Temperature responsive temperature/pressure display for a liquefied nitrous oxide container
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United States of America Patent
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-
Oct 3, 2000
Grant Date -
N/A
app pub date -
Aug 17, 1998
filing date -
Aug 17, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dual display temperature/pressure gauge (10) for a container (8) of compressed liquefied gas includes a planar strip of material having a display side (12) which is visible when the strip is placed in contact with a container (8) of compressed liquefied gas; a temperature display region (14) on the display side (12) which includes a first set of numerals representing a range of measured temperature readings; a pressure display region (16) on the display side (12) which includes a second set of numerals representing a range of internal vapor pressure readings calculated to correspond to the the temperature numerals; and thermochromic liquid crystal means for displaying the appropriate numerals corresponding to the measured temperature and calculated internal vapor pressure within the container. The gauge is useful for many gases, such as nitrous oxide.
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