US84253A - Improvement in let-off mechanism for looms - Google Patents

Description

,Pste-ut i @man esse/fe THOMAS BOOTH AND CHARLES CARROLL SANDERSON, OF NOR- WAY, MAlNE.

Letters Patent No. 84,253, dated Noce1nber24, 1868.

IMPROVEMENT IN LET-OFF MECHANISM FOR LOOMS.

The Schedule referred to in these Letters Patent and'making part `of the same.

To all whomv it may concern:

Beit known that we, THOMAS BOOTH and CHARLES CARROLL SANDERSON, both of Norway, in the county of Oxford, and State ofMaine, have invented anew and useful SelflAdjusting Let-O" Mechanism for Looms; and we hereby declare the following to be a full, clear, and exact description thereof, which will enable others t0 make and use our invention, reference being had to the accompanying drawings, forming part of this speciiicatiou, in which is shown a view of a loom-beam with our improvement thereto attached.

In the drawings, a shows the part of the loom into which is set the journal of the beam b.

The part c showsthe size of the full beam.

b, the empty beam, or when there is no yarn thereon;

It is well known that when cloth is being manufactured, the weaver is directed to make the web with a certain' number of picks to an inch, for instance, and

matic, aud is, moreover, liable to be 'tampered with by the operator, who, in the absence of the supervisor, cau change the rapidity of the delivery of thegyarus, and so diminish the number of picks to an inch, and, in consequence, the irmness, solidity, and uniformity of the web. lVhen, as is usual, the operator is paid by the yard, this change is often m'ade, in order to accom,- plish a larger amount of work within a day, ora'ny `given time.

Our invention seeks to place it within the power of the supervisor to arrange the delivery of the yarns so that they shall be uniform throughout the whole web, and to make this regulating-device automatic in operation, and so that it cannot be changed by theoperative.

d shows a standard, attached to the cross-beam e,

'nearthc bottom of the loom. Ithas a )nvot at j, upon which are hung the cross adjusting-:ums g g. These arms can open or close, swinging Ourthe said pivot.

Connected with r/ y, at h h., are the connecting-rods i yi., which are also connected with the weights j j. These weights have holes, tlu'ough which pass the arms, L 1.', which are pivoted to the frame of the loom at m lm. From these aruis It' It friction-bauds pass up over the beam, or a truck thereon. (See n n.) At the lower end ofthe armsg y are adjusting-plates o o.

The operation is as follows:

As the beam revolves, and the yarns thereon wind off, the plates o o are all the time kept pressed up against the under side of the yarns wound around the beam, and are thus held by the operation ofthe Weights,

. the weights j j are up near the Lipper ends of the arms k k, making a greater leverage than when further down, and so pressing or binding the bauds fa n more tightly over the beam or its truck, andas the weights go down on the arms k 7c, the binding` of n n, or their friction, is diminished iu proportion as the cylinder from which the yarns are removed grows smaller in diameter, and thus the revolution of the beam b is somewhat accelerated, and the yarns always delivered uniformly. The result of this is appa-rent.

When the loom. is gauged to a certain number of picks to the inch ou the web, by means of the weights, the device is then self-adjusting, and the whole Web is made of uniform closeness of texture.

Practice will readily determine the necessary weight of j 7' for different numbers of picks to the inch, and the length of arms 7s la, and these cau be provided for all varieties of web.

New, it will be seen that when once set to a certain .Dumber of picks to the inch ou the web, the weaver has no power to change the standard, as with the old form, and thus accelerate the weaving and change the texture ofthe cloth.

It is apparent that a variety of forms of the levers g g can be employed, or a cam could be used instead of them, or gearing, but the principle of operation would be the same, the device being governed by the weights sliding on arms k L.

XVe do not limit ourselves to the exact device herein shown.

What we claim as our invention, and desire to secure by Letters Patent, is-

The combination of standard d, arms g g, rods t i, weights j j, arms L k, bands n n, with the beam b, as and for the purposes herein set forth.

THOMAS BOOTH. CHARLES CARROLL SANDERSON. Witnesses:

WM. WmrHIGIN, H. UrrroN.

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