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Patent US3766783A successfully refreshed from Google Patents.
US3766783A
Expired / Lapsed
US
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Gas bulb for a gas-filled dial thermometer
Assignee: Individual
•
Filing: 1971-04-21
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Granted: 1973-10-23
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Expires: 1991-04-21
Abstract
Abstract A gas bulb for a gas-filled thermometer, the bulb containing activated coconut charcoal, and having dimensions such that the internal volume is about 0.15 cubic inches, operating on the principal of adsorption and emission of an agent of the activated coconut charcoal, thus indicating an appropriate change in temperature depending upon the amount of agent emitted or absorbed by the activated coconut charcoal.
Inventors
- 👤 J Tortoso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:04
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/32; G01K5/326
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
122 words
A gas bulb for a gas-filled remote thermometer consisting essentially of a cylindrical inert gas-containing housing having an internal volume of no greater than 0.15 cubic inch, said housing also containing a gas-adsorbing material degassed of substantially all foreign gases and which adsorbs and emits said inert gas with a proportional change in temperature, said gasadsorbing material consisting essentially only of activated coconut charcoal having a size of from about 6 to 15 mesh and being present in an amount of from 0.6 to 0.8 gram, said gas bulb providing accurate and measurable changes of pressure within said housing due to the adsorption and emission of said gas by said gas-adsorption material over the entire temperature range of from -40* to 500*F.
Claim 2
Dependent Claim
122 words
A gas bulb for a gas-filled remote thermometer consisting essentially of a cylindrical inert gas-containing housing having an internal volume of no greater than 0.15 cubic inch, said housing also containing a gas-adsorbing material degassed of substantially all foreign gases and which adsorbs and emits said inert gas with a proportional change in temperature, said gasadsorbing material consisting essentially only of activated coconut charcoal having a size of from about 6 to 15 mesh and being present in an amount of from 0.6 to 0.8 gram, said gas bulb providing accurate and measurable changes of pressure within said housing due to the adsorption and emission of said gas by said gas-adsorption material over the entire temperature range of from -40* to 500*F.
Claim 3
Dependent Claim
31 words
The gas bulb of claim 1 wherein said housing has a diameter of from about 0.250 to about 0.375 inch and a length of from about 1.350 to about 1.5 inch.
Claim 4
Dependent Claim
30 words
charging said gas bulb with from 0.6 to 0.8 gram of a gas-adsorbing material consisting essentially only of activated coconut charcoal having a size of from 6 to 15 mesh;
Claim 5
Dependent Claim
30 words
charging said gas bulb with from 0.6 to 0.8 gram of a gas-adsorbing material consisting essentially only of activated coconut charcoal having a size of from 6 to 15 mesh;
Claim 6
Dependent Claim
25 words
providing a pressure-sensitive temperature indicating device and connecting said device to said gas bulb by means of a capillary to form a remote thermometer system;
Claim 7
Dependent Claim
25 words
providing a pressure-sensitive temperature indicating device and connecting said device to said gas bulb by means of a capillary to form a remote thermometer system;
Claim 8
Dependent Claim
20 words
The gas bulb of claim 2 wherein about 0.6 gram of said activated coconut charcoal is present in said housing.
Claim 9
Dependent Claim
83 words
A remote thermometer system effective over a temperature range of from -40* to 500*F. comprising the gas bulb of claim 1, a pressure-sensitive temperature indicator and a capillary tube connecting said glass bulb and said indicator, whereby said indicator registers the temperature which said gas bulb is subjected to by means of the pressure change in said gas bulb communicated to said indicator through said capillary tube, said gas bulb having been pressurized with said inert gas at a temperature of about -30*F.
Claim 10
Dependent Claim
16 words
simultanEously evacuating said thermometer system and heating said system to substantially completely degas said gas-adsorbing material;
Claim 11
Dependent Claim
16 words
simultanEously evacuating said thermometer system and heating said system to substantially completely degas said gas-adsorbing material;
Claim 12
Dependent Claim
18 words
heating said system to a temperature of about 10*F. above the lower temperature of said given range; and
Claim 13
Dependent Claim
18 words
heating said system to a temperature of about 10*F. above the lower temperature of said given range; and
Claim 14
Dependent Claim
22 words
The remote thermometer system of claim 4 wherein said gas bulb is pressurized to a pressure of from 100 to 360 psi.
Claim 15
Dependent Claim
15 words
The thermometer system of claim 4 wherein said indicator is a Bourdon tube temperature gauge.
Claim 16
Dependent Claim
7 words
pressurizing said system with an inert gas.
Claim 17
Dependent Claim
7 words
pressurizing said system with an inert gas.
Claim 18
Dependent Claim
33 words
The thermometer system of claim 6 wherein the length of said capillary tube varies from 10 to 100 feet and wherein the bore of said capillary tube varies from 0.007 to 0.010 inch.
Claim 19
Dependent Claim
17 words
The thermometer system of claim 7 wherein the bore of said capillary tube is about 0.007 inch.
Claim 20
Dependent Claim
56 words
The gas bulb of claim 1 wherein said housing contains said inert gas in an amount sufficient to provide a pressure of from 100 to 360 psi, said gas bulb having been pressurized at a temperature of about 10*F higher than the lower temperature of the range of temperature said gas bulb is adapted to measure.
Claim 21
Independent Claim
22 words
A method of charging a gas-filled remote thermometer designed to operate accurately over a given temperature range with a gas-adsorbing material comprising;
Claim 22
Independent Claim
22 words
A method of charging a gas-filled remote thermometer designed to operate accurately over a given temperature range with a gas-adsorbing material comprising;
Claim 23
Dependent Claim
45 words
The method of claim 10 wherein said system is evacuated to a pressure of from about 20 to about 30 inches of mercury and simultaneously heated several times to a temperature of from 800* to 900*F over a period of from 4 to 6 hours.
Claim 24
Dependent Claim
25 words
The method of claim 11 wherein said system is pressurized to a pressure of from 100 to 360 psi with nitrogen, carbon dioxide or argon.
Claim 25
Dependent Claim
15 words
The method of claim 12 wherein said given temperature range is from -40* to 500*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |