Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1980-09-05
1982-05-11
Swisher, S. Clement
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G01L 2700
Patent
active
043286984
ABSTRACT:
A device for calibrating and/or testing a pressure-responsive transducer comprises a piston and cylinder assembly connectable by a transducer dome to a pressure-sensitive face of the transducer. The piston and cylinder assembly comprises a relatively small diameter chamber through which a piston is controllably movable in air-tight contact with the interior wall of the chamber. The relatively small diameter chamber is in communication with a larger volume compression chamber, which is provided with an outlet port which is sealed an adaptor for connecting the piston and cylinder assembly to said dome.
The piston is manually movable through the small diameter chamber from a retracted position, in which the chamber is vented to ambient atmospheric pressure, through a series of predetermined intermediate positions, each of which corresponds to a known increased pressure value in the dome.
REFERENCES:
patent: 180625 (1876-08-01), Osborne
patent: 3164979 (1965-01-01), Siegel
patent: 4051712 (1977-10-01), Zias et al.
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