US232158A - Steam and air engine - Google Patents

Description

A. WATERHOUSE 85 B. B. BREWER.

Steam and Air Engine.

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TTnn STATES PATENT ADDISON G. IVATERHOUSE AND BENJAMIN B. BRE\VER, ()F SACRAMENTO,

' CALIFORNIA.

STEAM AND AIR ENGINE.

SPECIFICATION forming part of Letters Patent No. 232,158, dated September 14, 1880,

Application filed October 8, 1879.

To all whom it may concern Be it known that we, ADDISON Gr. VVATER- HOUSE and BENJAMIN B. BREWER, both of the city of Sacramento, State of California,

have invented a new and useful Improvement in Steam and Air Engines, of which the following is a specification.

The invention primarily relates to singleactingen gines, or thatclass of engines in which steam is admitted only on one side of the piston; and it consists in the general construction of the engine in combination with the form of constructing the valve and the method of connectin g the same to the engine, together with 1 the manner of working the valve.

In the accompanying drawings, Figure 1 shows a sectional elevation of an engine and valve embodying our invention. Fig. 2 is a side elevation of the same. Fig. 3 is a rear elevation. Fig. 4 is a detail of the valve and chamber.

Fig. 1 shows a sectional elevation of the engine and valve, in which m is the crank; a, the connecting'rod; S, the piston, made long and 2 5 cup-like, so as to present a large surface for wear and to guide it in the cylinder 0. The lower part of the piston is provided with annular grooves for packing, and the rod a is hung to the piston by the pin i. The valve 0 H is provided with two portsthe steam-port O and the exhaust-port b--the steam entering into the valve-chamber through the pipe d. The valve '0 is of the form known as rolling valve. The steam enters and presses on the 3 5 top of the valve, and by its oscillation the steam is alternately let in the cylinder 0 and out through the exhaust-port I). The working of the valve will be described hereinafter.

Fig. 2 is a side elevation of the engine, show 40 ing the crank m, rod a, cylinder 0, and valve H, also the eccentric E, which works the pumprod f, the pump P being used as a feed-pump for the boiler. In this case we attach to the rod 1" a sleeve, h, which moves with the rod,

5 and connected to said sleeve h is the valverod 70, which connects to the arm 0, and gives the oscillating movement to the valve. In the valve-chamber H the rod i" is connected to the eccentric E at a point, 0, close to said eccentric, and the rod is guided by the bearing 9,

which allows its longitudinal motion and prevents any side play.

The advantage of having the connection 0 close to the eccentric E is shown by reference to Fig.3, which is arear elevationofthe engine, showing the pump P, pump-rod f, guide-bearing g, connection 0, and eccentric E, which causes an even reciprocation to the rod fthat is, while the eccentric is turning its upper center it causes the rod f to move com-'60 paratively slowly, and while the eccentric is turning on its lower center or close to the bearin g y, it passes the center quickly, causing a comparatively quick motion on the rod 011 passing its lower center. This inequality to 65. the motion of the rod and eccentric we use to ad vantage, as follows: by eonnectin g the valverod 7:, which oscillates the arm 0 and valve within the chamber H, to the pump-rodfat h by a collar or hearing; or, if desired, the rod is can be connected directly to the eccentric E. In either case the uneven motion of E will be imparted to the arm 0 and valve, so at the quick end of the stroke the steam-port will be opened and closed quickly, so as to shut off the steam while the engine is making but a small part of its stroke, thus usingthe steam expansively, while at the slow end of the stroke the exhaust is opened and moves slowly in order to give plenty of time for the exhaust- 8o steam to escape.

By reference to Fig. 1 it will be seen that the valve-chamber H is made separate, and is screwed into the cylinder O by having the outer part of the steam-port G threaded and 8 5 tightly screwed into C, as shown; or, if desired, the chamber H can be flan ged an dbolted to the engine-cylinder.

By reference to Fig. 4 will be seen a sectional view of the valve-chamber H, valve o, rocking arm a, steam-pipe (1, steam-port G, and exhaust-port b. The valve 12 has steampressure on top of it that enters through the pipe cl, and the valve is worked by the oscillation of the flattened arm a, so that as the valve is at one end of the stroke,.as shown in cross-lines, the exhaust-steam is free to pass out from port 0, and down through the ex haust-port I), and while the valve is at the other end of the stroke, as shown in dotted roe lines, the steam passes through the chamber H and the port 0 into the cylinder 0, as shown in Fig. 1, while at the same time the exhaust-port bis closed. The arm n, that works the valve, is made flat where the valve is fixed to it, and made round where it extends out of the chamber H and is connected to the arm or lever 0.

What we claim as our invention is 1. The separatelyconstrueted two ported valve H, provided with exhaust-pipe b, steampipe (1, and boss 0, by which the valve is screwed to or connected to the engine, and through which passes the steam communication between the valve and the engine, in combination with a single-acting engine, all construeted substantially as and for the purposes Set forth.

2. The combination of the eccentric E, short connection 0, guide-bearing g, pump-rod f and pump P with the rod 7c, arm 0, separate valvechamber H. and sin g'le-acti ng engine 0, all arranged substantially as and for the purposes set forth.

ADDISON G. WATERHOUSE. BENJAMIN B. BREWER.

Witnesses: 7

BARTON B. WARD, ELIsoN V. BUCKLEY.

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