Digital pressure standard

Details Digital pressure standard Digital pressure standard

1976-03-12

1977-11-22

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

137 85, G05D 1620

Patent

active

040591280

ABSTRACT:
Pressure regulator system and apparatus for producing a controlled output pressure corresponding to a pre-programmed BCD set point command. Measured values of output fluid pressure emitted from the regulator is applied in BCD signal form to electronic logic in which the measured signal is compared with the signal of the set point. In response to a determined differential between signals, output pressure is changed in a series of repetitive but rate variable differential reduction steps until set point pressure is achieved. In each step a D. C. motor under control of a logic actuated servo-system operates a force balanced air system to adjust a primary control pressure which in turn operatively resets the output pressure of the regulator.

REFERENCES:
patent: 3315250 (1967-04-01), Higgins
patent: 3726296 (1973-04-01), Friedland
patent: 3914581 (1975-10-01), Gilson

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