US4163889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the simultaneous operation of a number of gas discharge electron guns
Assignee: US Philips Corp
•
Filing: 1976-12-17
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Granted: 1979-08-07
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Expires: 1996-12-17
Abstract
Abstract A device for the simultaneous operation of a number of gas discharge electron guns in which electron beams produced by the guns have different intensities due to different diameters of discharge spaces and/or due to a different anode-cathode distance.
Inventors
- 👤 Theodorus M. B. Schoenmakers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:35
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/06; H01J37/077
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A low pressure high voltage glow discharge device for simultaneously generating at least two beams of charged particles having different current intensities, comprising an envelope, a plurality of electron gun assemblies each including an anode and a cathode arranged at a distance from one another, the anodes and cathodes defining separate discharge spaces which communicate with said envelope, said discharge spaces having different volumes, means for maintaining substantially equal pressures in said discharge spaces and means for applying the same voltage to at least two of said electron gun assemblies, said two electron gun assemblies having substantially the same electrode geometry.
Claim 2
Dependent Claim
101 words
A low pressure high voltage glow discharge device for simultaneously generating at least two beams of charged particles having different current intensities, comprising an envelope, a plurality of electron gun assemblies each including an anode and a cathode arranged at a distance from one another, the anodes and cathodes defining separate discharge spaces which communicate with said envelope, said discharge spaces having different volumes, means for maintaining substantially equal pressures in said discharge spaces and means for applying the same voltage to at least two of said electron gun assemblies, said two electron gun assemblies having substantially the same electrode geometry.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1, wherein the distance between the anode and the cathode in said two gas discharge electron guns is different.
Claim 4
Dependent Claim
12 words
The device of claim 1 wherein said discharge spaces have different diameters.
Claim 5
Dependent Claim
24 words
The device of claim 1 wherein said anodes are hollow, and said discharge spaces communicate with said envelope by way of said hollow anodes.
Claim 6
Dependent Claim
35 words
The discharge device of claim 1 wherein said means for maintaining substantially equal pressure comprises means for maintaining pressures within said discharge spaces of between 10 -1 and 10 -2 Torr was in said envelope.
Claim 7
Dependent Claim
21 words
The device of claim 1 further comprising common power supply for applying the same voltage to said two electron gun assemblies.
References Cited (Backward Citations)
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Cited
US3265801A
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US3054896A
Cited
US3566184A
Cited
US3486064A
Cited
US3770934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-06 | 1983-02-05 | 1983-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-06 | 1987-02-05 | 1987-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-06 | 1991-02-05 | 1991-08-07 | $7700.00 | Window Closed / Lapsed |