empty, the weights H H are moved to the outer ends of the slots iu the levers B and C, thereby relieving the beam A from the pressure lof the brakes F and G; but, as the operator winds the so that slide H' slips inward with the weight H, there-v by producing the proper tension upon the beam or roller A. v

IVhen the operator begins weaving, the pulley attached to the shaft m revolves the screw K, carrying the weights H H downward and outward, thereby automatically decreasing the tension upon the beam or roller ,A as the yarn isA rolled off. y

By these devices, we secure a uniformity in the numberkof picks per inch in the cloth woven. This motion of the weights is certain and accurate, and, if the levers B and C are graduated, the operator can, at any time,.tell exactly how many yards of cloth have been woven.

XVhat I claim, and desire to secure by Letters Patent, is-

1. The screws S S, in combination with the slides R R and levers B and C, when operated in the manner substantially as described, and for the purpose specified.

2. In combination with the tension-bands F and G, the levers B and C, slides R R and H H', and weights H H, and screws S S, the whole arranged and operated in the manner and for the purpose specified.

3. The levers B and O, loops or bows D D and E E, slides R R, screws S S, and slides H H', when applied to looms in the manner and for the purpose speciiied:

DANIEL LONG. JOHN PRESTON.

Witnesses:

JNO. K. HALLocx, Guns'. P. BIDDLE.

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