Pressure limiting switch for an instrument air circuit

Details Pressure limiting switch for an instrument air circuit Pressure limiting switch for an instrument air circuit

1980-03-10

1982-01-19

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Plural switch

200 83C, 200 83S, 92 43, H01H 3532

Patent

active

043118925

ABSTRACT:
A pressure limiting switch is provided for limiting the upper and lower limit values of the air pressure in a circuit feeding pneumatic controls. The switch has a switching arm which is pivotable at one end around a fixed axis in the switch body and adapted to actuate with its other end a microswitch closing a valve in the circuit if necessary. The air pressure is sensed by a movable element which engages the switching arm between the pivot axis and the microswitch. The switching arm is spring biased for compensating the microswitch spring. The air pressure range is adjustable through adjusting discs serving as abutments for movement of the switching arm.

REFERENCES:
patent: 2440034 (1948-04-01), Wiegers
patent: 2475069 (1949-07-01), Wood
patent: 2950421 (1960-08-01), Langstroth
patent: 4054763 (1977-10-01), Willcox
patent: 4196326 (1980-04-01), Vogler

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