PRESSURE INDICATOR Russian patent published in 2000 - IPC

FIELD: pressure measuring devices. SUBSTANCE: pressure indicator has case with membrane and spring. Displacement-to electric signal converter is fabricated in the form of solenoid anchored on bushing and ferromagnetic core coupled to membrane and placed for interaction with lower part of solenoid. Friction member has ring chamber whose space communicates with pressure source via break valve. Indicator is equipped with service transmitter and time relay. Time relay is made of pneumatic vessel produced in the form of barrel put on case and limited by sensitive element. Sensor of sensitive element is part of time relay and comes in the form of spring rheostat converter. One end of converter is fixed on bottom of barrel and the other one is anchored on sensitive element. Pneumatic vessel is connected via adjustable throttle and valve to pressure source and via exhaust valve - to atmosphere. Service transmitter is formed by solenoid and additional ferromagnetic core interacting with upper part of solenoid. Spring is located in bushing and is made of nonmagnetic material. EFFECT: widened technological capabilities and enhanced functional reliability of pressure indicator. 1 cl, 2 dwg