Patent US3666980A successfully refreshed from Google Patents.
US3666980A
Expired / Lapsed
US
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Depressable beam collector structure for electron tubes
Assignee: Varian Medical Systems Inc
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Filing: 1970-10-20
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Granted: 1972-05-30
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Expires: 1990-10-20
Abstract
Abstract A depressible beam collector structure for electron beam tubes is disclosed. The beam collector structure includes a metallic beam collector electrode for collecting and dissipating energy of the beam. An electrically insulative ceramic sleeve surrounds the beam collector electrode for electrically insulating the collector electrode relative to the surrounds of the insulator body. An array of yieldable metallic thermally conductive cantilever fins are interposed between and interconnect the beam collector electrode with the surrounding insulative sleeve for providing a thermally conductive path therebetween. The yieldable cantilever fins conduct heat from the collector to the insulator and thence to the surrounds while preventing transmission of stress due to differential thermal expansion to the brittle insulator.
Inventors
- 👤 Samuel Robert Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:17
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027; H01J23/033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
183 words
In an electron beam tube, means for projecting a beam of electrons over an elongated beam path, beam collector means at the terminal end of the beam path for collecting and dissipating energy of the beam, said collector means including a hollow metallic beam collector structure, an electrically insulative member disposed surrounding said metallic beam collector structure for electrically insulating said collector from the surrounds, yieldable metallic thermally conductive cantilever means interposed between and interconnecting said metallic beam collector structure and said surrounding insulative member for providing a thermally conductive path from said metallic collector structure to said surrounding insulative member, and said cantilever means extending outwardly from said collector structure to said insulative member in a direction inclined at an angle to a line along the shortest distance between said collector structure and said insulative member, whereby said cantilever means are made to flex under differential thermal expansion between said collector and said insulator to reduce transmission of thermally produced stress from said metallic collector to said surrounding insulating member to prevent fracture of said insulative member while allowing thermal conduction thereto.
Claim 2
Dependent Claim
183 words
In an electron beam tube, means for projecting a beam of electrons over an elongated beam path, beam collector means at the terminal end of the beam path for collecting and dissipating energy of the beam, said collector means including a hollow metallic beam collector structure, an electrically insulative member disposed surrounding said metallic beam collector structure for electrically insulating said collector from the surrounds, yieldable metallic thermally conductive cantilever means interposed between and interconnecting said metallic beam collector structure and said surrounding insulative member for providing a thermally conductive path from said metallic collector structure to said surrounding insulative member, and said cantilever means extending outwardly from said collector structure to said insulative member in a direction inclined at an angle to a line along the shortest distance between said collector structure and said insulative member, whereby said cantilever means are made to flex under differential thermal expansion between said collector and said insulator to reduce transmission of thermally produced stress from said metallic collector to said surrounding insulating member to prevent fracture of said insulative member while allowing thermal conduction thereto.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1 wherein said cantilever means comprises an array of fins extending longitudinally of said hollow beam collector structure and said fins of said array being spaced apart around the circumference of said beam collector structure.
Claim 4
Dependent Claim
40 words
The apparatus of claim 2 wherein said fins extend outwardly from said beam collector structure in a direction which is approximately inclined at a angle of 45* to a radial from said beam collector structure to said surrounding insulative member.
Claim 5
Dependent Claim
49 words
The apparatus of claim 2 wherein said fins are defined by the land portions remaining between adjacent slots of said array of slots formed in the outer surface of said beam collector structure, said slots of said array of slots being directed generally longitudinally along said beam collector structure.
Claim 6
Dependent Claim
51 words
The apparatus of claim 1 wherein said cantilever means comprises an array of fins projecting outwardly from the outer surface of said beam collector structure, and means for bonding the outer extremities of said fins to the inside surrounding surface of said insulative member to provide a thermally conductive joint therebetween.
Claim 7
Dependent Claim
41 words
The apparatus of claim 2 wherein said fins have a thickness greater than the spacing between adjacent fins, whereby the array of fins provides a relatively high thermally conductive yieldable bridge between said beam collector structure and said surrounding insulator member.
Claim 8
Dependent Claim
45 words
The apparatus of claim 1 including a metallic sleeve disposed surrounding said insulative member and forming a portion of the vacuum envelope of said tube, and means for bonding the outer surface of said insulative member to the inner surface of saiD surrounding metallic sleeve.
Claim 9
Dependent Claim
39 words
The apparatus of claim 3 wherein said surrounding insulative member is ceramic, and means for bonding the outer extremities of said fins to the inside surrounding surface of said ceramic insulative member to provide a thermally conductive joint therebetween.
Claim 10
Dependent Claim
39 words
An apparatus of claim 4 wherein said surrounding insulative member is ceramic, and means for bonding the outer extremities of said fins to the inside surrounding surface of said ceramic insulative member to provide a thermally conductive joint therebetween.
References Cited (Backward Citations)
US3098165A
Cited
US3359451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |