PRESSURE INDICATOR Russian patent published in 2005 - IPC

FIELD: measuring engineering.

SUBSTANCE: housing (1) of the pressure indicator receives bellows (2) connected to core (6) provided with bushing (7) having solenoid (8) which forms inductive converter (9) with core (6). Housing (1) is provided with time relay (15) made of air vessel (16), sensitive member (18) with inductive pickup (19) made of winding (11) and additional core (20) spring-loaded by spring (26), adjustable throttle (22), and stop (25). Before operation, bellows (2) and object (4) are pressurized. In so doing, bellows (2) with bushing (7) moves upward and additional core (20) of pickup (19) enters winding (11), thus signaling of attainment of working pressure. Ring air chamber (13) is then pressurized. In so doing, solenoid (9) is secured to winding (11) interconnected through spacer (10). Relay (15) is pressurized simultaneously. When pressure in bellows (2) drops, core (6) begins to move, thus, generating a signal.

EFFECT: expanded functional capabilities and enhanced reliability.

1 cl, 2 dwg