Patent US2518370A successfully refreshed from Google Patents.
Patent US3599026A successfully refreshed from Google Patents.
US3599026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection tube with rotatable cooled display screen
Assignee: Toshiba Corp
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Filing: 1969-08-25
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Granted: 1971-08-10
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Expires: 1989-08-25
Abstract
Abstract A projection picture tube comprises a vacuum vessel, an anode support member received in said vessel, a fluorescent film coated on the upper surface of said anode member and an electron gun assembly for ejecting electron beams on said fluorescent film, said anode member consisting of a hollow metal body through which a cooling fluid is caused to flow.
Inventors
- 👤 Asahide Tsuneta
- 👤 Shinichi Sawagata
- 👤 Mikio Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:37
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H01; H01J; H01J29/00; H01J29/006; H01J29/02; H01J29/10; H01J29/18; H01J29/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
A projection picture tube comprising: an evacuated envelope having a transparent faceplate; a hollow metal anode plate member disposed in the envelope; a fluorescent film coated on one side of the hollow metal anode plate member which faces thE faceplate; a double pipe means for circulating cooling fluid into the hollow metal anode plate member extending from the other side of the hollow metal anode plate member, said double pipe means being rotatably and airtightly mounted at least partially within a casing extending through said evacuated envelope and including a coaxially arranged drain pipe and feed pipe coupling said cooling fluid into the hollow metal anode plate member; drive means for rotating said hollow metal anode plate member about its central axis, said drive means including a fluid driven motor having a plurality of rotary blades projecting substantially radially from the outer wall of the double pipe means and a blast pipe for supplying propulsive fluid to the rotary blades; an electron gun assembly disposed in the envelope for ejecting electron beams on the fluorescent film; and an optical system for enlarging the image produced on the fluorescent film by electron beams.
Claim 2
Dependent Claim
192 words
A projection picture tube comprising: an evacuated envelope having a transparent faceplate; a hollow metal anode plate member disposed in the envelope; a fluorescent film coated on one side of the hollow metal anode plate member which faces thE faceplate; a double pipe means for circulating cooling fluid into the hollow metal anode plate member extending from the other side of the hollow metal anode plate member, said double pipe means being rotatably and airtightly mounted at least partially within a casing extending through said evacuated envelope and including a coaxially arranged drain pipe and feed pipe coupling said cooling fluid into the hollow metal anode plate member; drive means for rotating said hollow metal anode plate member about its central axis, said drive means including a fluid driven motor having a plurality of rotary blades projecting substantially radially from the outer wall of the double pipe means and a blast pipe for supplying propulsive fluid to the rotary blades; an electron gun assembly disposed in the envelope for ejecting electron beams on the fluorescent film; and an optical system for enlarging the image produced on the fluorescent film by electron beams.
Claim 3
Dependent Claim
29 words
The tube according to claim 1 wherein said feed pipe is the inner of said coaxial pipes and said drain pipe is the outer of said coaxially arranged pipes.
Claim 4
Dependent Claim
30 words
The tube according to claim 1 wherein the anode plate member includes a disk member having a spiral passage therein for allowing the cooling fluid to flow in eddy currents.
Claim 5
Dependent Claim
18 words
The tube according to claim 3 comprising a drain duct coupling the spiral passage to said drain pipe.
Claim 6
Dependent Claim
26 words
The tube according to claim 1 wherein the upper surface of the fluorescent film which is impinged by electron beams is coated with an aluminum film.
Claim 7
Dependent Claim
15 words
The tube according to claim 1 wherein said fluorescent film is a color fluorescent film.
Claim 8
Dependent Claim
65 words
The tube according to claim 6 wherein the fluorescent film is divided into six sections of equal area separated by partition bands extending substantially radially at equal angles from the center of said film, and said six sections being formed into two groups, each group comprising three sections prepared from fluorescent materials projecting blue, red and green light beams and arranged in the order mentioned.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |