US57693A - Improvement in devices for transmitting motion - Google Patents

Description

'UNITEDV STATES PATENT Onnrcn THOMAS O. ENTWIS'ILE, OF N EW YORK, N. Y.

IMPROVEMENT IN DEVICES FOR TRANSMITTING MOTION.

Specification forming part of Letters Patent No. 57,693, dated September 4, 1866.

To all whom t may concern:

Be it known that I, THOMAS C. EN'rwIsTLn, of 330 East Fourth street, in the city, county, and State of New York, have invented a new and useful Device for Transmitting Motion; and I do hereby declare that the following is a full, clear, and exact description of the same, reference bein g had to the accompanying drawings,'forming a part of this specification, in whichl Figure 1 is a plan view of my invention as applied to a steering apparatus. Fig. 2 is a longitudinal section of the same.

Similar letters ot' reference indicate corresponding parts in both figures.

'Ihe object of my invention is to obtain a very compact arrangement of gearing for increasing or diminishing the speed of rotary motion; and to this end it consists in a novel combination and arrangement of three bevelgears, two of which have a common axis, and the axis of the third is radial to and revolves around the first-named axis.

To enable others to construct and apply my invention, I will proceed to describe it with referece to the drawings.

A A are two upright standards, such as are commonly used for supporting the wheel shaft of a` steering apparatus. B is a horizontal shaft, supported in the standards in the position commonly occupied by the wheelshaft, and prevented from turning by being keyed or otherwise firmly secured in the standard A. y

rIhe drum H is fitted to turn freely on the shaft B, and the steering-wheel G is secured iirmly to the hollow journal j' of a revolving yoke, F, which is iitted to turn freely on the shaft B, the said journal j' working in a bear ing in the standard A.

G D E are the three bevel-gears. C is fast upon the shaft B, and consequently stationary. D is tted to turn freely on an axle, d, secured to the revolving yoke, and occupying a position perpendicular and radial to the shaft. E is firmly secured to the drum H. D

gears with both E and G.

The three gears are represented of uniform revolutions of the. said gear and drum to one of the wheel G and yoke. This double revolution is produced owing to the gear D being made to operate as a lever of the third order, the fulcrum of which is at the pitch-line of the gear O, the power being applied at d, and the weight at E. rIhe power being equidistant be tween the fulcrum and the weight, the weight moves twice as fast as the power moves.

rIhe same combination and arrangement of gearing may be used for a great Variety of purposes.

It is applicable with especialadvantage, on account of its compactness, to driving screwpropellers at a higher speed than the engine, the yoke F and axle d of the gear D being in such oase attached to the engineshaft, and the gear E being secured on the propellershaft.

In applying the invention to the reduction of speed the power would be applied to the gear E, which, by its rotary motion, would cause .the gear D bothto rotate on its axle d and to creep around the stationary gear O, and thereby give rotary motion to the yoke F and any attached shaft at the rate of half a revolution for every revolution of E.

In this operation the gear D operates as a lever of the second order, the fulcrum of which is at the pitch-line of the gear C, the power being applied at the point of contact of the gear E, and the weight being at d.

The weight, being equidistant between the fulcrum and the power, only moves half as fast as the power.

It must not be understood that the sizes of the three gears are required to be uniform;

rEhe sizes may be varied, and the movement transmitted will be increased or diminished in velocity according to the relative size of the gears O and E.

If the gears O and E are not of uniform size, the axle d will require to be set oblique to the shaft B instead of perpendicular, as represented.

WV hat I claim as my invention, and desire to secure by Letters Patent, is

The combination and arrangement of three bevel-gears, O D E, and a revolving yoke, F, or its equivalent, to operate substantially asherein specified. v

T. C. ENTWISTLE. Vitnesses:

J. W. Goor/ins, A. LE CLERC.

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