DIFFERENTIAL PRESSURE SWITCH WITH PIVOTED ONE-PIECE RIGID FLAT SWITCH-ACTUATING DISC MEMBER CAPTURED BETWEEN TWO ROLLING DIAPHRAGMS

摘要

A differential pressure switch comprising a one-piece rigid flat pivoted switch-actuating disc member isolated from the high and low actuating pressures by rolling diaphragms respectively carried by the housing of the pressure switch on opposite sides of and engaging opposite sides of the pivoted member. A compression coil spring biases the pivoted member against the action of the higher actuating pressure and a threaded seat for this spring serves to adjust the spring force applied to the pivoted member.