US580161A - Steam-pump - Google Patents

Description

No Model.) 2 Sheets-Sheet 1.

T. J. OWENS.

STEAM PUMP.

No. 580,161. Patented Apr. 6, 1897.

IpJcgior (No Model.) 2 SheetsSheet 2 T. J. OWENS.

STEAM PUMP.

No. 580,161. Patented Apr, 6, 1897.

UNITED STATES- PATENT OFFICE.

THOMAS J. OWENS, OF BEDFORD, INDIANA.

STEAM-PUMP.

SPECIFICATION forming part of Letters Patent No. 580,161, dated April 6, 1897.

Application filed August 26, 1896. Serial No. 604,010. (No model.)

To all whom, it may concern.-

Be it known that I, THOMAS J. OWENS, a citizen of the United States, residing at Bedford, in the county of Lawrence and State of Indiana, have invented a new and useful Steam Pump, of which the following is a specification.

My invention relates to steam-pumps, and particularly to hot-water feeders for boilers; and the objects in view are to provide means for actuating suction-valves to avoid the resistance of the passage of water to the boiler, to provide means for preventing expansion of the valve from causing inoperativeness thereof, whereby water at any temperature may be pumped without detracting from the efficiency of the apparatus, and, furthermore, to provide such a construction and arrangement of parts as to avoid delay in admitting water to the water-cylinder, whereby the space in rear of the piston is fully occupied by water. Hence jaror hammer due to a partial vacuum when the direction of movement of the piston is reversed is avoided.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claim.

In the drawings, Figure 1 is a side view, partly in section, of a pump constructed in accordance with my invention, the suction and steam valve chests being shown in section. Fig. 2 is apartial section of the watercylinder, showing the discharge-valves. Fig. 3 is a partial section of the water-cylinder, showing the suction-valves.

Similar numerals of reference indicate corresponding parts in all the figures of the drawlngs. 4

1 designates a steam-cylinder, in which is arranged a piston 2, connected to a pistonrod 3, and 4 represents a water-cylinder inclosing a pump-piston 5, which is connected to said piston-rod to receive motion from the piston operating in the steam-cylinder. In

connection with the water-cylinder is arranged a delivery-chamber 6, communicating with an outlet-pipe 7, and connected with the delivery-chamber is a compressor or air-chamher 8. Communication is established between the water-cylinder and the delivery-chamber by means of ports 9 and 10, controlled by delivery check-valves 11, and said valves are mounted in suitable guides 12 and are normally held seated by means of springs 13.

In connection with the water-cylinder I employ a feed-chamber 14, having a supplypipe 15 in communication therewith. Spaced valve-seats 16 are arranged within the casing The inlet of steam to the steam-cylinder is controlled by a main slide-valve 27, operating in connection with a valve-seat 28 and controlling inlet-ports 29 and 30 and an exhaustport 31, a steam-inlet pipe 32 being arranged in communication with a piston-valve casing 33, and this main slide-valve is operated by means of an actuating piston-valve 34,mounted in said casing 33 and provided at its center with a seat to receive a projection 35 on the main slide-valve. This actuating-piston is controlled by pressure admitted at the extremities of the casing 33 through ports in the auxiliary valve-seat 36, and said ports are controlled by means of an auxiliary slidevalve 37, having a stem 38.

Carried by the piston-rod 3 is a reverser 39, consisting of a block provided with a bifurcated head 40, through which extends the suction-valve stem 24, and said valve-stem is provided at intervals with adjustable stopcollars or tappets 41 and contiguous cushions 42, whereby as the reverser is moved in opposite directions by the reciprocation of the piston-rod it is brought into contact alternately with the cushions contiguous to the respective tappets to move the valve-stem 24 alternately in opposite directions. The suction-valves 23 are oppositely opening, and hence the alternate movement of their stems in opposite directions causes the simultaneous seating of one valve and unseating of the other, while the same are alternately opened to allow water to be drawn alternately from the intermediate or feed chamber of the suction-valve casing through the the ports and 21 into opposite ends of the water-cylinder. The valves 23 are held in the desired relative positions by means of lock-nuts 43, whereby the proper seating thereof is assured. The auxiliary valve-stem 38 is provide 1 with spaced tappets 44, between which operates a head on the short arm 46 of arocker 47, said rocker having its long arm bifurcated or slotted, as at 4:8, to engage a wrist-pin 49, carried by the piston-rod 3.

In Fig. l the piston is shown as having completed its stroke toward the right, but just prior to reaching the limit of its stroke in this direction the reverser comes in contact with the cushion contiguous to the righthand tappet 41 and moves the valve-stem 24 to unseat the right-hand and seat the lefthand suction-valve, whereby when the succeeding stroke begins the valves will have been set to admit water through the port 20 and allow it to discharge through the port 9.

into the delivery-chamber and from thence through the outlet-pipe 7 into the boiler.

From the above description it will be seen that my present invention consists of an improvement upon that shown and described in my former application, Serial No. 584:, 80S,filed March 25, 1895, an important difierence residing in the fact that both suction-valves are carried by a single stem, which extends from a stufling-box in the end of the casing, thereby avoiding complication of construction, within the casing. The suction-valve seats are accessible for the purpose of cleaning or otherwise through hand-holes 50, formed in the cap-plate of the casing.

Various changes in the form, proportion,

and the minor details of construction maybe 46 resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim isv The combination with coaxial steam and water cylinders having pistons connected by a common piston-rod, suction-valves controlling the inlet-ports of the Water-cylinder and having a reciprocatory stem parallel with said 50 piston-rod, and steam-valve mechanism for controlling the inlet-ports of the steam-cylinder, and including an auxiliary valve having a reciprocatory stem also parallel with said piston-rod, of a reverser 39 fixed to and carried by the piston-rod and arranged in up erative relation with spaced cushioned tap pets on the suction-valve stem, and a rocker having a fixed fulcrum, and provided with a short arm arranged in operative relation with spaced tappets on the auxiliary valve-stem, and a long arm having a pin-and-slot con nection with the piston-rod, whereby approximately simultaneous reversal of the steam and suction valves is accomplished, the move-. ments of the suction-valve being more rapid in their reversal of position than is that of p, the steam-valve, to insure the complete and prompt opening of the former to feed the pump-cylinder with the minimum resistance, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto afiixed my signature in the presence of two witnesses.

THOMAS J OWENS.

' Witnesses:

FERDINAND 0. (Ross, Jr MEs E. BONEFF.

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