US154929A - Improvement in rotary engines - Google Patents

Description

3 Sheets--Sheet I.

T. E.- STUART. Rotary-Engines.

10,154,929; Patented Sep t.8,1874.

WITNESSES j I INVENYTOR w y mt Pi M Attorneys 3Sheevts--Shegt2. T. E. STUART.

. Rotary-Engines. N0,l5 4,929. V v Patented Sept.8,1874.

WITNESS ES I INVZTBTOW Y 4 M V Attorneys UNITED STATES PATENT omct.

TIMOTHY E. STUART, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 154,929, dated September 8, 1874;" application filed August 12, 1874.

To all whom it may concern:

Be it known that I, TIMOTHY E. STUART, of Boston, in the county of Suffolk and in the State of Massachusetts, have invented certain new and useful Improvements in Rotary En-v gines; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangement of a rotary engine, as will be hereinafter more fully set forth. 1-

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawings, in which- Figure 1 is a side elevation of my rotary engine, the journal-box being in longitudinal section. Fig. 2 is a longitudinal vertical section of the same through the line av as, Fig. 1. Fig. 3 is a transverse vertical section through the line y 3 Fig. 2. Fig.4 is a perspective view of a packing-ring used in the engine.

A represents a base of any suitable construction, in which is secured the circular casing B. Through the center of this casing passes a shaft, 0, which is supported on each side of the casing in a journal-box, D. Each box rests in a stand, E, and is adjusted laterally therein by means of set-screws b 1), upon which are jam-nuts a a, to set the screws and hold them as desired. The stand E is adjustable up and down on vertical bolts 01 d, rising from the base A, and nuts 6 e, screwed on the upper ends of said bolts to hold the stand down when adjusted. The stand is adjusted by means of set-screws h h, passing through the stand and bearing against the base. On the screws h h are jam-nuts i t, as shown-in Fig. 1.

By the up-and-down adjustment of the stands E, and the lateral adjustment-of the boxes D, the shaft 0 with its piston may be adjusted as desired, to compensate for any Wear of the parts.

On the center shaft 0, within the casing B, are secured two eccentric pistons, G G, constructed in the form shown in Fig. 3, and set in opposite directions. These pistons work in separate channels B B in the casing B, said channels being formed by means of a central annular partition, B in the same. The point of each piston which comes in contact with the inner circumference of the casing is provided with a cross-bar, f, of flint, pressed outward by means of springs or. In both sides of each piston are inserted rings made of flint or equivalent hard substance, m m, which rub against metal rings at n in the heads of the casing and in the partition B These metal rings are constructed as shown in Fig. 4, the

ends overlapping each other, and springs y are arranged to press the rings against the pistons, and also to spread them as much as possible in the annular grooves in which they are inserted. H represents the steam-chest,

divided by a partition in two chambers, in

each of which is a valve, I. Thesevalves are constructed as shown in Fig.3, and turn in semicircular seats 2. The head of the valve extends through an aperture into the chamber B, and rests on the piston G, the end of thevalve being lined with flint to prevent wear. The head of the valve is provided with a passage, 0, to correspond with the steam-entrance J. Each valve is pressed down by means of a spring, 8, of any suitable construction; but, in place of such springs, the

steam may be made to pass over the valves and hold them down. Back of the point f in each piston is a recess, t, to form the abut ment against which the steam is to work. K is the exhaust, and o 'u are drain-cocks in the bottom of each channel in the casing.

The steam, entering into one of the compartments of the steam-chest H, passes through the passage 1) of its valve I into the corresponding channel B and strikes against the abutment h of that piston, forcing the same around until the swell to on said piston lifts the valve far enough to shut off the'steam, whenit commences to exhaust. The pistons being set in opposite directions, the steam will be let into one channel at the same time as it is shut off from the other.

Having thus fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

tons G, with L-shaped abutments tand crossbar f, steam-chest H, valves I, with passages 10, and springs s, all substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 12th day of August, 1874.

TIMOTHY E. STUART.

Witnesses:

H. A. HALL, J. M. MASON.

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