PRESSURE CONTROL RELAY Russian patent published in 2003 - IPC

FIELD: electrical engineering. SUBSTANCE: proposed relay that provides for two-level pressure control within comprehensive range of pressure variations has case, rigid-center membrane, plate, sealing membrane, first microswitch, first spring, and revolving lever for actuating first microswitch; novelty is introduction of second spring and second microswitch; first spring and first microswitch are installed on one side of revolving lever from rigid center of membrane, second microswitch, on other side of revolving lever, and second spring is mounted for actuating rigid center of membrane. EFFECT: simplified design; enhanced load-carrying capacity of contact members. 1 cl, 2 dwg