Improvements in or relating to hydro-electric servo control mechanisms

摘要

974,511. Fluid-pressure servomotor systems. SOC. D'APPLICATIONS DES MACHINES MOTRICES. March 8, 1961 [March 24, 1960], No. 8426/61. Heading G3P. A hydro-electric control mechanism comprises a rotary valve 2 for controlling the operation of a servomotor 18, a torque motor 4 for controlling the rotary valve and at least one measuring device such as 5 or 6 which can provide a feedback voltage for controlling the torque motor, the components 2, 4, 5 and 6 being mounted on a common rotatable shaft 3 and being accommodated in a housing 9, 10. Liquid-tight membranes 25 and 26 separate the components 4 and 5, 6 from the rotary valve 2, and liquid-tight membranes 23, 24 separate the rotors from the stators of the components 4, 5 and 6. Specifications 731, 881 and 908, 347 are referred to.