US245777A - Steam pumping-engine - Google Patents

Steam pumping-engine Download PDF

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US245777A
US245777A US245777DA US245777A US 245777 A US245777 A US 245777A US 245777D A US245777D A US 245777DA US 245777 A US245777 A US 245777A
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steam
cylinder
piston
chest
head
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/02Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
    • F01L25/04Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
    • F01L25/06Arrangements with main and auxiliary valves, at least one of them being fluid-driven

Description

(No Model.)

B. 'BRAZELLE.

STEAM PUMPING ENGINE.

No. 245,777. Patented Aug. 16,1881.

2 new. i 2 nae.

WITNESSES: i I

k @M 7 w m N. PETERS. Pmwulhe n hu. Washingion. D. c. 7

UNITED STATES PATENT OFFICE.

BENJAMIN BRAZELLE, OF ST. LOUIS, MISSOURI.

STEAM PUMPING-ENGINE.

SPECIFICATION forming part of LettersPatent No. 245,777, dated August 16, 1881.

Application filed May 7, 1881. (No model.)

To all crhom it may concern:

Be it known that I, BENJAMIN BRAZELLE, of St. Louis, in the county of St. Louis and State of Missouri, have invented certain new and useful Improvements in Steam-Engines, of which improvements the following is a specification.

The object of my invention is to provide a simple, compact, and inexpensive direct-acting engine adapted for application to pumping water, feeding boilers, compressing air, operating steam hammers or stamps, rock-drills, and analogous uses, and specially suited for operation under high pressures and at high speeds; to which end my improvements consist in a certain novel construction and combination of a steam-cylinder and differential piston and a steam-chest and steam-operated valve, as hereinafter more fully set forth.

In the accompanying drawings, Figures 1 and 2 are vertical longitudinal central sections through a direct-acting steam pum pin g-en gine embodying my improvements, the pistons being shown at the upper and lower extremities of theirstroke, respectively; and Fig. 3, a transverse section through the same at the line 00 00 of Fig. 2.

To carryout my invention I provideasteamcylinder, A, which is bored out truly to receive a differential piston, B, consisting of two cylindrical heads, I) b, of larger and smaller diameters, respectively, united by a central stem, each head fitting accurately and moving in a portion of the cylinder of corresponding diameter. A steam-chest, G, is formed upon or secured to the cylinder A, and is provided with a difl'erential piston-valve, 0, consisting of a smaller cylindrical piston-head, c, and a larger head, 0, united by a stem, and fitting respectively in correspondingly-bored portions of the steam-chest, the smaller piston, 0, being so located as to alternately establish communication through a port, 0 between the space in the cylinder A above the larger area of the head b of the main piston and the steam-pipe G which communicates with the steam-chest above the head a and between said space and the exhaust-pipe G which is connected to the steam-chest at a point between the heads 0 and 0 of the valve. The smaller bore of the cylinder and the larger bore of the steam-chest are connected by a port, 0?, opening into the steamchest below the larger head, 0, and the larger bore of the cylinder and smaller bore of the steam-chest by the port 0 before referred to. A port, 0%, extends from the steam-chest above the smaller head, 0, to a point in the cylinder at or adjacent to the inner end of its larger bore, said port being continuously open to the steampipe 0 and consequently supplying live steam to the space in the cylinder between the heads I) and Z) of the piston uninterruptedly during the operation of the engine. A port with which a supplemental exhaust-pipe, 0 is connected is -formed in the cylinder A at or adjacent to the outer end of its smaller bore, and the outer end of its larger bore is closed, as is the adjacent end of the steam-chest, by a head, A. The opposite end of the steam-chest is fitted with a removable bonnet, 0 to admit of the insertion and removal of the valve, and a transverse partition or seat, 0 is formed in the valvechest to act as a stop for the valve on its upward traverse, said partition having a central opening fitting a collar, 0 on the valve-stem. In the instance shown the cylinder A and piston B are each prolonged, so as to form respectively a pump-barrel, A, provided with suitable connections, 1) b to suction and delivery valves, and a pump-plunger, B, working with suitable clearance in said barrel; but it will be obvious that in lieu thereof an ordinary piston-rod,provided with connections suitable for any special duty to which the engine is designed, may be provided and actuated by the means hereinbefore described.

In the operation of my improvements, the piston B being at the upper and the valve G at the lower extremity of its stroke, as in Fig. 1, the steam from the boiler, which is admitted to the steam-chest by the steam-pipe 0 passes therefrom through the port 0 into the cylinder above the larger head, I), of the piston B, and also passes through the port 0 to the space between the heads 12 and b, acting thereby upon both sides of the head I), but with an excess of downward pressure due to the difference in area between its upper and lower surfaces, such preponderance of pressure effectin g the downward stroke. At the termination thereof, the smaller head, b, of the piston having passed the lower port, 0 the steam supplied through the port 0 to the space between the heads passes therefrom through the port 0 to the steam-chest and raises the valve 0 by its pressure upon thelarger head, 0, simul taneously opening the upper port, 0 to the exhaust, for the discharge of the steam which has effected the downward stroke, and effectin g the upward stroke by its pressure upon the lower surface of the larger head, I). At the termination of the upward stroke, communication being established between the lower port, 0 and thesupplemental exhaust-pipe 0 ,the steam which has raised the valve 0 escapes through the pipe 0 and the pressure upon the upper head, 0, throws down the valve, thereby opening the port 0 to the steam-pipe and effecting the succeeding downward stroke,-as above described. The provision of the collar 0 above the lower head, 0, of the valve effects the cushapparatus, and the absence of joints and reduction in the number of wearing-surfaces is of special advantage in its application to use under high pressure and at high speed.

I claim as my invention and desire to secure by Letters Patent 1. In a steam-engine, the combination, substantially as set forth, of a steam-cylinder, a differential piston fitting therein, and a differential-piston distribution-valve.

the application respectively of steam-pressure to the smaller head directly from the steampipe and to the larger intermedially through the cylinder.

3. In a steam-engine, the combination, substantially as set forth, of a steam-cylinder bored to two different diameters for different portions of its length, a difierential piston formed of two heads of diameters corresponding respectively to those of the cylinder, and connected by a stem, and a reciprocatingvalve, by which a preponderance of steamrpressure is alternately applied to the outer and the inner faces of the larger piston-head.

4. In a steam-engine, the combination, substantially as set forth, of a steam-cylinder and asteam-chest, each bored to two different diameters for diiferent portions of its length, a differen tial piston and a differential-piston valve, fitted respectively to the cylinder and to the steam-chest, a steam-supply and a steamer:- haust opening, each communicating with the steamchest, two ports, which respectively connect the larger bore of the cylinder with the smaller bore ofthe steam-chest, and vice versa, aport connecting the steam supply opening with the larger bore of the cylinder at the end opposite that at which the port leading to the steam-chest is located, and a supplemental exhaust-port located in'the smaller bore of the cylinder.

B. BRAZELLE.

Witnesses:

J. SNowDEN BELL, CHAS. A. SAFFORD.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682257A (en) * 1952-07-07 1954-06-29 Nat Supply Co Fluid operated engine for downwell pumps
US2723649A (en) * 1953-09-14 1955-11-15 North American Aviation Inc Shuttle device
US4068983A (en) * 1975-07-28 1978-01-17 Charles S. Madan & Company Limited Piston pumps driven by fluid-actuated piston having a constant fluid force against the small area surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682257A (en) * 1952-07-07 1954-06-29 Nat Supply Co Fluid operated engine for downwell pumps
US2723649A (en) * 1953-09-14 1955-11-15 North American Aviation Inc Shuttle device
US4068983A (en) * 1975-07-28 1978-01-17 Charles S. Madan & Company Limited Piston pumps driven by fluid-actuated piston having a constant fluid force against the small area surface

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