Measuring and testing – Volume or rate of flow – Expansible chamber
Patent
1975-12-10
1977-01-11
Queisser, Richard C.
Measuring and testing
Volume or rate of flow
Expansible chamber
G01F 112
Patent
active
040020673
ABSTRACT:
A low friction absolute pressure continuous integrator having a vacuum pressure chamber carried by a frame and in which a pressure sensing means is mounted. The pressure sensing means is adapted to expand or contract in a straight line responsive to changes in the line pressure of the fluid flow of the meter. Either the chamber or the pressure sensing means is in communication with the absolute line pressure of the fluid flow, with the other one being evacuated to substantially zero absolute pressure. A link transfer assembly interconnects the pressure sensing means with a continuous integrator assembly whereby variations of the absolute line pressure are converted to a standard pressure to permit totalizing of the standard volume at a corrected counter. An uncorrected totalized volume is simultaneously taken at an uncorrected counter. The working pressure for a device embodying the present invention is in the range of 0-45 psig. In order to greatly reduce losses due to friction and hysteresis, and the factor of non-repeatability in the measurement, the link transfer assembly uses an improved arrangement which includes a knife edge and groove transfer link support whereby the linear motion of the pressure sensing means within the chamber is transferred externally of the chamber by a nonlinear motion of the transfer link. In the preferred embodiment the knife edge and groove is spring-loaded through the transfer link.
REFERENCES:
patent: 3721125 (1973-03-01), Kugler
patent: 3946609 (1976-03-01), Kugler
Bell Edward L.
Kreitman Stephen A.
Queisser Richard C.
Smith Robert E.
The Singer Company
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