Pneumatic servo assembly for an electro pneumatic converter

Details Pneumatic servo assembly for an electro pneumatic converter Pneumatic servo assembly for an electro pneumatic converter

1985-07-02

1986-09-09

Cohan, Alan

Fluid handling

Pressure modulating relays or followers

With counter-balancing pressure feedback to the modulating...

137 82, G05D 1600

Patent

active

046102639

ABSTRACT:
A pneumatic servo assembly (20) is provided for an electro-pneumatic control system (10) having closed loop control of a D.C. motor (12) operated from an error signal (56) developed from an electrical set point signal (4) and a pneumatic feedback signal (44). The feedback signal (44) is made compatible by a pressure transducer (26) monitoring the pressure output signal (22) of the pneumatic servo assembly (20) and establishing an electrical signal indicative thereof which is scaled, zeroed, and amplified by an amplifier unit (46).

REFERENCES:
patent: 2776669 (1957-01-01), Gorrie
patent: 4112960 (1978-09-01), Hermanns
patent: 4172464 (1979-10-01), Rezendes
patent: 4388942 (1983-06-01), Mito

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