Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1987-07-16
1989-03-21
Levy, Stewart J.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73 4V, G01L 2700
Patent
active
048132659
ABSTRACT:
Apparatus for providing a calibrated gas pressure comprising a piston mounted within a cylinder, there being provided a gap between adjacent walls of the piston and cylinder, the cylinder being generally closed at one end so as to provide a closed chamber. The closed chamber includes an outlet for gas at a calibrated pressure and a variable outlet valve. A gas inlet is provided in the wall of the cylinder adjacent to the position of the piston, and the piston engages a force measuring apparatus such that gas, in use, is supplied to the gas inlet and passes to the chamber to provide a calibrated gas pressure within the chamber, the pressure being measured by the force measuring apparatus.
REFERENCES:
patent: 3164979 (1965-01-01), Siegel
patent: 3473366 (1969-10-01), Smith
patent: 4413526 (1983-11-01), Delajoud
patent: 4658829 (1987-04-01), Wallace
patent: 4664635 (1987-05-01), Hermann
NASA Tech. Brief, 68-10412, Dec. 1968.
NASA Tech. Brief, 69-10713, Dec. 1969.
Furness Joseph T.
Rosenberg Henri
Furness Controls Limited
Levy Stewart J.
Raevis Robert R.
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