US3906282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision getter alignment for cathode ray tubes
Assignee: RCA Licensing Corp
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Filing: 1974-02-19
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Granted: 1975-09-16
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Expires: 1994-02-19
Abstract
Abstract In a cathode ray tube a getter assembly, supported from the electron gun assembly, is precisely positioned within the tube by use of a locating channel formed in the side wall of a metallic, generally cup-shaped end member of the electron gun assembly. This allows consistent alignment with a coil energized by radio frequency current and situated outside the tube, but adjacent thereto, to heat and evaporate getter material within the tube. The channel may be formed by inwardly piercing two parallel slots in the end member and employing the introverted metal to restrain the getter support member.
Inventors
- 👤 Elliott M Krackhardt
- 👤 William J Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:24
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/94
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
In a cathode ray tube including electron gun means for producing at least one beam of electrons, generally cup-shaped apparatus situated at the end of said electron gun means from which said electrons are emergent, said generally cup-shaped apparatus including a side wall, and means located within said tube for gettering gases therein, apparatus for retaining said means for gettering gases in precise alignment on a radial axis of said tube comprising: a predetermined configuration of getter material; a channel formed longitudinally in the side wall of said generally cup-shaped apparatus, said channel including sides formed by introverted segments of said side wall and a web portion formed by the portion of said side wall situated between said segments, and a member supporting said configuration of getter material, said member being positioned within said channel and affixed to said generally cup-shaped apparatus so as to extend toward a predetermined location in said tube.
Claim 2
Dependent Claim
153 words
In a cathode ray tube including electron gun means for producing at least one beam of electrons, generally cup-shaped apparatus situated at the end of said electron gun means from which said electrons are emergent, said generally cup-shaped apparatus including a side wall, and means located within said tube for gettering gases therein, apparatus for retaining said means for gettering gases in precise alignment on a radial axis of said tube comprising: a predetermined configuration of getter material; a channel formed longitudinally in the side wall of said generally cup-shaped apparatus, said channel including sides formed by introverted segments of said side wall and a web portion formed by the portion of said side wall situated between said segments, and a member supporting said configuration of getter material, said member being positioned within said channel and affixed to said generally cup-shaped apparatus so as to extend toward a predetermined location in said tube.
Claim 3
Dependent Claim
14 words
The combination of claim 1 wherein said member is welded to said web portion.
Claim 4
Dependent Claim
25 words
The combination of claim 1 wherein said member is of predetermined length, one end of said member abutting the base of said generally cup-shaped apparatus.
Claim 5
Dependent Claim
14 words
The combination of claim 3 wherein said member is welded to said web portion.
Claim 6
Dependent Claim
155 words
In a cathode ray tube including electron gun means for producing at least one beam of electrons, generally cup-shaped apparatus situated at the end of said electron gun means from which said electrons are emergent, said generally cup-shaped apparatus including a side wall, and means located within said tube for gettering means therein, apparatus for retaining said means for gettering gases in precise alignment on a radial axis of said tube comprising: a predetermined configuration of getter material; a channel formed longitudinally in the side wall of said generally cup-shaped apparatus, said channel including sides formed by introverted segments of a web portion formed by the portion of said side wall situated between two, substantially parallel slots in said side wall; and a member supporting said configuration of getter material, said member being positioned within said channel and affixed to said generally cup-shaped apparatus so as to extend toward a predetermined location in said tube.
Claim 7
Dependent Claim
155 words
In a cathode ray tube including electron gun means for producing at least one beam of electrons, generally cup-shaped apparatus situated at the end of said electron gun means from which said electrons are emergent, said generally cup-shaped apparatus including a side wall, and means located within said tube for gettering means therein, apparatus for retaining said means for gettering gases in precise alignment on a radial axis of said tube comprising: a predetermined configuration of getter material; a channel formed longitudinally in the side wall of said generally cup-shaped apparatus, said channel including sides formed by introverted segments of a web portion formed by the portion of said side wall situated between two, substantially parallel slots in said side wall; and a member supporting said configuration of getter material, said member being positioned within said channel and affixed to said generally cup-shaped apparatus so as to extend toward a predetermined location in said tube.
Claim 8
Dependent Claim
14 words
The combination of claim 5 wherein said member is welded to said web portion.
Claim 9
Dependent Claim
25 words
The combination of claim 5 wherein said member is of predetermined length, one end of said member abutting the base of said generally cup-shaped apparatus.
Claim 10
Dependent Claim
14 words
The combination of claim 7 wherein said member is welded to said web portion.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |