US286081A - Eobeet simon - Google Patents

Description

(No Model.)

R. SIM O N.

POWER LOOM. No. 286.081. Patented Oct. 2, L883.

ATTORNEY "nu'rnn STATES PATENT tries,

ROBERT SIMON, OF VEEHAXVKEN, NE\V JERSEY.

POWER-LOOM.

SPECIFICATION forming part of Letters Patent No.286,081, dated October 2, 1883.

Application filed March 20, 1882. (No model) To all whom it may concern.-

Be it known that I, ROBERT SIMON, of \Veehawken, (town of Union,) in the county of Hudson and State of New Jersey, have invent-ed certain new and useful Improvements in Power-Looms, of which the following is a specification.

This invention relates to looms which run with a free laythat is to say, looms in which the lay is pushed back by suitable mechanism, and then allowed to drop forward of its own gravity for driving up the weft-threads. In looms of this class in ordinary use the lay is pushed back by a double cam keyed to a shaft, one revolution of which will cause the lay to make the movements for two picks, thus allowing one-half the revolution of the cam to a full movement of the lay. \Vhen the lay reaches the end of its forward stroke, it rebounds backward for a certain distance, and its backward stroke is then completed by the cam, which then comes incontaet with its actuating-lever. Unless the motion produced by the cam follows exactly the rebounding motion of the lay, an irregular or jarring motion of the lay is the result. As the periphery of the double cam referred to must be so shaped as to effect two full movements of the lay to one rotation of the cam, the curves of the latter are necessarily abrupt and do not producethe desired harmonious movement of the lay under all circumstances. Variation in the speed of the motive power, and slight changes in any of the working parts, whether caused by atmospheric infiuenees'or by the wearing away of some of the parts, will destroy the harmony of the rebounding and cam motions of the lay, causing the latter to jar and the loom to produce goods of unequal texture. Furthermore, the irregular wabbling motion of the lay thus caused entails much loss of time, as in consequence thereof the shuttle often remains in the shed and knocks the warpthreads out, being thrown against the threads and stopped by frictional contact therewith.

The object of this invention is to secure a regular and determinate motion of the lay throughout its entire swing, whereby the above-mentioned defects will be obviated.

Theinvention consists, principally, in a cam the periphery of which forms approximately an involut-e curve having its outer end slightly bent inward, whereby the movement of the lay in a power-loom may be made to imitate the motion of the lay in a hand-loom.

The invention consists, further, in the combination of a cam of the shape described with the lay and intermediate motion-transmitting mechanism.

The invention consists, further, in the combination of a cam of the shape described, the

lay, and certain specific motion-transmit-ting mechanisms, hereinafter described.

The aecom )Ztll in drawin re )rcsents a vei= tical longitudinal section of a power-loom of ceives its motion from an auxiliary shaft, D,

which carries a cam, D, of peculiar construction, said cam being shown clearly in the drawing, and being made in such a form that the movement which it imparts by intermediate transmitting mechanism to the lay corre sponds as nearly as possible to the movement of the lay in a hand-loom. The periphery of this cam forms approximately an involute curve, the outer end of which is slightly bent inward. The shape of this cam has been the result of practical experience, and is so proportioned as to follow the rebounding action of the lay after it has struck the last pick, and continue the movement of the lay in backward direction, and then gradually diminish the motion of the lay until it arrives at its extreme backward position, at which point the lay is free to suddenly drop again, so as to strike the next pick and place the same in proper position. The auxiliary shaft D of the cam D receives by suitable transmitting gear-wheels a a, twice the speed of the main shaft 0, so as to make two revolutions to one of the main shaft, whereby a full revolution of the cam is ohtained for each movement of the lay. 3y thus employingone entire revolution of the cam for each movement of thelay the cam can be so enlarged and-shaped as to secure a continuous contact, or nearly so, of the cam with the actuating-lever of the lay, whereby the latter is brought back and retained in its rearmost position without a jar, so as to allow the shuttle to pass through the shed without straining, the lay being then dropped by its own gravity. By means of the auxiliary cam described, the loom can be run with a speed of one hundred and fifteen to one hundred and twenty picks per minute, and in such a manner that differences in the speed of the motive power will exert no injurious influence upon'the quality go'terposing of an auxiliary shaft with a cam of of the fabric.

The mechanism-by which motion is transmitted from the cam to the lay consists of an oscillating treadle, I), acted upon by the cam, abell-crank lever, 0, a s n'ing-cushioned. rod, d, connecting said lever and treadle, and a link, j, which latter is connected to a fixed arm, f, of the lay, as shown clearly in the d rawi n g.

To the transmitting mechanism just de scribed, as well as to the other usual accessories of the loom, I lay no separate claim, as the essential feature of this invention is in the inpeculiarconstruction, revolving at twice the speed of the main shaft between the drivingshaft and the motion-transmitting mechanism of the oscillating lay.

Thelay B is provided at both ends with shuttle-boxes, preferably of a, construction whereby the shuttle E,- on entering the box, gradually diminishes its speed and comes finally to a stop without running back.

"What is claimed as the invention is- 1. The cam D, the periphery of which forms, approximately, an involute curve having its outer end slightly bent inward, substantially as described.

2. The combination of a camthe periphery of which forms, approximately, an involute curve having its outer end slightly bent inward, with a lay of a loom and intermediate devices between said cam and lay, substantially as set forth.

3. The combination, with a main shaft, an

auxiliary shaft, and intermediate transmitting mechanism between said shafts, whereby the auxiliary shaft may rotate at twice the speed of the main shaft, ofa cam on said auxiliary shaft, the periphery of said cam forming, ap-

proximately, an involute curve having its outer end slightly bent inward, an oscillating lay, and means for transmitting motion to the lay from the cam, substantially as described.

4. The combination of a main shaft, 0, an auxiliary shaft, 1), intermediate gearing between said shafts, whereby the auxiliary shaft may rotate at twice the speed of the main shaft, aeam, D7, on said auxiliary shaft D, the periphery of said cam forming, approximately, an involute curve having its outer end slightly bent inward, a treadle, I), a .bellcrank lever,

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