Eugene B Perrine Deceased6307 Mayfield Dr, Pine Bluff, AR 71603

4365503, Dec 28, 1982

Mar 28, 1980

6/136077

William W. Ho - Thousand Oaks CA
William F. Hall - Thousand Oaks CA
Harry W. Fisher - Pittsburgh PA
Eugene B. Perrine - Pittsburgh PA

Rockwell International - Pittsburgh PA

G01F 2500

73 3

Apparatus for calibrating a meter prover is disclosed including a chamber taking the form of a substantially perfect right circular cylinder, a piston adapted for rectilinear movement within said cylinder between a first position and a second position, means for moving the piston from its first position to its second position, and an encoder coupled to the piston for providing an output signal indicative of the movement of the piston and thus the volume of fluid displaced by that movement of the piston. The calibrating apparatus comprises an antenna electromagnetic energy to the antenna whereby electromagnetic waves are emanated into the chamber. A detector is coupled to the antenna to detect electromagnetic energy leaving the chamber and is in turn coupled to a resonant detector in the form of a cathode ray tube, whereby a minimum of the level of the electromagnetic energy may be determined. Further, a frequency detector in the form of a counter, is connected to the output of the generator to detect the frequencies of the generator output at which the minimum level occurs as observed upon the cathode ray tube corresponding to the establishment of a resonant standing wave within the chamber of the meter prover. The frequencies at which the resonant standing waves are established within the chamber, in turn determine the volumes corresponding to the first and second positions and therefore the difference in volume between the first and second positions corresponds to the displacement volume as would be drawn by the movement of the piston from its first to its second position through the fluid flow meter under test.

4347731, Sep 7, 1982

Mar 28, 1980

6/136513

Harry W. Fisher - Pittsburgh PA
Eugene B. Perrine - Pittsburgh PA

Rockwell International Corporation - Pittsburgh PA

G01F 2500

73 3

Apparatus for calibrating a flow meter under test is disclosed as including a chamber having an opening to be coupled by a conduit to the fluid meter under test, a piston to be driven by a motor in a first direction and in a second direction. A first valve is disposed within the conduit and inserted between the chamber opening and the fluid meter under test, while a second valve is associated by the conduit to the opening to permit exhaust of the fluid from the chamber. A control circuit including a microprocessor operates in a first mode to energize the motor to drive the piston in the first direction to draw fluid from the meter into the chamber while actuating the first valve to be opened and maintaining the second valve in its closed position. The control circuit operates in a second mode of operation to energize the motor to drive the piston in the second direction while actuating the first valve to its closed position and the second valve to its open position to permit exhaust of fluid therethrough from the chamber.