US151753A - Improvement in air compressors or blowers - Google Patents

Description

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AUNITED STAT-Es PATENT OEEIcE.

LORENZOVCHASE, OF PORTLAND, MAINE, ASSIGNOR OF ONE-HALF HIS i RIGHT TO CHARLES W; OAHOON, OF SAME PLACE.

IMPROVEMENT IN AIR COMPRESSORS OR BLOWERS.

Specification forming part of Letters Patent N0.y 151.753, dated June 9, 1874; application filed May 4, 1874.

To alt/whom it may concern:

Be it known that I, LORENZO CHASE, of Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Air Compressors `or Blowers; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled y in the art to which it pertains to make and use the same, reference being had to the accompanying drawings and to the letters of reference marked thereon, which form a part of this specification.

Figure l is a vertical section of my invention. Figs. 2, 3, 4, and 5 are detail views.

Same letters show like parts.

My invention constitutes an improvement in air compressors or blowers, having reference to that class which has double alternating-acting chambers. Its object is to allow the steam, after having compressed the air in one chamber, tobe expanded into the other, and admitting new steam of higher pressure .in addition thereto, until the requisite pressure is reached, thus greatly economizing the use of the steam.. It also consists, in addition to the above, in allowing the steam beyond atmospheric pressure to escape before furnishing the water for producing the vacuum for the supply of the air, and in the supply and discharge of the water for the purpose, thereby saving water and power. This is all brought about by a few simple changes in the vsteam-chest and valve, and in their operation,

these chambers, having a pipe, a, entering it, which leads downward to a box, d, which has a check-valve opening inwardly. A side view of this tank, with its connections, is shown in Fig. 4. Another pipe, k, leads from the bottom of this tank into apipe, L, the latter having branches, one of which leads into chamber No. 1, the other to chambei` No. 2. Each branch has a conical end with sprayingnozzle, and a check-valve, y. The sides ot' these cones extend beyond the valves, so as to prevent the water from striking the sides of the chambers as it enters. In this pipe L are two cocks, l? l?, which are connected, so as to operate together, by a long rod. These cocks may be used for the purpose of checks in case of there being too low a pressure in the chambers to close the valves y against the water. l is the steam-chest, and M the steamvalve. w is a port in thevalve. A, B, C, D, and E are steam-ports in the chest, the latter being the exhaust. :v is a check-valve to the exhaust-port E, opening outwardly. F and G are separate compartments, to which the ports A, B, C, and D lead, and H H are pipes leading from these compartments into the chambers l and 2, curving upward after entering the same. m is the steam-pipe for supplying the steam-chest from the boiler.

Having thus explained the object and construction of my invention, I will now proceedto describe its operation.

The steam-port A, Fig. l, being open, steam passes from the steam-chest l into the compartment F, and from thence through the pipe H into the compressor No. 1, and, striking against the top of the same, forces the air downward through the compressor, and, through the pipe I at the bottom, into the airreservoir K. From thence it passes through the pipe O into the water, for the propulsion of vessels, or for other blowing purposes. The steam-valve M then shuts o the port A, as in Fig. 2, and places the ports B and C in connection through the port w in the valve, so that the steam in chamber No. l will be expanded into No. 2. The steamvalve, then, continuing its course in the same direction, opens the port D, as in Fig. 3, and lets new steam of higher pressure from the steam-chest into No. 2 in addition to that which it had previously received from No.' l. This brings up the pressure in the No. 2 chamber to the requirement-s of the work, and places the ports A and E in connection, which exhausts the remaining pressure vfrom INO. l. After the pressure has thus been exhausted, the weight of the water in the tank z will open the valve y in the pipe L, and will cause it (the water) to iiow in upon and condense the remaining steam, thereby crea-ting a vacuum and drawing the outside air through the valve N to lill the chamber again for further action. The check-valve 'm prevents the returnl of steam during Vthe vacuum, and the steamvalve M rests at the end .of each stroke, so as to give time for the steam to condense, and for the entrance of the air. The same process is repeated in chamber No. 2, each chamber working alternately, and compressing the air in the reservoir K, opening and closing the valves 7L h as thep'ressure alternates in the chambers. Vhen the water is drawn from the tank z, a vacuum is created therein, which draws up an additional supply lthrough the pipe a from a well outside. lBefore commencing to operate, the tank z and pipe a above the Valve t' should be filled with water through the pipe c, which has a cock, a, to shut it air` tight after being lled. In case the automatic supply of water shouldl not be used, Athe tank z may be supplied by a force-pump, 'the cocks P B regulating the supply tok the chambers, and in case the pressure of ysteam should not be let oft' from the chambers before the water for condensation was furnished, the port E may be dispensed with or closed up, which, when it issimplydesired to blow the air without anyfv'ery materialforce, may be done without much disadvantage. The steam- Valve may be operated by a rocker-arm connected with la steam-engine, moving in the link at the end vof the valve-stem, and the cocks P I?, by cam motion, connecting with the rod attached to the handle of the same. X, Y, and Z show enlarged det-ail views, in section., of the conical nozzles and check-valves y. Fig. 5 shows a detail View of the exhaustport and its check-valve fr. ,Y

What I claim as my invention, and desire to secure by Letters Patent, is

The combinationvof the ports A and D with the ports B and C, and with or without the port E, operating in conjunction with the steam-valve M and itsport w, substantially as and for the purposes set forth. A

In testimony that I claim the foregoing as my ownv I affix my signature 'in Apresence of two witnesses.

LORENZO CHASE.

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