US484495A - Sylvania - Google Patents

Description

(NoModeL) 3 SheetsSheet '1.

J. A. GALVIN. OOMPRESSING 0R BLOWING ENGINE.

' .No. 484,495. Patented Oct. 18, 1892.

(No Model.) 3 SheetsSheet 2.

J.. A. GAL'VINI GOMPRESSING' 0R BLOWING ENGINE.

No. 484,495. Patented Oct. 18, 1892.

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UNITED. STATES PATENT OFFICE.

JAMES A. GALVIN, OF STEELTON, ASSIGNOR OF TIVO-THIRDS TO CASPER DULL, OF HARRISBURG, AND JOHN A. WEIMER, OF LEBANON, PENN SYLVANIA.

SPECIFICATION forming part of Letters Patent No. 484,495, dated October 18, 1892.

.A nmn filed April 8. 1892. Serialllo.4218,263- (No model.)

To all whom it may concern:

l 3e it known that I, JAMES A. GALVIN, a citizen of the United States, residing at Steelton, in the county of Dauphin and'State of Pennsylvania, have invented certain new and useful Improvements in Compressing or Blowing Engines; 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 present invention relates to compress- 1ng or blowing engines, and has for its object certain improvements in the construction of valve-operating mechanism for the compressing mechanism hereinafter fully disclosed and claimed, whereby the cams, eccentrics, levers, and connecting-rods heretofore used for the purpose are dispensed with and the valves operated by motors and positive operating devices not liable to excessive wear and tear.

In the accompanying drawings, which form part of this specification, I have illustrated the best forms in WhichI have contemplated embodying my invention.

In the drawings, Figure 1 represents an end View, partly in section, of a compression-cylinder of a blowing-engine with the bonnet of the discharge-valve chest removed. Fig. 2 is a side elevation of the compression-cylinder; Fig. 3, an end view of the same, showing a modification in the Valve-operating mechan-.

ism on a reduced scale; Fig. 4, a side elevation of one end of the cylinder, and Fig. 5 a

similar View of the opposite side of the same end of the cylinder.

Reference being had to the drawings and the letters thereon, A indicates a compression-cylinder for air or gases, and B the head of the cylinder, in which the air ingress and egress ports are formed and are controlled by the air-inlet valve 0 and the air-discharge Valve D,which may be of any approved form of construction, preference, however, being given to the grid-valve and to which either a reciprocating or oscillating motion may be imparted. In the present construction the motion imparted to the valves is reciprocating, and to effect the same there is attached to the rod a of the inlet-valve O a piston 17,

which operates in a cylinder E, supplied with a motor fluid, which may be steam or compressed air, through pipes c d, the former supplying motor fluid for opening the valve and the latter for closing the same, which communicate with a motor-fiuid-supply chamber or chest F, which is controlled by a valve, (not shown,) to which the valve-rod e is attached and operated from the main engine in any approved manner, such as by a lever or an eccentric imparting motion from the piston-rod or from the shaft of the engine. This connection can be readily made by a mechanic skilled in the art to which my invention relates, and therefore requires no further elucidation. The piston 1) moves the valve 0 in both directions to open and close the in gress-ports to the cylinder A. The dischargevalve D is closed by a piston f, attached to the valve by a rod g and supplied with motor fluid by pipe '6, which is an extension of pipe 0, and also communicates with the chamber or chest F and is opened when an equilibrium is established between the pressure of the air in the cylinderAand in the discharge-valve chest G, or in the conduit, (not shown,) which in practice is attached to the flange k on the chest G and leads to a receiver or place of consumption. The opening of the valve D is effected by a spring Z, which surrounds a rod m, also attached to the piston f, and is seated upon a flange n on the cover 0 on one end of the cylinder H, in which the piston f operates, and is confined in position by a head p on the outer end of rod m by nuts q, which apply the requisite tension to the spring Z to move the valve.

The equilibrium, to which reference has been made, is effected by exposing the inner end of piston r in cylinder I to the pressure of the air in the chest Gr through an opening heretofore used forthis tand the opposite end of the piston to the pressure of the air in the compression-cylinder A by a pipe u, which communicates with the cylinders I and A, as shown in Figs. 1, 2, 3, and 4. As the piston of the compressioncylinder moves back from the ingress-ports on its instroke the inlet-valve O is opened by v the piston 12 in the cylinder E, operated by a motor fluid controlled by a valve operated continuously from same moving part of the engine and air admitted to the cylinder, and as the piston of the compression-cylinder advances in its com pression-stroke the instant the pressure in the cylinder equals the pressure in the chest G and the discharge-conduit the piston 1- is balanced, when the resiliency of the spring l draws the valve D across its seat and opens the egress-ports and holds them open until the piston has reached the end of its stroke. Should the spring, from any cause, not act to draw the valve D to open it, the piston 0' will move and eifect the same as soon as the pressure in the'compressiomcylinder exceeds that in the chest Gsufficiently to push the valve across its seat. By this means an efiective fluid-pressure regulator is produced and all strain on the engine obviated, while the power expended by the engine is applied only to accomplish the work for which it was designed, and the cams, eccentrics, toggles, levers, and connecting-rods purpose are dispensed with.

In Figs. 3, 4, and 5 is shown a modified construction of the cylinders or the motors for operating the inlet and discharge valves. In this construction valvechests a. b are provided for the cylinders E and H, respectively,

the valves of which cross the cylinders and are provided with rods 0 d to be connected to the main engine-shaft or the piston-rod in j similar manner as rod e is operated,.andthcreby time the operation of the inlet and discharge valves to coincide with the stroke of the engine.

Having thus fully described my invention, what I claim is- 1. In a compressing or blowing engine, an air-supply valve, in combination with a flnid pressure motor for operating said valve, a separate discharge-valve anda fluid-presence motor attached to said valve to move it in one direction, means independent of the motor for moving said valve in the opposite direction, and motor-fluid-supply pipes eoinmunicating with both motors.

2. In a compressing or blowing engine, an air supply valve, a finidpressure motor for opening and closing said valve, a dischargevalve, and a fluid-pressure motor for closing said valve. in combination with means independent of the motor for opening said valve.

3. In a compressing or blowing engine, a pp yv and. perat ng mechan sm efor, a discharge-valve having a pneumatic pressure-equalizing device attached thereto, and a fiuidpressure motor for closing the valve, in combinationn with a. device separate from the motor for automatically opening the valve.

4. In a compressing or blowing engine, an air-supply va ve and operating mechanism therefor, in combination with a dischargevalve having at one end a cylinder provided with a piston and communicating with the compressed nir chest or condu t a one e and with the compressingrcylinder at the 0pposite en and a flu d-pre s r m o connected to the opposite end o said valve r closing the valve, and a SBPW'M fi iq 1 openi g he va ve- 111a p ssing r bl wing ng ne. a motor-fluid-supp y ambe an a al or controlling thesatnaoperated from the engine, an air-supply valve, a motor ,for operating the same, a discharge-valve, and a motor attached thereto, and both 1110mm communicating with said motocfln-id-snpply chamber, in combination with a pressure-equa i ing d v connected to the discharges-valve and suitable means for op r ing s id di chargea ve in one di ection ndepend nt of it motor.

In a p ssi g or blowi g engine, the wmbination of an air-supply valve, a moto for operating the same and Provided with a motor-fluid-supply valve controlled from the main engine, an ai ischarge a e, a mo for closi g sai valve and provided w a ui r y va e. a o ontr led f em the ma n ngin a fluid-pressure equa zing device attached to the disch rge-v lve, nd a p i e yp a ed dev e for open ng sai 1 discha ge-valve when an eqs ibr um f pressure is established in the discharge conduit and in the ompre sing-cylindern e t m ny whereof .I afiix mysignatu e i presence o t o w tnesse JAMES A. GALVIN.

Witnesses ED- ,Rnmofit, H. B. Ramona.

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