US466799A

US466799A - Steam-engine

Info

Publication number: US466799A
Authority: US
Publication date: 1892-01-12
Anticipated expiration: 1909-01-12

Description

No. 466,799. Patented Jan. 12, 18921.

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J. M. POWELL.

STEAM ENGINE.

No. 496,799. Patented Jan. 12, 1892.

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JOSEPH M. IOVELI., OF SPRINGFIELD, MISSOURI.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 466,799, dated January 12, 1892.

Application filed September 7, 1891. Serial No. 405,037. (No model.)

To @ZZ whom it may concern:

Be it known that I, JOSEPH M. POWELL, a citizen of the United States, residing at Springiield, in the county ot' Greenel and State of Missouri, have invented certain new and useful Improvements in Automatic SteamEn 4 gines; and I do hereby declare the following` to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention consists Vof improvements in automatic steam-engines, the object of which is to provide a cheap, simple, and durable steam-chest cut-off and valve. These objects I attain by means of the device hereinafter particularly described and claimed, and illustrated in the accompanying drawings, forming a part of this specitication, in which- Figure l is a view in elevation of the entire device. Fig. 2 is a vertical longitudinal section of the cylinder and steam-chests. Fig. 3 is the bonnet or cap on the end of the steamchest. Fig. 4: is a view of the sides of the steam-chest and exhaust-valve seat. Fig. 5 is a view of the plate which forms the cylinder-head, showing the ports into the end of the cylinder` with the valves, also the openings for the steam to enter the steam-chest. Fig. G is a detailed view,enlarged,to show the mechanism for operating the valves.

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

A is an ordinary cylinder.

B B are the steam-passages.

C are the steam-chests on the ends of the cylinder. The steam-chests are formed ofthe bonnet or cap D, the cylinder-head F, and thepiece E, which forms the sides of the steamchest and has a dividing-partition E2. Said partition divides the steam from the exhaust. In the exhaust part of the chest avalve-seat is formed with a plate X, having a projecting ridge or rim X2, and a port K3, corresponding with the port in the cylinder-head. Thus the exhaust-valve G works between two ports K2 and K3 to lessen the amount of clearancespace, so that the clearance-space of both the supply-valve I-I and exhaust-valve G is only the thickness of the cylinder-head. Valve H for the supply has a balance-valve I, having `by adjusting the valve-seat I2.

a seat I2 to lessen the friction ot the valve H. Said balance-valve consists of two plates-an inner plate I2, forming the seat for the valve II, and the outer plate I3. Said plates are connected by stud-bolts I4 for holding the plates in any given position relative to each other, passing through the bonnetplate D, and plate I3 is provided with an adj Listing-screw I5 for raising and lowering the plate I3, there- This I accomplish by means of screw-threads in the bonnet D, and on the end of vthe adjustable screw I5 the other end of the said screw has shoulders or projections I( on each side of the plate I3, thus forming a swivel, so that the plate I3 will have to rise or fall as the screw I5 is turned.

The ports to the supply K and exhaust K2 are made long, and preferably with sides formed in the shape of an arc of a circle, or nearly crescent shape, and connect with elongated steam passage-ways .B B2. The valves I-l and G are made curved to lit and slide back and forth over the ports, and for this purpose are provided with self-packin g fulcrums L, which move back and forth. Forthis purpose the side piece E is provided with openings E3 to receive the fulcru ms L and. slots E4 E5 to permit the valve-stems to work back and forth.

The end of the cylinder through which the piston-rods pass is provided 'with a steamchest which has a collar M, which may be made in two or more pieces, so that it maybe removed to get at the valves without removing any other machinery.

The valves H and G are operated automatically thus: By means of an ordinary eccentric-rod on the main shaft I connect with the wrist N on the Working beam or lever O. Said lever O is connected by means of an adjustable valve-rod P, having pivoted or swivel connections with the lower or exhaust valve stem S2, so as to move smoothly back and forth. The valve-stem lflgof the supply-valve is connected with a dashpot or other suitable device for closing the valve, the said valve being opened bythe upper or back stroke of the lever O. The valve would be closed by the lever O moving in the opposite direction, provided it were not sooner tripped. I trip it in IOO any suitable Way by connection with the governor, which is so adjusted as to cut ott the supply when the desired speed is reached at each stroke of the piston. This I accomplish by providing a bolt Q in the end of the lever O, Which is provided with a shoulder Q2 and a spring Q3 for holding the bolt forward and is hinged to a trip-lever R, said lever having a beveled end R2, against which a spiral piece S Operates to push the end of the lever R and push back the bolt Q, thus tripping the valve H. Bolt Q is placed in a slot in the lever Q and inclosed by a suitable plate T, which is riveted or bolted in place. The spiral piece S is placed upon a rocking shaft W, which is operated by an arm W2, attached to a lift-rod orspindle of the governor. The rocking shaft W has suitable bearings connected to the cylinder or steam-chests.

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

1. A steam-chest on each end ot' a cylinder,

v formed of bonnet D, cylinder-head F, and

sides E, the chests being divided and provided with curved elongated ports K K2, combined with curved slide-valves G and II, substantially as shown and described.

2. In an engine, the combination of a selfpacking fulcrum L on a slide-valve secured to the end of the cylinder and a balance-valve I with steam-chest C on the ends of the cylinder, substantially as shown and described.

In an engine, the exhaust-valve chest on -the end of the cylinder, in combination with a curved slide-valve having a self-packing fulcrum, a seat-piece X, having a port X2 to correspond with the port K2, and a chest C on the end of the cylinder, having a partition E2 and a steam-passage B2, all substantially as shown and described.

4. A supply-valve for a cylinder, consisting of -a curved valve H, having a self-packing fulcrum for sliding over a curved port inthe end of the cylinder, combined With a cylinder A, and a steam-chest C, and a balancevalve I, all substantially as shown and described.

5. The combination of a sliding valve H, having a self-packing fulcrum and a steamcheston the end of a cylinder, Wit-h a balancevalve consisting of two plates I2 I2, stud-bolts I4, and an adjustable screw I5, having shoulders I6, all substantially as and for the purpose specified.

G. In combination With sliding valves having self-packing fulcruins, the mechanism for operating them, consisting of an eccentric-rod for operating a Working lever 0, Which is attached to the valve-stem of the exhaust-valve G and opens the supply-valve by means Ot' a sliding bolt Q and closes the supply-valve by a dash-pot tripped by a spiral piece S, operating on a pivoted lever R, all substantially as shown and described. 7. A device for tripping the supply-valve, consisting of a bolt Q, having a spring Q3 and lever R, and a spiral piece S, attached to a rocking shaft W, which is connected to the governor ofthe engine, combined with a lever O, having a slot and a plate T, all substantially as and for the purpose specified.

In testimony whereof Iafiix my signature in presence of two witnesses.

JOSEPH INI. POWELL.

Witnesses:

S. A. HASELTLNE, B. L. FERRIS.