US102506A - Improvement in let-off mechanism for looms - Google Patents

Description

'tnted States JOHN DAY, OF PATERSON, NEW JERSEY.

vLetters Patent No. 102,506, dated May 3, 1870.

IMPROVEMENT IN LET-OFF MECHANISM FOR LOOMS.

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

To all whom it may concern Be it'knownthat I, JOHN DAY, ot Paterson, in the county of Passaic and State of N ew Jersey, have invented a new and improved Compensating Let-oft' for Looms; and I do hereby declare that the following is a t'ull, clear, and exact description thereof', which will enable others skilled in the art to makeand use the samc,1'et'erence being had to the accompanying drawings' forming part of this specification. ,f'

`This invention relates to in'iprovements in letif motions t'or looms, and consists in th applicatim, in addition to the ordinary warp-roll, of an auxiliary roll,-mountcd-on a vertically-sliding and weighted frame, under which the warpis carried from the warp'- roll, and to another guiding-roll, which, together with then'arp-rolh'areelevated in a` vertical extension ot the loom-frame, so that the weight ofthe auxiliary roll, frame, and weights is suspended in the hight of'.

the warp, which passes over another guide-roll in the plane ot' the iirst, and down under a third guide-roll, and thence through the sley to the work-beam. Previous to passing under the tina-l guide-roll, the warp passes through a sley or reed, for guiding it evenly ou the said roll.

llhis improved attachment is designed to provide a better means for producing uniform tension in the warp, and relieving the shocks thereon due to the beating up of the lay, which vary materially withthe atmospheric changes, especially silk and cotton warp,

` the working otf which this apparatus is especially designed for. l

Figure l represents a longitudinal sectional elevation of my rimproved let-oft" attachment, and

Figure 2iis a rear elevation of the same.

lSimilar letters ot' reference indicate corresponding parts. f

A is avertical and rearextension ot the loom-trame, at the rear upper corner ot' which the warp-roll B' is mounted. 1t is provided with any preferred arrangement of friction devices. In this instance I have represented a friction-cord, C, wound once or more around' the grooved pulley, and connectedto the spring D.

E is the auxiliary roll, mounted in a sliding and weighted frame, F, below the roll B, working in the vertical guiding-grooves, G, in the rear posts ofthe extension frame.

H and I are guide-rolls, mounted on the top of the frame, and

K is another guide-roll, mounted in the front posts oi' the extension t'ramc A, in lthe horzontalplane ot the work-beam.

The warp is carried t'rom the roll B, under E, over H and I, and under K, and thence through the harness and sley to the work-beam and cloth-roll, in the usual way.

By this arrangement, the warp is placed under tension throughout a much greater 'dista-nce after leaving the warp-roll, and 'bet'ore winding on the cloth-roll, whereby it will stretch more under the sudden strains ot' the reed in heating up, and, being carried under the auxiliary roll, .which is capable o t' rising and falling as the tension increases or diminishes, the variations in the strain on the warp, due to beatingup, or to atmospheric or other causes, will be compensated for in an eljcient and reliable manner, so that the tension on the \rarptln eads will lbe equalizctl morenearly than is the case with the present arrangements, no matter how wide the warp may be.

rjhis vertical extension of the frame and elevation ofthe guide-rollers over which the warp is carried at'- ford convenient access to the warp, for the attendant to clean the same, as it is working through the loom.

Having thus described my invention,

I claim as new and desire to secure by Letters 'lhe combination, with the warp-roll ot a loom, of the auxiliary roll, mounted in a vertically-sliding weighted frame, and guide-rolls H, I, andv K, when the said warp-roll and guide-rolls H I are ar anged, as shown, in a vertical extensioirof the 100m-frame, substantially as specilied.

. JOHN DAY.

Witnesses:

GEO. W. MABBE, E. TATE.

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