US3939376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alignment spring counteracting antenna type getter effect on electron gun alignment
Assignee: SAES Getters SpA
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Filing: 1974-12-26
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Granted: 1976-02-17
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Expires: 1994-12-26
Abstract
Abstract A picture tube containing an electron gun assembly and an attached antenna type getter is provided which a spring like support member to maintain axial alignment of the electron gun assembly in the picture tube.
Inventors
- 👤 Clair W. Reash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:44
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
In a picture tube having a cylindrical neck portion and a conical funnel portion and containing an electron gun assembly including a glass header member adapted to seal the neck portion, a cylindrical metal cup member said cup member being held centrally spaced in said neck portion by peripherally attached spring members, a getter assembly attached to said cup member by an elongated spring member which forcibly holds said getter assembly against the funnel portion of said tube and imparts a rotational force on said electron gun assembly, the improvement which comprises at least one spring member attached to said cup member and extending toward said header member and forcibly contacting said neck portion of said picture tube and imparting a force on said electron gun assembly which substantially balances said rotational force due to said elongated spring member attached to said getter assembly, said peripherally attached spring members compensating for the increased force applied to the electron gun assembly by said spring member attached to said cup member to maintain said electron gun in axial alignment in said neck portion of said picture tube.
Claim 2
Dependent Claim
185 words
In a picture tube having a cylindrical neck portion and a conical funnel portion and containing an electron gun assembly including a glass header member adapted to seal the neck portion, a cylindrical metal cup member said cup member being held centrally spaced in said neck portion by peripherally attached spring members, a getter assembly attached to said cup member by an elongated spring member which forcibly holds said getter assembly against the funnel portion of said tube and imparts a rotational force on said electron gun assembly, the improvement which comprises at least one spring member attached to said cup member and extending toward said header member and forcibly contacting said neck portion of said picture tube and imparting a force on said electron gun assembly which substantially balances said rotational force due to said elongated spring member attached to said getter assembly, said peripherally attached spring members compensating for the increased force applied to the electron gun assembly by said spring member attached to said cup member to maintain said electron gun in axial alignment in said neck portion of said picture tube.
References Cited (Backward Citations)
US2877370A
Cited
US3508105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |