US762642A - Shuttle-brake. - Google Patents

Description

No. 762,642. PATENTBD' JUNE 14, 1904. J. LAFORT.v

SHUTTLE BRAKE.

- APELIOATION FILED FEB. 27, 1904.

N0 MODEL.

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Patented June 14, 1904.

PATENT OFFICE.

JEAN LAFORET, OF ETOILE, FRANCE.

SH UTTLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 762,642, dated June 14, 1904.

Application tiled February 27, 1904. Serial No. 195,619. (No model.) R

To Cal/Z whom, it muy concern:

Be it known that I, JEAN LAFORET, acitizen of the French Republic, residing at Etoile, De'- partment de la Drme, France, have invented certain new and useful Improvements in Shuttle-Brakes, of which the following is aspecification. Y

This invention relates to improvements in shuttle-brakes.

l/V ith the looms hitherto used it frequently occurs, especially when' the speed of working is irregular, that the shuttle after entering its box recedes again to some extent, owing to the impact produced. This produces irregularities in the unwinding of the thread, looping of the weft, and consequently frequent ruptures. V

My invention is illustrated in elevation in the annexed drawings, in which- Figure 1 is a plan, and Fig. 2 an elevation, representing one form of construction; and Fig. 3 a plan, and Fig. 4 an elevation, of modification specially adapted for looms having a plurality of shuttles.

The object of my invention is to` remove the disadvantage referred to by positively locking each shuttle when it arrives at the end of its travel in such a manner that itis not released again till the next stroke of the picker.

Referring to Figs. l and 2, the apparatus essentially comprises an oscillating part c, pivoted at e' and having the shape of an anglesquare provided with grooves, in one of Which a rule 6 is adapted to be moved and in the other an angle-square 0.- The ruleand square c are adapted to be held in adjustment by means of screws l and c, respectively. Through the end of the rule passes a hollow screw f, in which is arranged a spring g, which bears on a collar or cup L, fixed to one of the cam-levers v1, which act as brakes for cushioning the shuttle. This lever t' is preferably made of wood and is fixed to a metal plate j', pivoted at to a support Z, the position of which can be regulated to and from the shuttle-box along adovetail guide on the bracket n and held, by means of a pin and nutm, on bracket n. The stroke of the lever fr.' can be regulated by means of the screw o, which can be screwed to a greater or less distance into the lay,'according to the efficacy of the brake-action required. The square c rests against the bridge p, fixed to the end of the second cam-lever Q. This lever is also preferably made of wood and is fixed to a metal r'ulc fr, pivoted at s to a support horizontally adjustable on the bracket s@ The extent to which the lever moves is regulated by the screw t. This arrangement allows of regulating' the respective lengths and positions of the various parts and of adapting the apparatus to looms of all sizes and kinds.

The action of the apparatus is as follows: Vhen the shuttle is thrown in the direction of the arrow, it first rubs against the curved part of thelever z' and causes the latter to rotate about its pivot and at the same time the part a to rotate about its pivot e. The shuttle then rubs against the curved part of the lever q, which rotates about s, and pushes, by means of the bridge p, the square c of the part a. The latter then oscillates in the opposite sense to that previously described, and the lever c' is moved by the pressure of the screw f. The shuttle is thus locked between tlie two curved levers and cannot move back except when it receives Ysudden impulse given by the picker. The latter preferably consists of a suitable number of thin wooden blades fastened together side by side and then out in the ordinary way.

The modification illustrated in Figs. 3 and 4 is based on the same principle and has the advantage of occupying less room, so that it can be conveniently used in looms having several shuttles. The part t2 is preferably made in two parts, one of which has a shoulder u, preventing the movement in one direction, whereas a spring o gives a relative elasticity in the other direction. The-curved levers of the form of construction previously described when moving in the direction of the arrow moves the projection rc and passes by the lever and then moves the projection y, which IOC causes the lever a2 to oscillate and presses the irst projection strongly against the shuttle, which is thus held fast at three points and cannot move until the stroke of the picker releases it.

I claim- 1. In a loom-shuttle box the combination with two successively operative shuttlebrakes, of an oscillatory beam bearing,I at its ends respectively against the one and other of said brakes for the purpose set forth.

2. In a loom-shuttle box the combination with two successively-operative pivoted shuttle-brakes, of an oscillatory beam having adjustable bearingl at its ends respectively against the one and other ot' said brakes for the purpose set forth.

3. In a loom-shuttle box, the combination with two successively operative shuttlebrakes, ot' an oscillatory beam bearing at one end positively against the rearmost brake and at the other end resiliently against the foremost brake for the purpose set forth.

4. In a loomsshuttle box the combination with two successively operative shuttlebrakes of an oscillatory beam adjustable in length and having" vertically-adjustable ends bearing respectively against the one and other of said brakes for the purpose set forth.

In witness whereof I have signed this speci- {ication in the presence ot' two witnesses.

JEAN LAFoRIT.

Witnesses:

MANN VAoHoN, GUILLAUME Pioonn.

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