Patent US3194130A successfully refreshed from Google Patents.
Patent US3564246A successfully refreshed from Google Patents.
US3564246A
Expired / Lapsed
US
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Gamma compensated fission thermocouple
Assignee: United States Atomic Energy Commission
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Filing: 1965-08-05
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Granted: 1971-02-16
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Expires: 1985-08-05
Abstract
Abstract A neutron flux measuring apparatus being the combination of a first and a second thermocouple connected in series in polarity opposition and each comprising an identical pair of dissimilar leads and a middle metallic spherical body having a diameter equal substantially to the mean free path of a thermal neutron in the uranium isotope, the neutron flux of which is being measured, one of the middle metallic bodies being of fissionable material and the other middle metallic body being of nonfissionable material but being equally gamma responsive.
Inventors
- 👤 Roderick Gordon Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:45
CPC Classifications
G; G01; G01T; G01T3/00; G01T3/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
A neutron flux detector which is nonresponsive to gamma radiation comprising a first thermocouple comprising two dissimilar thermocouple leads having a diameter not in excess of 0.001 inch and an intermediate electrical and head conducting body of fissionable material and size and a second thermocouple comprising two thermocouple leads of the same material as the thermocouple leads of the first thermocouple and an intermediate electrical and heat conducting body of nonfissionable metal, said first thermocouple leads being electrically and thermally affixed to the first intermediate body to form a first composite thermocouple and the second thermocouple leads being electrically and thermally affixed to the second intermediate body to form a second composite thermocoupLe, said first and second composite thermocouples being serially electrically connected in circuit in polarity opposition with each other, an electrically responsive measuring device and means electrically connecting the measuring device in series with the said circuit of the composite thermocouples in which the intermediate conducting body of the first thermocouple is a sphere of fissionable material having a diameter of 0.016 inch, substantially, and the intermediate conducting body of the second thermocouple is a sphere of nonfissiable metal having a diameter of 0.016 inch, substantially.
Claim 2
Dependent Claim
198 words
A neutron flux detector which is nonresponsive to gamma radiation comprising a first thermocouple comprising two dissimilar thermocouple leads having a diameter not in excess of 0.001 inch and an intermediate electrical and head conducting body of fissionable material and size and a second thermocouple comprising two thermocouple leads of the same material as the thermocouple leads of the first thermocouple and an intermediate electrical and heat conducting body of nonfissionable metal, said first thermocouple leads being electrically and thermally affixed to the first intermediate body to form a first composite thermocouple and the second thermocouple leads being electrically and thermally affixed to the second intermediate body to form a second composite thermocoupLe, said first and second composite thermocouples being serially electrically connected in circuit in polarity opposition with each other, an electrically responsive measuring device and means electrically connecting the measuring device in series with the said circuit of the composite thermocouples in which the intermediate conducting body of the first thermocouple is a sphere of fissionable material having a diameter of 0.016 inch, substantially, and the intermediate conducting body of the second thermocouple is a sphere of nonfissiable metal having a diameter of 0.016 inch, substantially.
Claim 3
Dependent Claim
52 words
The neutron flux detector of claim 1 in which the intermediate conducting body of the first thermocouple is a uranium isotope and the intermediate conducting body of the second thermocouple is a nonfissionable metal having substantially the same density and size as that of the intermediate conducting body of the first thermocouple.
Claim 4
Dependent Claim
30 words
The neutron flux detector of claim 2 in which the intermediate conducting body of the first thermocouple is uranium-235 and the intermediate conducting body of the second thermocouple is tungsten.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |