Patent US1802832A successfully refreshed from Google Patents.
Patent US3768301A successfully refreshed from Google Patents.
US3768301A
Expired / Lapsed
US
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Arrangement for determining the thermal conductivity of gases
Assignee: Individual
•
Filing: 1971-11-23
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Granted: 1973-10-30
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Expires: 1991-11-23
Abstract
Abstract An arrangement for measuring the thermal conductivity of a gas in which a temperature sensor is held within a duct oriented perpendicular to a plurality of smaller ducts carrying the gas to be subjected to the measurement. The plurality of gas ducts intersect the duct carrying the temperature sensor, in a tangential manner, so that a whirl of the gas is created along the wall of the duct carrying the temperature sensor, while the zone in immediate proximity to the gas has substantially stagnant gas.
Inventors
- 👤 H Feichtinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:31
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N30/66; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
An arrangement for measuring the thermal conductivity of gases comprising, in combination, duct means confining said gas to flow aLong a predetermined path; cylindrical bore means located substantially perpendicular to and communicating with said duct means; temperature sensing means enclosed within the interior zone of said bore means, said duct means comprising at least two transverse ducts each duct intersecting said bore means tangentially and at a point remote from the ends of each duct, said ducts in pairs distributed along said bore means, the gas molecules of each stream from said ducts travelling within said bore means in substantially circular parallel paths.
Claim 2
Dependent Claim
103 words
An arrangement for measuring the thermal conductivity of gases comprising, in combination, duct means confining said gas to flow aLong a predetermined path; cylindrical bore means located substantially perpendicular to and communicating with said duct means; temperature sensing means enclosed within the interior zone of said bore means, said duct means comprising at least two transverse ducts each duct intersecting said bore means tangentially and at a point remote from the ends of each duct, said ducts in pairs distributed along said bore means, the gas molecules of each stream from said ducts travelling within said bore means in substantially circular parallel paths.
Claim 3
Dependent Claim
21 words
The arrangement as defined in claim 1 wherein said duct means has a substantially smaller cross section than said bore means.
Claim 4
Dependent Claim
40 words
The arrangement as defined in claim 1 wherein said duct means comprises a first pair of ducts spaced along one half of said bore means, and a second pair of ducts spaced along the other half of said bore means.
Claim 5
Dependent Claim
66 words
The arrangement as defined in claim 3 including inlet duct means communicating with the inlet ends of said first pair of ducts and said second pair of ducts; an outlet duct means communicating with the outlet ends of said first pair of ducts and said second pair of ducts, said inlet duct means and said outlet ducts means being substantially transverse to said pairs of ducts.
Claim 6
Dependent Claim
54 words
The arrangement as defined in claim 4 including gas inflow means communicating transversely with said inlet means; and gas outflow means communicating transversely with said outlet means, the axes of said inflow means and said outflow means being symmetrically located with respect to said first pair of ducts and said second pair of ducts.
Claim 7
Dependent Claim
39 words
The arrangement as defined in claim 3 wherein said bore means has a diameter of 8 to 15 mm and an axial length of 10 to 20 mm, said ducts each having a diameter of 1.8 to 3 mm.
Claim 8
Dependent Claim
42 words
The arrangement as defined in claim 1 wherein said duct means comprises a first set of three ducts spaced along one half of said bore means, and a second set of three ducts spaced along the other half of said bore means.
Claim 9
Dependent Claim
82 words
The arrangement as defined in claim 7 wherein said bore means has a diameter of 5 to 6 mm and an axial length of 18 to 30 mm, said ducts each having a diameter of 1.2 to 2.2 mm; and including inlet duct means communicating transversely with the inlet ends of said ducts, and outlet duct means communicating transversely with the outlet means of said ducts, said outlet duct means having a substantially larger cross sectional area than said inlet duct means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |