Patent US3775216A successfully refreshed from Google Patents.
US3775216A
Expired / Lapsed
US
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Neutron generating systems
Assignee: Schlumberger Technology Corp
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Filing: 1970-02-19
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Granted: 1973-11-27
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Expires: 1990-02-19
Abstract
Abstract One embodiment of the invention describes a neutron generator tube in which the gas supply is thermally isolated from the ion source by reflective and conductive heat members. The conductive heat member is in thermal contact with the tube envelope to permit the envelope to dissipate waste heat from the ion source to an insulating gas (SF6) in a well logging tool housing. The tool housing also is insulated from an ion source magnet to prevent arcing between the magnet and the tube envelope.
Inventors
- 👤 A Frentrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:40
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; H; H01; H01J; H01J27/00; H01J27/02; H05; H05H; H05H3/00; H05H3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A method for assembling a target for a neutron generator comprising placing a quantity of bonding composition on the bottom of a recess formed in an electrode, superimposing a carbon button having a shank portion and a flange portion over the bonding composition, interposing a ring surrounding said shank portion of said carbon button at least partially within said electrode recess, melting said bonding composition, urging said flanged portion of said carbon button against said recess bottom to cause said melted bonding composition to flow between said ring and at least one side of said electrode recess, and thereafter solidifying said bonding composition.
Claim 2
Independent Claim
116 words
A method for assembling a target for a neutron generator comprising placing a quantity of brazing composition on the bottom of a recess formed in an electrode, superimposing a carbon button having a shank portion and a flange portion over the brazing composition, interposing a ring surrounding said shank portion of said carbon button at least partially within said electrode recess, melting said brazing composition, urging said flanged portion of said carbon button against said recess bottom to cause said melted bonding composition to flow between said ring and at least one side of said electrode recess, and thereafter solidifying said brazing composition whereby said carbon button will be maintained at least partially within said recess.
Claim 3
Dependent Claim
29 words
The method of claim 3 wherein said brazing composition is a copper-silver eutectic brazing compound to provide good thermal and electrical contact between said carbon button and said electrode.
Claim 4
Independent Claim
134 words
A method of assembling a target for a neutron generator comprising placing a quantity of a bonding composition into a recess formed in an electrode, placing a carbon type target material in said recess for contact with said bonding composition in said recess, placing a metallic retaining element, having an opening therein, on the side of said carbon type target material which faces an opening of said recess, said opening in said retaining element also facing the same direction as said recess opening, urging said carbon type target material against said bonding composition to cause said bonding composition to flow between said retaining element and at least one side of said electrode recess, whereby at least part of said carbon type target material will be maintained in said electrode recess by said retaining element.
References Cited (Backward Citations)
US3246191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |