Adsorption type gas-filled thermometer
AssigneeTexaco Inc.
InventorRobert A. Woodle
Life of this patent
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Abstract
A gas-filled thermometer which employs hydrogen and an adsorbent compound in a temperature sensitive bulb, with a pressure transducer connected to the bulb to indicate the temperature. The adsorbent compound has a composition conforming to the formula LT.sub.5 where L is a lanthanide rare earth element and T is a 3d-transition element.
Claims11
An adsorption type gas-filled thermometer, comprising
- a temperature sensitive bulb having a gas adsorbent therein connected to a pressure transducer for indicating the amplitude of gas pressure in a closed system connecting said bulb to said transducer, wherein
- said gas is hydrogen, and
- said adsorbent comprises at least one compound consisting of the formula LT.sub.5, where L is a lanthanide rare earth element and T is a 3d-transition element.
An adsorption type gas-filled thermometer, comprising
- a metal bulb having a predetermined quantity of La Ni.sub.5 therein,
- a Bourdon spiral for transforming gas pressure into a proportional physical displacement,
- a predetermined length of capillary tubing for connecting said metal bulb to said Bourdon spiral, and
- a predetermined quantity of hydrogen gas filling said bulb spiral and tubing being between 0.2 mole H.sub.2 per mole La Ni.sub.5 and 3 moles H.sub.2 per mole La Ni.sub.5.
A method of measuring temperature which employs an adsorption type gas-filled thermometer including a temperature sensitive bulb having a predetermined quantity of absorbent material therein and including a sealed system connecting said bulb to said transducer, the improvement comprising
- employing at least one compound as said adsorbent material which consists of the formula LT.sub.5 wherein L is a lanthanide rare earth element and T is a 3d-transition element, and
- employing hydrogen as said gas.
Dependencies are inferred from the claim text.