Improvements in or relating to gas-meters operating under high pressure

摘要

427,934. Gas meters. NAAMLOOZE VENNOOTSCHAP MACHINERIEEN - EN APPARATEN FABRIEKEN MEAF, (formerly NAAMLOOZE VENNOOTSCHAP MACHINERIEEN - EN APPARATEN FABRIEKEN), 30, Croeselaan, Utrecht, Holland. June 25, 1934, No. 18753. Convention date, June 24, 1933. [Class 54] In order to prevent damage to high pressure gas meters by large pressure differences forming between the measuring chambers when the gas inlet valve 17 is opened or closed spring-loaded relief valves 23 are provided in the walls of the measuring chambers 3, 4, 5, 6.