Digital pressure standard
First Claim
1. Pressure regulating apparatus comprising in combination:
- a. variably settable first regulator means in which to receive a pressure fluid supply from a pressure source and emit the received fluid at a controlled pressure differential from that at which it is received;
b. variably settable second regulator means receiving the emitted fluid from said first regulator means and operative for emitting a controlled differential pressure output of received fluid for supply as a control pressure to said first regulator means for controllably setting the controlled pressure differential emitted by said first regulator means;
c. sensing means for measuring the pressure of fluid discharge emitted from said second regulator means and to emit a BCD signal corresponding to the pressure value thereof;
d. input means operative for establishing a BCD set point pressure command signal for the value of fluid discharge from said second regulator means; and
e. logic means receiving said BCD signals from said sensing means and said input means and operatively effective in response to the signal differential therebetween to repetitively reset said second regulator means for reducing said signal differential until the value of output pressure from said second regulator means corresponds to the set point pressure command signal of said input means.
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Accused Products
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.
14 Citations
14 Claims
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1. Pressure regulating apparatus comprising in combination:
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a. variably settable first regulator means in which to receive a pressure fluid supply from a pressure source and emit the received fluid at a controlled pressure differential from that at which it is received; b. variably settable second regulator means receiving the emitted fluid from said first regulator means and operative for emitting a controlled differential pressure output of received fluid for supply as a control pressure to said first regulator means for controllably setting the controlled pressure differential emitted by said first regulator means; c. sensing means for measuring the pressure of fluid discharge emitted from said second regulator means and to emit a BCD signal corresponding to the pressure value thereof; d. input means operative for establishing a BCD set point pressure command signal for the value of fluid discharge from said second regulator means; and e. logic means receiving said BCD signals from said sensing means and said input means and operatively effective in response to the signal differential therebetween to repetitively reset said second regulator means for reducing said signal differential until the value of output pressure from said second regulator means corresponds to the set point pressure command signal of said input means. - View Dependent Claims (2)
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3. Pressure regulating apparatus comprising in combination:
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a. inlet means in which to receive a pressure fluid supply from a pressure source; b. variably settable regulator means operative for emitting a controlled pressure output of fluid supply received from said inlet means; c. sensing means for measuring the pressure of fluid discharge from said regulator means and to emit a BCD signal corresponding to the pressure value thereof; d. input means operative for establishing a BCD set point pressure command signal for the value of fluid discharge from said regulator means; and
p1 e. logic means receiving said BCD signals and operatively effective in response to the signal differential therebetween to repetitively reset said regulator means for reducing said signal differential until the value of output pressure from said regulator means corresponds to the set point pressure command signal of said input means;
said logic means including means operative to effect reduction of said signal differential at variable rates over the full range differential capacity between said signals in a plurality of seriatimly effected rate reduction steps. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Pressure regulating apparatus comprising in combination:
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a. variably settable first regulator means in which to receive a pressure fluid supply from a pressure source and emit the received fluid at a controlled pressure differential from that at which it is received; b. variable settable second regulator means receiving the emitted fluid from said first regulator means and operative for emitting a controlled differential pressure output of received fluid for supply both as a control pressure to said first regulator means for controllably setting the controlled pressure differential emitted by said first regulator means and to a connection for utilization apparatus to be actuated thereby; c. sensing means adapted for measuring the pressure of fluid at the utilization apparatus and to emit a BCD signal corresponding to the pressure value thereof; d. input means operative for establishing a BCD set point pressure command signal for the value of fluid discharge from said second regulator means; and e. logic means receiving said BCD signals from said sensing means and said input means and operatively effective in response to the signal differential therebetween to repetitively reset said second regulator means for reducing said signal differential until the value of output pressure at the utilization apparatus generally corresponds to the set point pressure command signal of said input means.
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Specification