US289958A - Alexander l - Google Patents

Description

(No Model.) 1 v A.- L. BEVANS.

MOTOR FOR SEWING MACHINES, @50- NO. 289,958.

Patented Dee.;11,v1883.

N. PETERS, Phomuln h mn washingwfl, 9.6.

UNITED STATES PATENT Denice; f

ALEXANDER L. BEVANS', OFFLUSHING, .NEWV YORK.

MOTOR FOR SEWING-MACHINES, 86C.

SPEJIFICATION forming partof Letters Patent No. 289,958, dated Dece'mbcr 11, 1883. Application filed October 11 1S82. (No model.)

To all whom, it may concern.-

Beit known that I, ALEXANDER L. BEVANS, of Flushing, in the county of Queens and State of New York, have invented an Improvement in Motors for Sewing-Machines and other Machinery, of which the following is a specification.

In motors heretofore employed the force of the water has acted by pressure or gravity upon the wheel,whioh is a small water-wheel,

and little or no use has been made of the velocity and impact of the water. In many places a sufficient head of water exists to cause a jet of water to issue with considerable velocity. I make use of a small jet of water issuing with the rapidity due to its hydrostatic pressure, and instead of using such water to fill buckets, or to drive the wheel bypressure or weight of water, I cause such jet of water to act upon the open curved fans of the wheel by the impact due to its momentum. I con struct the fans of the wheel with reference to receiving the blow or impact from the issuing jet of water, and I proportion the jet and the.

wheel to the power required in'sucha manner that the fans of the wheel will revolve with the same or nearly the same speed as the issuing jet of water. This insures a continua-' tion of the movement of the jet of water, and the fans of the wheel revolve in and with such jet in a manner similar to a pinion revolved by a rectilinear moving rack. By this arrangementI am able to obtain great speed and to reduce the same by a small pulleydriving a larger one on the sewing-machine. so as to obtain the necessary power. water on the fans of the wheels, being the re-. sult .of momentum and weight, exerts the greatest force on the wheel, because where the momentum is stopped the water becomes inert and forms a clog on the wheel to prevent it rotating; hence with the water-motors heretofore in use the buckets, remaining full of water on one side, prevent the wheel turning faster than gravity will move the water, and the impact is substantially lost. WVith my wheel the buckets do not'hold the water, and the surface-of the wheel only has upon it a thin film of water, the water being thrown off by the centrifugal action and continuing on with the jet. In cases where only a few buckets have The impact of the] been employed upon arms for the waterto act against, considerable'loss of energyoccurs .from the jet not acting continuouslyon the wheel. It is wellknown that the force of a Gifford injector is lost if the column of water becomes divided andbroken up 5 so in my improvement I maintain the solidity and density of the jet as much as possible, in order to obtain its maximum effect.

In the drawings, Figure l is a sectionat The fans ct a are, for convenience, contained between the two rings 1), and c, and it is pref erable to cast the fans a upon the ring b in one :piece with the arms d and hub e, and'to bolt on the-ring c by the bolts 0. Each fan is made as a portion of a cycloidal curve, so that its face is at right angles, or nearly so, to the jet of water k, and as the wheel rotates the fan will draw away'from the jet of water, but still the surface will be nearly at right angles to the line of the jet. The shaft 1 is supported in suitable bearings. It is revolved by the said motor-wheel, and Iremark that the jet of wateris supplied by a pipe and suitable nozzle, m.

If desired, the motor might be used without any case, as it is desirable to allow the jet to other side. There are suitable bearings for the shaft Z on the sides a and p, and the platep is secured in place by the screws r. The joint is made watertight by packing. This case is 'sufficiently large not to obstruct the free passage of the jet, and the water is delivered at the hopper-shaped bottom part c of the case to a sewer pipe or drain.

I prefer to place upon the shaft 1 the loose pulley s, and to apply to the same a springfrictional driving-pressure. I have represented the elliptical spring t as fastened to and revolving with the shaft and its outer ends as pressing against the pulley s, so as to give motion to the same and to the sewing-machine IOO through the belt a. If the sewing-machine is stopped, the motor may be started, and the friction of the spring or the pulley will cause the latter to rotate and gradually start the sewing-machine.

By this improvement I am able to regulate the speed of the sewing-machine by a brake, or to stop the same entirely without stopping the motor, because the shaft of the motor will continue to revolve within the loose pulley, the frictional spring sliding on the pulley; hence the sewing-machineis rotated at a speed proportioned to the friction applied to its brake, and there is no loss of time in starting the machine, because the motor is constantly running.

I am aware that an open wheel with buckets has been employed with an internal acting jet, and that external jetshave been used with buckets that are placed outside the rim of the I wheel, and thatahollow ortrough-shaped rim has been used with curved buckets within it. In my motor the wheel is open, being formed 2 of two rings, with the curved fans between them, and the jet occupies a tangential position to the center of the fans, and the fans are l curved, so as to be at right angles to the jetboth as they enterand as theyleave the straight jet of liquid. I claim-- I 1. An open motor-wheel composed of the l rings 1) c,with cycloidal curved fans a between 1 them, in combination with a case surrounding i the wheel, and having a free passage between it and the wheel for the water, and ajettube l passing through the outer part of the case and being in the line of a tangent to the wheel. substantially as specified, whereby the wheel is caused to revolve at nearly the same speed as the issuing jet of water, as set forth.

2. The combination, in a motor, of a nozzle for an issuingjet of water, an openwheel with curved fans, a case surrounding the wheelshaft Z, a loose pulley, and a frictional connection to the shaft, substantially as set forth.

3. An open motor-wheel composed of the cycloidal curved fans a around the periphery of said wheel, in combination with a case surrounding the wheel, and having a free passage betweenit and the wheel for the water, and a jet-tube passing through the outer part of the case and being in the line of a tangent to the wheel, substantially as specified, whereby the wheel is caused to revolve at nearly the same speed as the issuing jet of water, as set forth.

4. I11 combination with an open wheel having cycloidal curved fans, a nozzle for an issuing jet of water, a shaft for the wheel, and a frictional connection,substantially as set forth, whereby the motor may be allowed to run at a nearly uniform speed, and the speed of the sewing-machine or other mechanism may be varied, substantially as set forth.

Signed by me this 9th day ot'October, A. D.

A LEXQXXDER- L. BEVANS.

Witnesses:

GEO. T. PINCKXEY, \VILLIAM G. 7 Mom.

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