US3796904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colour picture tubes
Assignee: Hitachi Ltd
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Filing: 1972-10-31
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Granted: 1974-03-12
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Expires: 1992-10-31
Abstract
Abstract In a colour picture tube including a colour selection electrode assembly mounted on a panel close to a fluorescent screen, there are provided a plurality of projections on the inner surface of the vertical edge wall of the panel. Each projection is formed with a groove which is partially filled with a filler member to define a recess which is adapted to receive a mounting member of the colour selection tube.
Inventors
- 👤 M Yamauchi
- 👤 Y Takezawa
- 👤 K Koizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J29/073
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
In a colour picture tube comprising a neck containing an electron gun assembly, a panel including a fluorescent screen, a colour selection electrode structure disposed close to said fluOrescent screen, and a funnel interconnecting said neck and said panel for completing an envelope of said colour picture tube, the improvement which comprises a plurality of projections formed on the vertical edge wall on the inside of said panel, each of said projections being provided with a groove extending in one direction to the edge of said projections; a filler member partially filling said groove and leaving a recess bounded on all sides by the walls of said groove and said filler member; mounting members on said colour selection electrode structure having a leaf spring extending adjacent each said recess; and a pin carried on the free end of each said leaf spring and urged thereby to engage said walls of said recess, said springs, pins and recesses adapted to accurately removably position said colour selection electrode structure and constrain said structure against movement in all directions relative to said panel.
Claim 2
Dependent Claim
180 words
In a colour picture tube comprising a neck containing an electron gun assembly, a panel including a fluorescent screen, a colour selection electrode structure disposed close to said fluOrescent screen, and a funnel interconnecting said neck and said panel for completing an envelope of said colour picture tube, the improvement which comprises a plurality of projections formed on the vertical edge wall on the inside of said panel, each of said projections being provided with a groove extending in one direction to the edge of said projections; a filler member partially filling said groove and leaving a recess bounded on all sides by the walls of said groove and said filler member; mounting members on said colour selection electrode structure having a leaf spring extending adjacent each said recess; and a pin carried on the free end of each said leaf spring and urged thereby to engage said walls of said recess, said springs, pins and recesses adapted to accurately removably position said colour selection electrode structure and constrain said structure against movement in all directions relative to said panel.
Claim 3
Dependent Claim
23 words
The colour picture tube according to claim 1 wherein the groove in each projection extends in parallel with the axis of said tube.
Claim 4
Dependent Claim
26 words
The colour picture tube according to claim 1 wherein the groove in each projection extends at right angles with respect to the axis of said tube.
Claim 5
Dependent Claim
39 words
The colour picture tube according to claim 2 wherein one end of said groove is opened and said filler member closes said opened end to form said recess by said filler member and the closed end of said groove.
Claim 6
Dependent Claim
33 words
The colour picture tube according to claim 3 wherein the opposite ends of said groove are opened and said opened ends are closed by spaced apart filler members to define said recess therebetween.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |