GB459893A - Improvements in or relating to fluid-operated regulators - Google Patents

Abstract

459,893. Fluid-pressure servomotorcontrol systems. GORDON & CO., Ltd., J., O'BREEN, J. E., and SCHIPPERS, J. F., Regent House, Kingsway, London. July 18, 1935, No. 20497. [Class 135] A fluid-operated regulator comprising a servomotor controlled by a pilot valve actuated by a pressure sensitive device, changes in the controlling pressure of which are opposed by compensating pressure changes effected in accordance with the movement of the piston of the servomotor has both pressures indicated at a control panel or other convenient position, so that due changes of compensating pressure may be checked against changes of controlling pressure. The valve 8 controlling the operation of the power device 1 is actuated by a pair of opposed diaphragms 9, 11 loaded by a light spring 31. The controlling impulse transmitted through the pipe 10 acts on the diaphragm 9 and is indicated on a gauge 10<b>. The diaphragm 11 is subject to a pressure derived from a pressure regulating device adjusted by the movement of the power piston, said pressure being transmitted through a pipe 12 and indicated by a gauge 12b. The pressure regulator comprises a piston 13 loaded by a spring 30 and actuated by fluid pressure admitted through a conduit 21 under the control of an auxiliary valve 15 actuated by an inclined or curved cam bar 20 moving with the piston 1. Specification 311,195, [Class 51 (i)], is referred to.