Circuit for pneumatic controllers

Details Circuit for pneumatic controllers Circuit for pneumatic controllers

1981-05-21

1984-01-31

Cohan, Alan

Fluid handling

Pressure modulating relays or followers

Plural series units

137 86, G05D 1600

Patent

active

044283911

ABSTRACT:
A circuit for pneumatic controllers, a proportional-action range of which is adjustable, with the circuit including at least one differential amplifier having input pressure chambers being exposed to pressures derived between two throttle resistors respectively inserted in the measured value X input line and the desired value W-input line. All of the resistors are constant and a connecting line is interposed between connecting sections of the resistors, with the connecting line being provided with an adjustable throttle resistor.

REFERENCES:
patent: 2712321 (1955-07-01), Grogan
patent: 3782403 (1974-01-01), Bader

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