US285892A - Steam-engine governor - Google Patents

Description

Patented 001:. 2, 1883.

WITNESSES:

NITED STATES Fries.

PATENT CHARLES HASKELL, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-ENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 285,892, dated October 2, 1883.

Application filed September 29, 1832. No model.)

To all whom it may concern:

Be it known that I, CHARLES S. HASKELL,

city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Governors for Stea1nEngines,

which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 is a vertical section of the governor embodying my invention, in line at 00, Fig. 2. Fig. 2 is a horizontal section in lineyy, Fig. 1 Fig. 3 is a vertical section in line z 2, Fig. 2.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists of agovernor wherein the pressure of water or other fluid in con nection with the steam-pressure is caused to control the steanrthrottle or cut-off valve,

substantially in the manner hereinafter fully set forth,

Referring to the drawings, A represents the frame of the governor, on one end of which is mounted a wheel, 13, having a cam-groove, a, which receives the stems O of two pumppistons, D, whose barrels are formed by walls in the frame A, said pistons extending parallel with the axis of the cam-wheel B, said axis or shaft having connected with it a spur, band, or other wheel, D, which receives motion from the engine.

At the foot of each barrel of the pump-piston D is mounted a valve, F, above which is another valve, G, the latter opening into a chamber, H, the two chambers H communicating and forming a compression-chamber.

In a cylinder, J, which extends from the head or plug Oto the wall L of the frame A, isa piston, K, which passes through and beyond the chamber H, and is pressed toward thewall L by the spring M, which bears against said piston and the plug 0 at the end of the cylinder J, said piston extending parallel with the pump-pistons D, and having a vertical bore, 2), and a horizontal bore, 0, the latter communicating with the former and with the end of the chamber J adjacent to the wall L, and with a chamber, W, at the neck (I of the piston, said chamber WV being the equalizingcliamber.

In the top wall of the chamber J is an opening or port, N, and on the sides of said chamber are supply-chambers P P, the bottoms of which extend under the seats of the valves F, or are otherwise in communication with said valves. (See Fig. 1.)

Overhanging the port N is the head or plug Q, which is connected with a screw R, the lattcr being properly fitted to the frame A, and serving to adjust the extent which the port N. may be covered and uncovered.

When the piston K is pressed forward by the spring M against the wall L, the space around the neck (I of said piston inclosed with in the walls of the cylinder J forms the chamber W, which serves as apassage for the fluid from the chamber H to and through the port N.

S represents a passage from the pressurechamber H, through which the fluid is al* lowed to pass to the end of the steam-valve stem '1, which can be placed directly under the governor, as shown in Fig. 3 or it can be set in any convenient place, with a connecting pipe leading thereto.

Then the engine begins to move, causing the wheel E to rotate, the .pistons D are operated, the effect of which is to pump the water or fluid from the chamber or tank' P into the compression-chamber H, creating a pressure in said chamber, which communicates its pressure down through the passage S to the top of the steam-valve stem, also causing the fluid to flow out through the port N. Now, if there is more fluid forced into the pressure-chamber H by the pump-pistons D than will flow out at the port N in the same time, the pressure in the chamber H will be increased, which will act directly on the steam-valve stem, moving the valve, and thus shutting off part of the steam, causing the engine to move more slowly until the pistons furnish just as much fluid in a given time as will pass out at the port N in the same time. In order that the flow of fluid through the port N shall be regular and uniform, the pressure must always be the same in the chamber Wand at the port N, to produce which the spring M, in connection with the piston K, inclosedin the cylinder J, is used, and acts in the following manner: When the governor is at rest, there being no pressure in any of the chambers, the spring M causes the end of the piston K to remain at rest against the wall L, which brings the neck (1 of the piston K opposite the throat 00, (see Fig. 3,) making a free passage for the fluid from the chamber Hthrough said throat x and chamber W to and out at the port N to the tank P. As the engine commences to move,

causing the pistons D to operate, thepressure in the chamber H is increased,which pressure is communicated by the liquid outthrough the throat as to the chamber WV through I) and c to the end of cylinder J. When the pressure on the piston K exceeds the resistance of the spring M, the piston K moves forward, cutting off part of the flow of fluid at the throat as, which causes the pressure in' the chamber W to remain always the same, no matter what the pressure may be in the chamber H',which will always be regulated by the steam-pressure.

As the amount of liquid forced in by the pistons D is governed by the speed of the engine,

and the amount of escape is regulated by a steady and uniform flow of the liquid through the port N, it will be seen that any increased speed of the engine will cause an increased pressure in the chamber H and on the steamvalve stem T, forcing it down and shutting off the steam required.

by more or less of the portNis uncovered, and

a greater or less volume of fluid is permitted to pass through said port in a given time.

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

1.- A spring-pressed piston adapted to automatically equalize the outflow of. liquid, in comregulate the outflow of liquid through said.

opening, the piston D, and the throttle-valve operated by excess of liquid, substantially as and for the purpose set forth.

3. A receptacle which supplies the liquid to the forcing-chamber and also receives it therefrom, in combination with pump piston or pistons, and a throttle-valve opened by the pressure of steam when the pressure in the forcing-' chamber is materially reduced, and closed by the pressure of theexcess of liquid over what escapes at the outlet of said chamber, substautially as set forth.

4. The compression-chamber H, in combination with the piston K, the wall L, spring M, the port N, and the passage S, leadingto the steam-valve stem, substantially as and for the purpose set forth.

5. The chamber J, having a port, N, the regulating-piston 'K, and the supply-chambers P, in combination with the adjusting head or plug Q, substantially as and for the purpose set forth.

6.,ZIhe chamber H, chamber J, and passage S, in combination with the piston K, having necks (Z d, and a bore, be, substantially as and for the purpose set forth.

CHARLES S. HASKELL.

\Vitnesses JoHN A. \Vrnnnnsunuu, A. P. GRANT.

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