US184284A - Improvement in rotary engines - Google Patents

Description

D. n. HARDY.

. l Ro'rARYfENGINE. N.1s4,za4. Patented Nov.14,.1876

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DEXTER D. `OF DELAVAN, ILL., ASSIGNOR `OF ONE-HALF HIS RIGHT TO GEORGE C. WHITMORE AND WILLIAM A. JACOBUS, OF SAME PLACE.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent N o. 184,284, dated November 14, 1876; application led September 18, 1876.

To all whom it may concern v Be it known that I, DEXTER D. HARDY, of Delavan, in the county of Tazewell, and in the State of Illinois, have invented an Improve-` head B removed; and Fig. 2, across-section ,along dotted line a a, a a., Fig. 1. f

This engine is designed for a rotary steammotor, but may also be adapted for use as a pump or blowing-machine, Src.

It consists, first, of a stationary cylinder, with the usual heads and ports, in which the steam is admitted or discharged.

Second, inclosed between the heads of said cylinder is'an annular internal-toothed wheel, i. e., without spokes, of the same diameter as, and revolving against, the interior surface of said cylinder, andl also on its sides against the cylinder-heads. This wheel is provided with two or more lugs or steam-abutments, in the shape of one of the teeth much enlarged, projecting toward the center of the wheel, and which necessarily supplant some of the teeth, placed equidistantly on its interior. By these lugs the wheel is impelled, by means of steam, as hereafter described.

Third, with the teeth of latter wheel is engaged a wheel or pinion of equal thickness with that of said annular wheel, but of much less diameter, and, like the same, extending from head to head, and provided'on its periphery with recesses toreceive and let pass each lug ofthe larger wheel as it comes round. This pinion or wheel is set 0n an axle or shaft, which passes through one or both of the cylinder-heads, from whence the power is applied to the operation of machinery.

Fourth, filling the space not swept over by the lugs of the larger wheel nor the teeth of the pinion, and extending from head to head of the cylinder, is a crescent-shaped block, which contines the steam to its pressure on the lugs of 'said annular Wheel after they pass the forms in which I construct this engine, y

A is the cylinder; B B, the cylinder-heads, one being nearly entirely removed; C, the annular internal-toothed wheel; e e e, steamlugs; AD, the pinion; f, spaces cut out to admit the steam-lugs e of the other wheel; b, the crescent-shapedblock, between the cylinder-heads and the wheels C D; g g, the steam-ports, each having a depression, g g', opening into it, excavated from the inner surface of the cylinder-head, and extending toward the engaged part of the Wheels, used merely to extend the operation of the steam; E, the shaft.

The operation of this engine is as follows: The cylinder is stationary or iixed. Steam, entering one of the ports g, near Where the'wheels become disengaged, acts against one of the lugs-eef wheel C, cach of which lugs has a bearing or contact on the outer curve of the *block b, for about half a .revolution of the wheel C. The two Wheels being engaged by teeth, the pinion D is caused to rot-ate,I the'exhaust steam passing off by the other port when the lug ceases contact with said block b. The lug, continuing its course, passes the pinion D by being admitted within the recess or recesses f of the latter. Steam is preventedfrom passing to the other port by reason of the contact of the teeth of pinion D With ,the inner curve of the block b.

The engine is reversible by making either port the supply-passage for steam, lthe steam,- lugs e always actingv as cut-offs or openers of the ports in either case.

What I claim as my invention is- In combination with the cylinder A and heads B, provided with steam-ports g g, an

tary steam-engine I have hereunto set my hand this 8th day of September, A. D. 1876.

DEXTER D. HARDY. Witnesses:

WM. A. RENNEN, I. H. J. WALSINGHAM.

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