Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1977-10-11
1980-05-06
Woodiel, Donald O.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73362R, G01K 120
Patent
active
042010896
ABSTRACT:
A thermometer for measuring the temperature of at least one selected portion of an electrically-operated device disposed in a container includes a first upwardly extending conduit adapted to communicate interiorly with the container, and an indicating capacitor defining a first chamber communicating with the first conduit. The indicating capacitor includes a first dielectric material, and a first electrically non-conducting liquid having a predetermined coefficient of thermal expansion; the first liquid is adapted to be disposed at least in part in the container, and at least in part in the first chamber and the first conduit, so that at least a portion of the first dielectric material is constituted by a portion of the first liquid. A reference capacitor defines a second chamber, and includes a second dielectric material. A second electrically non-conducting liquid has substantially the predetermined coefficient of thermal expansion, and is disposed at least in part in the second chamber, and in a second conduit communicating with the second chamber, the second conduit being closed at one end thereof. Any change in temperature in the first liquid will therefore result in a change of the volume thereof in the first chamber, and hence in the capacity of the indicating capacitor, so that any operative difference of the capacities of the capacitors will be proportional to any temperature change of the selected portion of the device.
REFERENCES:
patent: 1879276 (1932-09-01), Isaac
patent: 3190122 (1965-06-01), Edwards
Felber Willibald
Woschnagg Elmar
Elin-Union Aktiengesellschaft
Marmorek Ernest F.
Woodiel Donald O.
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