| 摘要 |
1,036,140. Forcing liquids by liquid pressure. K. C. HANSEN and H. R. HANSEN. May 29, 1963 [June 15, 1962], No. 21403/63. Heading F1R. A liquid measuring and dispensing device, e.g. for metering oil in a domestic supply, comprises a tank 20 containing a quantity of a liquid, e.g. water with added electrolyte, having a higher electrical conductivity and specific gravity than the liquid to be dispensed. In operation, the oil is fed under pressure into the lower chamber 21 of tank 20 via pipe 24 and forces the water into the upper chamber 11 via pipe 22 thereby displacing oil already in chamber 11 via chamber 18 and delivery pipe 19. When the water level reaches an electrode 31 a circuit is energized, via electrodes 32, 33 and a relay, to open a valve 14, thereby permitting flow of oil through pipe 12 from chamber 21 into chamber 11 and through pipe 19, the water in chamber 11 flowing back through pipe 22 into chamber 21. When the water level falls below electrodes 32 and 33, valve 14 is closed and the cycle repeated. A counter in the valve control circuit records the number of cycles. In a supply system a number of the devices are fed from a common, constant pressure oil supply comprising a tank with an air space fed with oil by an electric pump controlled by a pressure switch in the air space. |
