Patent US5691747A successfully refreshed from Google Patents.
US3854066A
Expired / Lapsed
US
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Electron device incorporating a microchannel secondary emitter
Assignee: United States Department of the Army
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Filing: 1973-11-21
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Granted: 1974-12-10
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Expires: 1993-11-21
Abstract
Abstract An electron device incorporating a microchannel plate as a secondary emission electron source which in addition to the primary current provided by an electron emitter, such as a thermionic emitter, will provide high gains. By impressing the proper voltages thereon, the entrance and exit surfaces of the microchannel plate serve respectively as equivalents to the control grid and screen grid in a conventional type tube.
Inventors
- 👤 W Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/023; H01J21/00; H01J21/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
134 words
A high gain electron device comprising: a planar surface electron source having means associated therewith for causing electrons to be emitted therefrom; a microchannel plate having parallel conductive entrance and exit faces positioned proximate said surface with said entrance face and said planar surface in parallel relationship; anode means positioned to receive electrons from the exit face of said microchannel plate; means associated with said entrance face for receiving a modulating voltage; means associated with said exit face for receiving a biasing voltage, whereby the voltages impressed upon said faces control the gain of the device by causing the entrance and exit faces to function as a control grid and screen grid respectively; and a suppressor grid located between said exit face and anode for preventing anode electrons from returning to said exit face.
Claim 2
Dependent Claim
134 words
A high gain electron device comprising: a planar surface electron source having means associated therewith for causing electrons to be emitted therefrom; a microchannel plate having parallel conductive entrance and exit faces positioned proximate said surface with said entrance face and said planar surface in parallel relationship; anode means positioned to receive electrons from the exit face of said microchannel plate; means associated with said entrance face for receiving a modulating voltage; means associated with said exit face for receiving a biasing voltage, whereby the voltages impressed upon said faces control the gain of the device by causing the entrance and exit faces to function as a control grid and screen grid respectively; and a suppressor grid located between said exit face and anode for preventing anode electrons from returning to said exit face.
Claim 3
Dependent Claim
23 words
The high gain electron device according to claim 1 wherein said electron source and associated means comprise an indirectly heated planar thermionic emitter.
References Cited (Backward Citations)
US3790840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |