US 979633 A
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S. E. AARON. PUMPING APPARATUS. APPLICATION FILED NOV 27, 1909.
Patented Dec. 27, 1910.
I T i rat are.
SOLOMON E. AARON, F CHARLESTOWN, IVTASSACIIUSETTS.
Specification of Letters Patent.
Patented Dec. 2?, 1910.
Application filed November 27, 1909. Serial No. 530,181.
To all whom it may concern:
Be it known that I, SOLOMON E. AARON, citizen of the United States, residing Charlestown, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Pumping Apparatus, of which the following is a specification.
This invention relates to improvements in pumping apparatus for use in connection with boats driven by internal combustion engines in which a pump drawing water from the exterior of the boat circulates the same through the water jacket or jackets of the engine and discharges the water overboard.
This invention relates more particularly to improvements in the pumping apparatus for which I have been granted Letters Patent of the United States No. 952,291, dated March 15, 1910, in which an ejector supplied with water from the water jacket creates a continuous suction in a pipe leading to the bilge of the boat, thus lifting any bilge water that may be in the boat and discharging the same, combined with the jacket water, overboard, thus automatically keeping the boat free from bilge water While the engine is running.
The object of the present invention is to provide means to eliminate the pulsations in the pump system so that the load upon the engine in so far as the operation of the pump is concerned, shall be steady, and so that the suction created in the bilge pipe shall be substantially without pulsation, the consequence being that the general eificiency of the apparatus is thereby increased.
The invention consists in the novel features of construction and in the combination and arrangement .of parts set forth in the following specification and particularly pointed out in the claims.
Referring to the drawing: Figure 1 is a side elevation of a boat having a pumping apparatus embodying my invention, a portion of the side of the boat being broken away to disclose the apparatus. Fig. 2 is a cross sectional view taken on line 2*2 of Fig. 1. Fig. 3 is an enlarged sectional view of the ejector, the relief valve and the casing forming the air chamber between the pump and the jet orifice of the ejector.
Like numerals refer to like parts throughout the several views of the drawings.
In the drawing, 5 is an ejector having a pressure inlet 6 for the actuating stream,
a g an outlet 8 for the at l a suction inlet 7 for the entrained stream, combined actuating and entrained streams, and having also a second outlet 9 located between the two inlets 6 and 7, said ejector being provided with a usual jet orifice 10 located adjacent to the suction inlet 7.
The outlet 9 has connected thereto a relief valve 11 of any usual or desired construction and lIHVHlgJUl outlet 12 which is connected by piping 13 to piping 14 leading from the outlet 8 of the ejector. .Vhen the apparatus is employed in connection with a boat, these pipes 13 and 14 are connected to a pipe 15 having an outlet 16 exteriorly of the boat and the suction inlet 7 has connected thereto a bilge pipe 17 leading to a point inside and adjacent to the bottom of the boat.
The inlet 6 is connected by piping 18 to the water jackets 19 of an engine 20 which drives the boat in any usual or desired manner. The water ackets 19 receive their supply of water from an inlet pipe 21 con nected to a suitable pump 22 driven by the engine 20, said pump being suitably constructed todraw .vater inwardly through a pipe 23 having an inlet orifice 24 located exteriorly of the boat and force the water into and through the water jackets l9 and through the ejector 5. The actuating stream of water passing into the ejector through the inlet 6 creates a suction at the suction inlet 7, thus raising any bilge water that may be in the bilge of the boat through the pipe 22 and discharging the combined streams through the outlet 8.
The relief valve 11 is provided to determine the maximum pressure within the connections leading from the pump to the jet orifice 10 of the ejector. here the pump is of the reciprocating type, such as is commonly employed, there would naturally be pulsations corresponding to the strokes of the pump in the connections leading from the pump to the jet orifice 10 and it is to prevent such pulsations that I provide means forming an air chamber between the pump and the jet orifice, said means consisting preferably of a casing or dome. 25 connected to the ejector 5 between the pressure inlet- 6 and the jet orifice 10, the volume-of this air chamber being sufficient to equalize the pressure and substantially eliminate the pulsations between the pump and the jet orifice so that the load upon the engine, in so far as the pump is concerned, is substantially steady and the suction created in the bilge pipe is substantially without pulsation the consequence being that the general efliciency of the apparatus is thereby increased.
Having thus described my invention, what I claim and desire by Letters Patent to secure 1s:
1. The combination with an internal combustion engine having a water jacket; of a pump driven by said engine and connected to said water jacket to pump water thereto; an ejector provided with a jet orifice for the actuating stream connected to said pump, a suction inlet for the entrained stream, an outlet for the combined actuating and entrained streams; and means forming an air chamber located in the connections between said pump and said jet orifice.
2. The combination in a boat of an internal combustion engine having a water jacket; a pump driven by said engine and connected to pump water from the exterior of said boat to said water acket; an ejector provided with a jet orifice for the actuating stream connected to said water acket, a suction inlet for the entrained stream, an outlet for the combined actuating and entrained streams; a bilge pipe leading from said suction inlet to a point inside and adjacent to the bottom of the boat, a pipe leading from said outlet to the exterior of the boat, and means forming an air chamber located in the connect-ions between said pump and said jet orifice.
3. The combination with an internal combustion engine having a water jacket; of a pump driven by said engine and connected to said water jacket to pump water thereto; an ejector provided with a jet orifice for the actuating stream connected to said pump through said water jacket a suction inlet for the entrained stream, and an outlet for the combined actuating and entrained streams; and means forming an air pressure chamber located in the connections between said pump and said jet orifice.
In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.
SOLOMON E. AARON.
LOUIS A. J ONES, SADIE V. MCCARTHY,