EXCESS PRESSURE SIGNALIZER WITH PRESSURIZED CONTACT CHAMBER Russian patent published in 2010 - IPC G01L19/12 

FIELD: instrument making.

SUBSTANCE: invention relates to instrument making and can be used in pressure control systems to generate control signal when controlled parametre reaches preset value. Proposed signalizer comprises casing with pressure feed branch pipe and flapping membrane attached inside said casing. Note here that said casing, branch pipe, membrane and cover are arranged on common axis. Said cover sitting in the casing accommodates movable bush screwed therein and furnished with coaxially arranged glass cylindrical insulator. The latter houses the sleeve moving via the cover internal thread in tuning the signalizer. There is a current conductor, passed through said sleeve and having a terminal on its end face to interact with the separating membrane center when signalizer operates. Said current conductor is arranged in pressurized contact chamber. Note here that pressurized chamber inner space is pumped out via axial bore made in said current conductor and made tight by welding up the sleeve and current conductor. Note also that separating membrane is arranged between flapping membrane and terminal. In turning, separating membrane displaces relative to flapping membrane surface. Note that cover has a hole communicating flapping membrane inner surface and separating membrane outer surface with ambient air pressure.

EFFECT: stable operation of signalizer under severe operating conditions.

3 cl, 1 dwg