US347104A - Reciprocating steam-engine - Google Patents

Description

. (No ModeL) 2 sheets-' -sheet 1.

' M. GEARY.

' REGIPROOATING STEAM E GINE, No. 347,104. PatentedAug. 10, 1886.

Phfllo-Limographer, Washington,

lllll -5147472 (No Model.) V 2 sheets-sheet 2. M. GEARY;

REGIPROGATING STEAM ENGINE. No. 347,104. Patented Aug. 10, 1886.

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N. PETERS. Pholo-Lilhogmpher. Washington. D. C.

UNITED STATES MICHAEL GEARY, OF OIL CITY, PENNSYLVANIA.

RECIPROCATING STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 347,104, dated August 10, 1886,

Application filed January 26, 1886. Serial No. 189.841. (No model.)

.To all whom it may concern.-

Be it known that I, MICHAEL GEARY, a citizen of the United States, residing at Oil City, in the county of Venangoand State of Pennsylvania, have invented certain new and useful Improvements in Reciprocating Steam Eugines; 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. 1

This invention relates to steam-engines; and it consists in'certain improvements in the construction thereof, as will be hereinafter fully described, and pointed out in the claims.

My invention is illustrated in the accompanying drawings as follows:

Figure 1 is a perspective ,view of my improved steam-engine. Fig. 2is a similar view of the cylinder and connections and a fragment of the bed or frame, taken from the opposite side from that shown in Fig. 1. Fig. 3 is a vertical'longitudinal sectional view of the cylinder and heater-chamber. Fig.4 is a transverse vertical sectional view of the cylinder, steam-chest, and heater-chamber. Fig. 5 is a longitudinal vertical sectional view of the steam-chest.

A marks the frame or bed.

B marks the cylinder.

0 marks the steam-chest.

D marks the exhaust or heater chamber.

S marks the steam-supply pipe.

F marks the exhaust-pipe.

S marks the live-steam passage in the steamchest.

0 marks the valve-chamber.

E marks the exhaust-steam passage in the steam-chest.

c and I) mark the jacket-spaces around the steam-chest and cylinder, respectively.

s marks a live-steam pipe, which connects the pipe S with the jacket-spaces, and s the waste-pipe or exit from said jacketspaces.

P marks the pump.

W marks the feed-water the pump.

W marks the feed-water pipes in the heaterchamber.

Other letters of reference will be referred to in proper connection herein.

pipeleading from The construction is as follows: The cylinder and steam-chest, with the necessary ports and passages, the valve-chamber, and the jacketspaces are formed in one piece of metal at one operation of casting, and this is attached to the frame A so as to overhang. The heaterchamber is arranged below the cylinder and extends into the frame, and is secured to the cylinder by bolts d, which pass through lugs on the side of the heater and into bosses B on the under side of the cylinder. The steamchest consists of a cylinder valve-chamber, O, a live-steam passage, S, an exhauststeam passage, E, and a surrounding jacketspace, c. The cylinder is of ordinary construction, and is provided with a j acket-space, b, which opens into the jacket-space 0 around the steam-chest. These jacket spaces entirely surround the steam-chest and cylinder. A pipe, 8, connects these jacket-spaces with the steam-supply pipe S, and a hand-valve is placed in this pipe 8. A waste-pipe, s, which is always open, leads from these jacket-spaces. Before the engine is started the valve in the pipe 8 is opened, and live steam fills the jacket-spaces and heats up the cylinder and valve-chamber, after which the steam is out off and the engine is started. VI hen the engine is running, the jacket-spaces are filled ,With air, or whatever air will remain therein, and steam is used then only before starting the engine. It is not at all essential that the jacket-space 1) around the cylinder be in connection with the jacket-space c, for it is not'as desirable to heat up the cylinder before starting as it is the valve-chamber.

Piston-valves require to be very closely fitted, and when fitted so there will be no leakage when the chamber is hot they will stick when the chamber is cold.

Heretofore it has been common to jacket the valve-chamber with live steam, and sometimes with exhaust-steam. The first construction is objectionable, and it is wasteful of steam; and the second is objectionable, first, because the exhaust-steam cannot be used to warm up the chamber before starting, and, second, because the exhauststeam is an absorbent of heat and chills the live steam when it enters the valvechamber.

It will be at once observed that my construction is subject to none of the foregoing objections, for before starting the valve-chamber can be perfectly heated, and after starting the live steam in its passage to the valve chamber is perfectly jacketed by a dead-air space, (or, perhaps, it is nearlya vacuum-spaee,) and is not in contact with large radiating surfaces.

It is not essential that the eyliner and steamchest be cast in one piece, for they may be cast separately and bolted together, and therefore I do not wish to belimited to such a construction.

I am aware that it is common to arrange the heater-chamber in the bottom of the frame of the engine; but I am not aware that it has ever before been so arranged in a frame with an overhanging cylinder, and projecting out underneath the cylinder and attached thereto so as to connect with the mouth of the exhaustpassage.

The construction shown is very neat and compact.

\Vhat I claim as new is 1. In a steam-engine, the combination, substantially as set forth, of the cylinder B, steamchest 0, with live-steam passage S, valvechamber 0 parallel with said steam-passage, jacket-spaces c and 1) around said passage S, valve-chamber O, and cylinder B, and the pipe .9 and s, connecting said jacket-spaces with the steam'supply pipe and the open air in a manner substantially as and for the purposes set forth.

2. In a steam-engine, the combination, substantially as set forth, of a main steam-cylinder chamber, a piston-valve chamber parallel with said piston-chamber, a live-steam passage parallel with said valve-chamber, a jacketspace surrounding said Valve-chamber and said live-steam passage, a steam-passage from the steam-so ppl y pipe to the said jacketspaec, a passage to the open air from said jacketspaee, and proper ports or passages for live and exhaust steam.

3. In a steam-engine, the combination, substantially as set forth, of a main steam-cylinder chamber, a piston-valve chamber parallel with said pistonchamber, a live'steam passage parallel with said valve-chamber, a jacketspace surrounding said valvechamber and steam-passage, a steam-passage from the steamsupply pipe to the jacket-space, provided with a shut-off valve, a free passage from said jacket-space to the open air, an exhaust-passage from the middle and under side of the valvechamber to a point below the main steam-cylinder chamber, and a heater-chamber below and parallel with the piston-chamber, connected with the mouth of thesaid exhaust-chamber.

In testimony whereof I affix my signature in presence of two witnesses.

MICHAEL GEARY.

Vitnesses:

.INo. K. HALLooK, Ron'r. H. PORTER.

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