US908724A - Friction let-off mechanism for looms. - Google Patents

Description

APPLICATION IILED MAR 18, 1908.

Patented Jan. 5, 1909.

5 .N H MM 5 m 5 3 5 z 1 z 0 w \6 W 0 0 W. ,7 1. WW 0 1 rirrun ASHBY, or on'x'r RA; FALLS, RHODE lbLA FRICTION LET-GEE IJKECHANISM FOR LOOMS.

pecilication of Letters Patent.

Patented Jon. 5, 1909.

Application filed March 18, 1933. Serial No. 421.833.

. of Rhode lslund, have invented new and tel weight 'crum stud by a split pin 13 useful Improvement in Friction Let ll Mechanism for Looms, of which the following is a specification.

This invention has reference to an improvement in looms and more mrticulurly to an improven'icnt in friction lctolf mechanism for looms.

The object. of my the construction of a friction let oll nicchmn ism for looms whereby the tension meclrzmism and weight are decrmised in size and the tension or friction on the warp honm is mlimits. 1

creased or may he varied within wide My invention consists in the peculiar and n vel construct-ion of a'friction let oll mechanism consisting principally of a series of A series of live trm'isverse holes l8 l8 invention. is to improve 1 end adopted to extend through the trans the lever is secured to the fulcrum stud 6 by a 13; a. horizontal lever .7 having a through one of which the lever is pivotu-lly secured to the stud I by :1 split pin 13; n horizontal lever ll) having; o vertical hole 2o in its inner end, as shown in broken lines in l ig. 2, and i1. series of transverse holes 2] '31 through one of which the lever is pivotally secured to the stud S by a split pin 13; and a series of vertical connecting links 22, 23 and 24 each of the connecting links having a pin 25 at each l6 16 through one or much pivotnlly split pin verse holes in the lovers and removubly secured to the lovers by a split pin 13 through d hole in the end of the pins, as shown in Fig. 3. The link 22 connects tlie'outer ends of the levers 9 and i l, the link 23 connects the 1 inner ends of the lovers l4 and i7, and the I link 2% connects the outer adjustable compound levers operated liy o.

comparatively light weight and operntively connected with the warp and having; details of construction as will he more fully set forth hereinafter and claimed.

Figure i is :1 hack view of u l om provided with my improved friction let oll' mechnnism and showing: the some opcrntivcly connected with the warp beam of the loom. l ig. '2 is an enlarged face view of the tension mechanism removed from the loom to clearly .show the construction of the some, and Fig. 3 an enlarged detail sectional view taken on line 3 3 of Fig. 2, sl'iowing the pivot construction of the; levers and connecting: links.

in the drmvings, (1' or ind' frames, 1) the hack cross rail, 0 the warp beam, 11 the warp, and r the guide roller ol a loom provided with my improved compound Warp beam tension. mechanism which consists of e plate 4 llztVlIlQ a series of four fulcrum studs 5, 6, 7 and h on its face and secured to the side frame a under the warp beam 0, shown in Fig. l 3 e horizon lever 9 having the notches ll) 10 for the weight 11 and a series of five? transverse holes 112 12 through one of wl'rieli. the weight lever is pivotully secured to the lid 7 through the outer end of the stud; u comparatively short horizontal lever 14- having; a vertical hole 15 in its inner end, as shown in. broken lines in Fig. 9 and a series of live transverse holes ahle hook 26 is held in the heam of u loom.

ends of the lovers 1? and 19, as shown in Fig. An adjusthole in the end of the/ lever 19 by a nut 27. and n cord 28 is secured at one end to the hook 26, carried around the warp l){tl11 0 one or more times,

1 and the other end carried down and secured to the hoclt cross rail 1'), as shown in l i l. llic tension or friction of the cord 38 on the warp ileum c may he vol-led within wide limits by changing the position of the weight l l on the weight lover S), by changing the posilions of the lovers 9, H, l7 and if) on the rule the side i l l studs (j, 7 and 8. by changing the position of the comuicting; links 22, 22-; and Z-l on the lovers, or by removing: the lovers 17 and if) and the links 23 end 24: and connecting the hook 26 with the end of the lever i l through the vertical hole l5 in the end of lhe lover.

in. the operation ol my improved wurp beam tension llifl'lizllilsm, the friction of the cord 28 on the warp hemn c through the i i r a a l l weight ll mid compound lovers .3, 14, 17 and 1!) cites the required tension on the warp heum.

hesnn tension mechunism on looms any required tension on the warp beam may be easily and quickly obtained and when required to run the warp threads heel: the weight lever and compzirntirely light weight- Inoy he lifted with sight exertion hy the operator.

it is evident that my improved warp beam tension mechanism may-be used on either or both sides of a loom and that nnynumhcr of levers and connecting links may be used without materially affecting the spirit of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a loom, a warp beam tension mechanism comprising a plate secured to the loom frame, a system of compound levers pivotally secured to the plate, an adjustable weight on the lower lever, a cord or its equivalent eratively connecting the upper lever with t e warp beam, and means for adjusting the levers on the plate.

2. In a loom, a warp beam tension mechanism comprising a platesecured to the loom frame, a system of compound levers pivotally secured to the plate, links pivotally connecting the levers, an adjustable weight on the lower lever, a cord or its equivalent secured at one end to the upper lever, carried around the warp beam and secured at the other end to the loom frame, means for adjusting the levers on the plate and means for adjusting the links 011 the levers.

3. In a loom, a warp beam tension mechanism comprising a plate secured to the loom frame under the warp beam, a system of con pound levers consisting of a lower weight lever, an upper lever, and one or more inter-- mediate levers pivotally secured to the plate, links j ustable weight on the lower lever, an adjustable hook in the end of the upper lever, a cord or its equivalent secured at one end. to the adjustable hook, carried around the warp beam; and secured at the other end to the loom frame, means for adjusting the levers on the plate, means for adjusting the pivotally connecting the levers, an adlinks on the levers, and means for adjusting the weight on the lower lever.

4c. In a loom, the combination with the side frames 0, a, the back cross rail 5, and the warp beam 0, of a warp beam tension mechanismf, comprising a plate 4 having the fulcrum studs 5, 6, 7 and 8 and secured to the loom frame nder the warp beam 0, lever 9 having the notches 10 10, an adjustable weight 11, and a series of transverse holes 12 12 through one of which the lever is pivotally secured to the stud 5 by a split pin 13 through the end of the stud, a lever 14 having a vertical hole 15 and a series of trans verse holes 16 16 through one of which the lever is pivotally secured to the stud 6 by a split pin 13, a lever 17 having a series of transverse holes 18 18 through one of which the lever is pivotally secured to the stud 7 by a split pin 12%, a lever 19 having the vertical hole 20 and a series of transverse holes 21 21 pivotally secured to the stud 8 by a split pin 13, a series of connecting links 22, 23 and 24 having a pin 25 at each end adapted to extend through the transverse holes in the le vers and secured by a split pin 13, an adjustable hook 26 held inthe-end of the lever 19 I by a nut 27, and a cord 28 or itsequivalent secured at one end to the hook 26 carried a weight g around the war beam 0 and secured at its other end to the )ack cross rail 1), as described. In testnuony whereof I have signed my name to this specification 1n the presence of two subscribing witnesses.

PETER ASHBY. Witnesses ADA E. Heenn'ri', J. MILLER.

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