US255222A - Air-compressor - Google Patents

Description

(No Model.) W. WAN G.

AIRUOMPRESSOR,

No. 255,222 Patented Mar. 21,1882,

WITNESSES:

Y E N R 0 w A N. PETERS Pbow-Lflho' m her. Washington. 0.6.

UNITED STATES PATENT OFFICE.

WILLIAM WANG, OF PHILADELPHIA, PENNSYLVANIA.

AIR-COMPRESSOR.

SPECIFICATION formingpart of Letters Patent No. 255,222, dated March 21 1882.

Application filed January 7,1882. (No model.)

T 0 all whom it may concern:

Be it known that I, WILLIAM WANG, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Air-Oompressors,which improvementis fully set forth in the following specification and accompanying d,rawings,in which Figure 1 is a partial side elevation and longitudinal vertical section of the air-compressor embodying my invention. Fig. 2 is a transverse section thereof in line 00 0:, Fig.1. Fig. 3 is a top view of the central portion of the interior thereof. Fig.4is a longitudinal section in line 3 12 Fig. 3. Fig. 5 is a transverse section in line 2 2, Fig. 4.

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

My invention consists in improvements in automatically-acting air-compressors, as will be hereinafter fully set forth.

Referring to the drawings, A represents a horizontally-arranged valve-chamber; and B Brepresent horizontally-arranged cylinders, which 'are connected to the ends of the chamber A, the latter being properly supported on a base or stand, 0.

D represents a piston-rod, which is passed through the'plates or caps E, which separate the chamber A from the cylinders B B, the ends ofthe rod in the cylinders B B carrying pistons F F. On the piston-rod, within the the chamberA,is looselyfitted a balanced piston,G,Which moves in cylinders G, which are cast with the plates or caps E and project horizontally toward each other, as shown in Fig.1.

H represents a slide-valve,which is fitted to the neck of the balanced piston G, and its seat H is at the base of the chamber A, the seat having ports a, which lead to openings 1) in the caps E,said openings communicating with the cylinders B B and an exhaust-port, I), opening outwardly. The piston G is hollow, the inner wallsof the ends being threaded, so that packing a maybe screwed into said ends, the rod 1) passing through thecenter ofthe packing, by which provision water is prevented from passing from one cylinder G through the piston to the opposite cylinder G.

Cast with each cylinder G is a valve chamber, J, within which is a plunger-valve, K, the

two plunger-valves being coupled bya link,d. (See Figs. 3'and 4.) an exhaust-port, c, which communicates with a port, 6, in the cylinder G, (shown full in the left-hand side of chamber A, Fig. 1, and dotted in Figs. 2 and 4,) said port 6 also communicating with a port,f, formed in the cap E, said port f communicating with a port, f, which is formed in the seatof thevalve Hand leads to the exhaust-port b of the apparatus. (See Fig. 2.) The outer ends of the plungervalves project into the cylinders B and B, and said ends are formed with grooves or necks f so located that when the valves are moved to their full stroke the spaces of the grooves are in communication with the ports c.

I At the outer ends or heads of the cylinders B B are air-receiving valves L, which open M, which connects the two pipes M.

In the cap to which the couplinggis screwed is a. spring-pressed valve, h, said valve closing inwardly, the object of which is that when the compressed air leaves the cylinder B or B it opens said valve and passes into the feedpipe M, and when the piston which has justforced out the air recedes the back pressure of compressed air in the pipe M and the spring g coses the valve h and holds it on its seat.

The chamber A is supplied with water by means of the pipe N, which communicates with an inlet, it, formed in the bottom of the wall of the chamber A, said chamber being thereby filled throughout with water.

The pistons F are shown moved to the right, and the exhaust-port b is in communication with the right-hand cylinder B, the water in said cylinder thus exhausting or being discharged, the balanced piston G being also to the right, and the left-hand piston having In each plunger-valve is- IOC moved the plunger-valve likewise to the right, the left-hand port a being in communication with the chamber A. Water in the chamber A now flows through the left-hand port, and reaches the left-hand cylinder and acts on said cylinder so as to move it to theleft. The air in the left-hand cylinder in front of the piston is forced out into the pipe M, and meanwhile the valve L of the right-hand cylinder opens and replenishes the latter cylinder with air. hen the pistons F have made their full stroke the right-hand piston F strikes the right-hand plunger-valve K and moves it to the left. This brings the groove or neckf, which was covered by the cap E, into position directly aside of the opening port 0 of the right-hand cylinder G, whereby water enters said cylinder from the chamber A, and thus moves the balance-piston G to the left, and also shifts the valve H to the left. Thiscloses the left-hand port and opens the exhaust, so

that the latter is in communication with the left-hand cylinder A, whereby the water in said cylinder may exhaust, and the right-hand port a is uncovered, so as again to supply the right hand cylinder; but the water in the right-hand cylinder G, that has shifted the balance piston, requires to be discharged. Now, as soon as the pistons F move to the right the left piston strikes the adjacent plunger-valve K and moves both valves K to the right. This causes the groove or neck of the right-hand plunger-valve to be covered by the cap E, and the right hand port 0 is also cut oil by the solid part of the right-hand plungervalve. This causes the port 0 of the righthand plunger valve to be in communication with the right hand cylinder, whereby the water in the latter immediately enters said port, and, flowing through the portf, reaches port f, and consequently the exhaust-port 1). Meanwhile the groove or neck of the left-hand plunger -valve is uncovered and water enters the port 0 of the left-hand cylinder G, and so presses on the balanced piston as to shift it to the right, and the other operations are similar to those above described, and therefore repeated as long as the apparatus is required to render service. The caps E having chambers and cylinders J G cast with them render the parts strong and avoid joints, which are liable to break.

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

l. Stationary cap E, cast in one piece with a cylinder, G, and a valve-chamber, J, in combination with a plunger or valve moving in said chamber and recessed to afford a passage, said cap closing said passage in one position of said plunger, substantially as set forth.

2. The caps or plates E, each having a valvechamber, J, and a cylinder, G, cast with it on its inner side, the inner ends of said cylinders being open,in combination with a piston working in said cylinders, substantially as set forth.

3. In combination with chamber A and the two compressing cylinders, the independent valve-cylinders G, arranged within said chamber and opening inwardly, and the hollow balaneed piston G, reciprocating in said cylinders, substantially as set forth.

4. The piston-rod D, having hollow balanced piston G fitted to slide thereon and passing through stationary caps E and open-end cylindersG,in combination with said piston, caps, and cylinders, and the central packing, a, substantially as set forth.

5. In combination with chamber A and the cylinders B B, arranged at the ends thereof, the caps E, having in wardl y-openin g cylinders G on their inner faces, the piston-rod D, passing through the said chamber, caps, and cylinders, and the pistons F and G, carried by said rod, arranged and operating substantially as set forth.

6. The plungervalve K, with port a and neekf, the valve-chambers J, the cylinders G, with ports 6, the caps E, with portsf, the seat with port-f, and the exhaust-port 1), combined and operating substantially as and for the purpose set forth.

7. The cylinders B B and chamber A, in combination with the separating-caps E, having openings 1), the valve H, and valve-seat H, with ports a a 12, substantially as and for the purpose set forth.

8. The plunger-valves, with ports 0, the cylinders G, with ports 0, the caps E, with ports f, the balance piston G, the cylinders, and chamber, combined and operating substantially as and for the purpose set forth.

9. The chamber A and cylinders 13 B at the ends thereof, in combination with the pistonrod D, provided with balanced piston G within said chamber, anti pistons F within said oyl-' inders, and the outwardly-opening valves gin the ends of said cylinders, substantially as set forth.

WILLIAM ANG,

Witnesses:

JOHN A. WIEDERsHnIM, W. F. KIRcrrER.

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