Patent GB-143843-A (GB)
Title: Improvements in and relating to water supply systems
IPC: F04F1/06
Filed: 1920-04-24
Abstract: 143,843. Delco-Light Co., (Assignees of Kettering, C. F., and Buvinger, G. A.). May 23, 1919, [Convention date]. Actuating by rotary motors; eccentric-actuated pumps; double-acting piston pumps; priming; concussionpreventing and relief devices; regulating delivery by varying speed and power of motor; strainers; suction and delivery reservoirs; valves and valveseats, arrangement of.-In a watersupply system for domestic and like purposes, a series electric motor 35, a reciprocating pump unit 23, and a storage tank 20 constitute a unitary structure, and the pressure in the tank is utilized to control the motor automatically. The piston 62 of the pump is driven by an eccentric-rod 56 and eccentric 54 keyed on a shaft 52 which is rotated through worm gearing 50, 51 by the electric motor. The pump is provided with an inlet 24, and an outlet 25 leading to the tank 20, which is provided with an outlet 26, a pressure gauge 28, and a level indicator 27. Normally, the tank is half-full of water, the original volume of air therein being compressed above. The pump inlet and discharge lift valves are arranged in opposite sides of the barrel, Fig. 4, and communicate respectively with the inlet through a chamber 81 and connexion 80, and with the outlet through a connexion 100. An air-adjusting valve 200 allows air to enter the water, but prevents the exit of water. A valve is arranged on the tank to prevent excess of pressure. A partitioned priming-chamber 180 with a spring-controlled valve is arranged at the end of pipe 24, and is provided with a capped concussion pipe 187. The suction pipe 189 leading from the chamber 180 is provided with a perforated cap containing a flap valve 192, Fig. 1<A>. A pipe 123 communicates with the tank 20, with the priming chamber 180 through a pipe 186, and with a chamber 121, Fig. 8, containing a diaphragm 122 which actuates an electro-magnetic switch through a spring-controlled plunger 124 to control the electric motor. The electro-magnet 135 is supported by a U- shaped frame 133, 137. The member 137 carries a stationary carbon contact 142 and a spring-controlled armature 136 which carries the other carbon contact 141; the member 133 carries a stationary contact 131 and a spring-controlled detent lever 150 which locks the armature in the closed position. The contact 142 is connected by a wire to a battery 160 which is connected up to the other contact through a wire 163, the motor 35, a resistance, and a wire 162. The wire 163 is connected by a wire 166 to the contact 131. and the wire 161 is connected by a wire 164. which passes around the core of the magnet 135, with a spring-controlled contact 130 against which bears an insulated head 129 on the plunger 124 when the pressure in the tank 20 falls. This makes the electro-magnet circuit, the armature is attracted, the contacts 141, 142 register, and the motor starts and operates the pump. When the pressure in the tank rises, the movement of the plunger 124 frees the contacts 131, 130 and the lever 150, the motor circuit is broken, and the pump stopped.