Electric-to-pressure transducer

Details Electric-to-pressure transducer Electric-to-pressure transducer

1986-05-13

1987-11-10

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

25112904, G05D 1000

Patent

active

047050675

ABSTRACT:
A linear, closed-loop current-to-pressure transducer operating with a two-way solenoid valve. Outlet fluid pressure feedback is provided by an integral-circuit pressure sensor having a direct, sealed connection to a manifold to which the solenoid valve is also directly connected, the pressure sensor being electrically connected to the feedback input of a servo amplifier which has a reference input connected to an analog control signal input through an input scaling circuit capable of adjusting both span and offset. The input scaling circuit, servo amplifier, pressure sensor, and manifold, which includes a feedback line from the solenoid valve to the pressure sensor, are mounted on a printed-circuit board.

REFERENCES:
patent: 3005462 (1961-10-01), Hillman et al.
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patent: 3244190 (1966-04-01), Taylor
patent: 3856034 (1974-12-01), Itoh
patent: 3877477 (1975-04-01), Bader
patent: 4253480 (1981-03-01), Kessel et al.
patent: 4394871 (1983-07-01), Czajka
patent: 4481967 (1984-11-01), Frick
patent: 4509547 (1985-04-01), Smith
patent: 4573114 (1986-02-01), Ferguson
Specification sheet, Johnson Controls, Models N-6810 and N-6820 Electropneumatic Transducer (undated).
Specification sheet, Fairchild Industrial Products Co., Models T5000-03, T5000-04 and T5000-09 Electromagnetic Transducers, (undated).
Specification sheet, Barber Colman Company, Models CP-8551 and CP-8561, Electronic-pneumatic Transducers, 8-83.
Specification sheet, Robertshaw, Model 2899-040 Electric-Pneumatic Transducer, (undated).
Specification sheet, Kele & Associates, Model MEP-018 Electronic/Pneumatic Transducer, (undated).

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