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US 3,934,417 AGranted
Thermal responsive device with an adsorbent carbonaceous material
AssigneeRobertshaw Controls Company
InventorsDenis G. Wolfe, Hugh J. Tyler, Wilbur F. Jackson, deceased, by Linda A. Benton, trust administrator
Life of this patent
Estimating the term…
Abstract
A thermal responsive device employs gas, such as a noble gas, with an adsorbent carbon material which is a decomposed carbonaceous compound, such as decomposed polyvinylidene chloride or decomposed polyvinylidene fluoride.
Claims11
A thermal responsive device comprising
- means forming an enclosed chamber;
- an adsorbent carbonaceous material in the chamber;
- a charge of gas in the chamber;
- and
- means responsive to gas pressure in the chamber;
- said adsorbent carbonaceous material being formed from a synthetic polymer selected from the group consisting of polyvinylidene chloride and polyvinylidene fluoride by removing the hydrogen and halogen components to form a carbonaceous skeletal structure having cavities;
- and
- said charge of gas including molecules which have widths smaller than the widths of the cavities so as to be readily adsorbed and desorbed in the cavities of the adsorbent carbonaceous material upon decrease and increase, respectively, of temperature.
5 more elements
A thermal responsive device comprising
- means, including thermal conductive means, forming an enclosed chamber;
- an adsorbent carbonaceous material in the chamber;
- a charge of gas in the chamber;
- and
- means responsive to gas pressure in the chamber;
- said adsorbent carbonaceous material having cavities which have an average width in the range from about 9.2 to 17 angstroms;
- said gas charge including gas molecules having widths smaller than the average width of the cavities so as to be readily adsorbed and desorbed in the cavities upon decrease and increase, respectively, in temperature.
4 more elements
A thermal responsive device comprising
- means, including thermal conductive means, forming an enclosed chamber;
- an adsorbent carbonaceous material in the chamber;
- a charge of gas in the chamber;
- means responsive to gas pressure in the chamber;
- said adsorbent carbonaceous material formed from a synthetic polymer including a material selected from the group consisting of polyvinylidene chloride and polyvinylidene fluoride, said adsorbent carbonaceous material formed by a process including the steps of subjecting the synthetic polymer to a purifying atmosphere and heating the synthetic polymer while subjected to the purifying atmosphere to a temperature above the decomposition temperature of the synthetic polymer but below the melting temperature of the synthetic polymer to form cavities at sites of volatilized components of sufficient size to receive molecules of the gas.
2 more elements
A thermal responsive device comprising
- means, including thermal conductive means, forming an enclosed chamber;
- an adsorbent carbonaceous material in the chamber;
- a charge of gas in the chamber;
- and
- means responsive to gas pressure in the chamber;
- said adsorbent carbonaceous material being porous with cavities wherein a substantial majority of the cavities have substantially uniform widths in the range of about 9.2 to 17 angstroms throughout portions of the depths of the cavities;
- and
- said charge of gas including gas molecules having widths which are smaller than the uniform widths of the majority of cavities so as to be readily adsorbed and desorbed in the cavities upon decrease and increase, respectively, in temperature.
5 more elements
A thermal responsive device comprising
- means, including a metal bulb, forming an enclosed chamber;
- porous carbonaceous granules in the metal bulb, formed by substantially complete pyrolytic decomposition of synthetic polymer granules containing polyvinylidene chloride in a purifying atmosphere at a temperature in the range of about 138.degree.C to 177.degree.C;
- a charge of gas in the chamber, selected from the group consisting of helium, neon, argon, krypton, and xenon;
- and
- expandable and retractable means responsive to the gas pressure in the chamber.
2 more elements
Dependencies are inferred from the claim text.