US3758714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ay multiple gun rotatable television projector head for 360 degree displ
Assignee: United States Department of the Navy
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Filing: 1972-07-11
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Granted: 1973-09-11
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Expires: 1992-07-11
Abstract
Abstract A rotating television projection tube includes multiple projection guns within a single envelope and thereby provides multiple projection beams. Each beam repeatedly produces a single stroke scan line which, when projected vertically on a 360* projection screen, and when moved horizontally by rotating the tube causes a continuous television raster to be generated through 360*.
Inventors
- 👤 J Herndon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:22
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A television projection head for providing 360* panoramic projection on a surrounding projection screen, said head comprising: frame means; an envelope mounted for rotation with respect to said frame means about a vertical axis; drive means for rotating said envelope; a plurality of electron guns disposed within said envelope in equispaced relation about said axis and with their principal axis parallel thereto; phosphor coated screen means disposed in the path of electron beams from said guns; a plurality of reflecting means, each disposed to reflect radially outwardly light emitted by said phosphor coated screen means when scanned by the electron beam from a respective one of said guns; and a plurality of projection lens means, each associated with one of said reflecting means, for focusing said reflected light upon a screen whereby radial single line scans of said phosphor coated screen means by each of said guns will produce a raster of substantially vertical line scans on said projection screen as said head is rotated by said drive means.
Claim 2
Dependent Claim
169 words
A television projection head for providing 360* panoramic projection on a surrounding projection screen, said head comprising: frame means; an envelope mounted for rotation with respect to said frame means about a vertical axis; drive means for rotating said envelope; a plurality of electron guns disposed within said envelope in equispaced relation about said axis and with their principal axis parallel thereto; phosphor coated screen means disposed in the path of electron beams from said guns; a plurality of reflecting means, each disposed to reflect radially outwardly light emitted by said phosphor coated screen means when scanned by the electron beam from a respective one of said guns; and a plurality of projection lens means, each associated with one of said reflecting means, for focusing said reflected light upon a screen whereby radial single line scans of said phosphor coated screen means by each of said guns will produce a raster of substantially vertical line scans on said projection screen as said head is rotated by said drive means.
Claim 3
Dependent Claim
43 words
A television projection head as defined in claim 1 and further comprising: means for moving said phosphor coated screen means at a predetermined rate which will prevent damage to said phosphor coated screen means by repetitive single line sweeps by said electron beams.
Claim 4
Dependent Claim
58 words
A television projection head as defined in claim 2, and wherein: SAID envelope is substantially cylindrical in shape, said axis being the central axis thereof; and said phosphor coated screen means comprises a transparent disc lying in a plane normal to said axis of said envelope and having an electron beam excitable phosphor coating facing said electron guns.
Claim 5
Dependent Claim
50 words
A television projection head as defined in claim 3, and wherein: said means for moving said phosphor coated screen means comprises a shaft extending coaxial with the axis of said envelope and supporting said disc; and bearing means for supporting said shaft for rotation of said disc about said axis.
Claim 6
Dependent Claim
34 words
A television projection head as defined in claim 4, and wherein: said means for moving said phosphor coated screen means further comprises electric motor means supported by said envelope and coupled to said shaft.
Claim 7
Dependent Claim
60 words
A television projection head as defined in claim 5, and further comprising: slip ring means mounted on said envelope for rotation therewith; brush means mounted on said frame means for cooperation with said slip rings; and conductor means connecting said slip ring means to said electron guns and to said electric motor means for moving said phosphor coated screen means.
Claim 8
Dependent Claim
31 words
A television projection head as defined in claim 6, and wherein: said drive means for rotating said envelope comprises an electric motor mounted on said frame and coupled to said envelope.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |