US805586A - Pump. - Google Patents

Description

PATENTED NOV. 28, 1905.

w. H. SHAFER.

PUMP.

APPLICATION FILED 11211.20, 1905.

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PATENTED NOV. 28, 1905.

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No. 805,586.v

W. H. SHAFER.

PUMP

APPLICATION FILED APR. 20. 1905.

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UNITED STATES PATENT OFFICE.

WILLIAM H. SHAFER, OF CINCINNATI, OHIO, ASSIGNOR TO THE AHRENS FIRE ENGINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

PUMP.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed April 20, 1905. Serial No 256,627.

To all w/wm it may concern:

Be it known that I, WILLIAM H. SHAFER, a citizen of the United States, residing at Cincinnati, Ohio, have invented a new and useful Improvement in Pumps, of which the following is a specification.

My invention relates to pumps of the dupleX double-acting class adapted to use in fireengines and elsewhere; and the objects of my improvement are to place certain valves in recesses formed in the channels to prevent them from obstructing the currents, to locate the supply-openings in an unobstructed line, to form the different chambers on curved lines to avoid conflicting currents, and to dispose the various chambers in a single integral structure in such manner as to obtain maximum capacity and efiiciency with the most compact, rigid, and durable form of construction. These objects are attained in the following-described manner, as illustrated in the accompanying drawings, in which- Figure 1 is a plan, with parts in section, on the line w w of Figs. 2 and 3, of a pump of the designated class embodying my improvements; Fig. 2, a vertical section on the line a a of Figs. 3 and 4; Fig. 3, a front elevation, with parts broken away and parts in section, on theline y 1 of Fig. 4E; and Fig. 4, a plan, with the head removed and parts in section, on the line a z of Fig. 3.

In the drawings, the pump-body 5 consists of intersecting vertical cylinders 6 and 7, formed integral with each other and with discharge-chamber 8. The cylinders are provided withremovable heads 9 and 11 and the chamber 8 with removablefront wall 12. Said chamber is formed with discharge-openings 13 in its opposite ends each adapted to the engagement of a hose therewith and with a central top opening 14, which communicates with an ordinary air-chamber. (Not shown.)Parallel partitions 15 and 16, formed within the cylinders, terminate invertical wall 17 parallel with and joined to therear wall 18 of the discharge-chamber by anarrow middle partition 19. They separate the common suction-chamber 21 from the independent top and bottom pulsation-chambers 22 and 23, located in the ends of the cylinders on opposite sides of the middle wall 24:. Pump-barrels 25, concentric with the respective cylinders, are each provided with aplunger 26, which may be reciprocated therein in the usual manner by means of a duplex engine, (not shown,) preferably having quartering strokes. They each extend through the suction-chamber and terminate in open ends within corresponding pulsation-chambers.

Recesses oroffsets 20 are formed inpartitions 15 and 16 on one side of the throat orchannel 27 of the respective pulsation-chambers which lead to the dischargechamber through the corresponding groups of valvedopenings 28, formed inrear wall 18. Valvedopenings 29 within said recesses do not choke or obstruct therespective channels 27, and, together with valved openings '31, they are disposed in circles concentric with the respective ends of the pump-barrels and lead from the suction-chamber to the respective pulsation-chambers throughpartitions 15 and 16. Supply-pipes 32, in registration with each other, are each adapted to the engagement therewith of a suction-hose and formed with anopening 34, which communicates with an ordinary vacuum-chamber. (Not shown.) They communicate with therear portion 35 of the suction-chamber on a line tangent to the pump-barrels to avoid any obstruction thereby to admission of the water to the interior of the suction-chamber. Hand-actuated emergency-valve 36 serves to open orclose passage 37 between the suction and discharge chambers. Y

In operation the downward movement of either plunger draws the water through the appropriate circle of valved openings from the suction to the corresponding top pulsation-chamber and simultaneously drives the water from the corresponding bottom pulsation chamber through the corresponding group of valved openings to the interior of the discharge-chamber. The upward movement of either plunger in like manner fills the corresponding bottom pulsation-chamber and simultaneously drives the water from the top pulsation-chamber to the interior of the discharge-chamber. Either plunger may be actuated independently of the other, but by synchronizing the strokes quartering the most constant stream will be maintained through the discharge-chamber. The pumpbarrels do not obstruct the admission of water to the suction-chamber nor the valves in the recesses its passage to the discharge-chamber, whereby increased valve area is obtained. The cylindrical walls of the suction and pulsation chambers facilitate the movement of water therein and obviate counter currents. The smallest increase in the efiiciency of pumps of this class which will cause them to perform increased duties and surpass the high standard of excellence of the present state of the art adds greatly to their value and desirability.

What 1 claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of a suction-chamber, a pulsation-chamber, a partition between them having valved openings in different parallel planes, a pump-barrel provided with a plunger, a discharge-chamber having a dischargeopening and separated from the pulsationchamber by a valved partition, and an emergency-valve in said partition.

2. The combination of a substantially cylindrical body, parallel partitions therein each having valved openings in different parallel planes and separating a middle suction-chamber from top and bottom pulsation-chambers, a pump-barrel extending through the suctionchamber concentric with the body and terminating in open ends within the respective pulsation-chambers, a reciprocating plunger therein, a supply-pipe communicating with the suction-chamber on a line tangent to the pump-barrel, a discharge-chamber and a vertical partition having groups of valved openings leading thereto from the respective pulsation-ohambers.

3. The combination of a body formed of two intersecting cylinders, a discharge-chamber integral therewith, pump-barrels concentrio with the cylinders, plungers therein, valved partitions separating from a common suction chamber, pulsation-chambers communicating with the respective ends of each barrel, valved ofisets formed in the partitions channels leading from the respective offsets to the discharge-chamber, a valved partition adjacent to the offsets and parallel with the barrels separating the pulsation-chambers from the discharge-chamber.

4. In a pump, the combination of a body, a barrel therein, and a valved partition extending between them and formed with different valved portions in parallel planes, for the purpose specified.

5. A pump of the designated class having in combination a body, a barrel therein, a valved partition extending between the body and the barrel and a valved offset formed therein and in a plane parallel therewith, for the purpose specified.

6. A pump of the designated class having in combination, a cylindrical body, a concentric barrel therein parallel valved partitions extending between the body and the respective ends of the barrel, said partitions being each formed with a valved ofiset in registration with the other and in a plan parallel therewith, whereby increased valve area is obtained without interfering with the passage of water to the discharge-chamber from the pulsation-chambers.

WILLIAM H. SHAFER.

W'itnesses:

ALBERT A. MoEBUs, R. S. CARR.

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