US3846662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-numberic display type electron discharge device
Assignee: General Electric Co
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Filing: 1970-06-22
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Granted: 1974-11-05
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Expires: 1990-06-22
Abstract
Abstract An improved alpha-numeric display type electron discharge device is disclosed having fluorescent coated anode segments raised slightly from a planar insulating substrate. The invention provides conducting portions surrounding the coated portions to inhibit the deleterious effects of charge buildup on the insulating substrate. The raised anode construction of the invention also prevents sublimation from the cathode from forming conducting paths on the substrate between adjacent anodes.
Inventors
- 👤 J Hooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:53
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/15
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
An alpha-numeric display type electron discharge device comprising: an evacuated envelope containing a cathode, an insulating anode support substrate, and a plurality of planar anode segments mounted on said substrate generally in one plane, each of said anode segments having a coating of fluorescent material on at least a portion of a first surface of said segment and having means on the opposite surface of said segment to space the segments from said substrate an amount that is small with respect to the lateral dimensions of said segments, said spacing means being spaced from the edges of said opposite surface.
Claim 2
Dependent Claim
100 words
An alpha-numeric display type electron discharge device comprising: an evacuated envelope containing a cathode, an insulating anode support substrate, and a plurality of planar anode segments mounted on said substrate generally in one plane, each of said anode segments having a coating of fluorescent material on at least a portion of a first surface of said segment and having means on the opposite surface of said segment to space the segments from said substrate an amount that is small with respect to the lateral dimensions of said segments, said spacing means being spaced from the edges of said opposite surface.
Claim 3
Dependent Claim
96 words
An alpha-numeric display type electron discharge device comprising: a. an evacuated envelope; b. cathode means; c. an insulated anode support substrate spaced from said cathode means; d. a plurality of planar anodes mounted on said substrate generallY in one plane spaced from said substrate; e. a coating of fluorescent material on at least a portion of a first surface of each of said anodes; f. conducting portions on each anode completely surrounding the fluorescent coating on each anode to prevent charge buildup adjacent the coating; and g. spacing means to space said anodes from said substrate.
Claim 4
Dependent Claim
96 words
An alpha-numeric display type electron discharge device comprising: a. an evacuated envelope; b. cathode means; c. an insulated anode support substrate spaced from said cathode means; d. a plurality of planar anodes mounted on said substrate generallY in one plane spaced from said substrate; e. a coating of fluorescent material on at least a portion of a first surface of each of said anodes; f. conducting portions on each anode completely surrounding the fluorescent coating on each anode to prevent charge buildup adjacent the coating; and g. spacing means to space said anodes from said substrate.
Claim 5
Dependent Claim
13 words
The device of claim 2 wherein said fluorescent coating comprises an ZnO:Zn phosphor.
Claim 6
Dependent Claim
20 words
The device of claim 2 wherein said device is operated in a low voltage range of about 10- 40 volts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |