Pressure-ratio threshold sensor and a machine processing a liquefiable gas and equipped with such a sensor
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United States of America Patent
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-
Feb 18, 1986
Grant Date -
N/A
app pub date -
Apr 10, 1984
filing date -
Apr 14, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A membrane innerly divides a body in two rooms, one of which is subjected to a first pressure of the ratio of pressures which is to be compared to a threshold. In the other room, there is a gas in pressure equilibrium with its condensate; this gas is in thermal contact with another gas which is also in pressure equilibrium with its condensate and which is subjected to the second pressure of the pressure ratio. The forces on the membrane balance each other when the ratio equals the threshold. The threshold is equal to the ratio between the pressure of the two gases in equilibrium with their condensate. This threshold is substantially stable when the temperature varies. The membrane is connected to control means.
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