US3612944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam scanner having plural coded dynode electrodes
Assignee: Northrop Grumman Corp
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Filing: 1969-06-30
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Granted: 1971-10-12
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Expires: 1989-06-30
Abstract
Abstract An electron beam scanner includes a flat electron emitting cathode and a flat target plate, between which are sandwiched a plurality of dynode members for controlling an electron beam between these two members. This electron beam is controlled by means of a digital addressing signal fed to the dynode members in accordance with information to be displayed. Each flat dynode member has a first set of electrodes arranged on one broad surface thereof in accordance with a first predetermined coded finger pattern and a second set of electrodes arranged on the opposite broad surface thereof in accordance with a second predetermined finger pattern. The oppositely located electrode portions on each dynode are polarized in response to digital control signals to address the electron beam to a single portion of the target plate at a time.
Inventors
- 👤 Stanley C Requa
- 👤 Farrell A Mccann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:16
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/467; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/243
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
In an electron beam scanner having an electron source, a target plate and means for accelerating the flow of electrons between said electron source and said target plate, the improvement comprising a plurality of dynode plates positioned between said cathode and said target plate for controlling the flow of electrons therebetween, said dynode plates each including: a first plurality of parallel electrodes arranged in a finger pattern on one side thereof, a second plurality of parallel electrodes arranged in a finger pattern on the side opposite said one side thereof, each of said dynode plates having a plurality of apertures formed therein for channeling the flow of electrons between said cathode and said target plate, the apertures of said plates being aligned to form channels and means for selectively applying voltage potentials between the electrodes on said one side and the other side so as to permit an electron beam to pass through only one of the channels at a time.
Claim 2
Dependent Claim
161 words
In an electron beam scanner having an electron source, a target plate and means for accelerating the flow of electrons between said electron source and said target plate, the improvement comprising a plurality of dynode plates positioned between said cathode and said target plate for controlling the flow of electrons therebetween, said dynode plates each including: a first plurality of parallel electrodes arranged in a finger pattern on one side thereof, a second plurality of parallel electrodes arranged in a finger pattern on the side opposite said one side thereof, each of said dynode plates having a plurality of apertures formed therein for channeling the flow of electrons between said cathode and said target plate, the apertures of said plates being aligned to form channels and means for selectively applying voltage potentials between the electrodes on said one side and the other side so as to permit an electron beam to pass through only one of the channels at a time.
Claim 3
Dependent Claim
24 words
The scanner of claim 1 wherein the finger patterns of said first and second electrodes are similar but positioned in a mutually orthogonal relationship.
Claim 4
Dependent Claim
25 words
The scanner of claim 2 wherein each of said first and second electrodes are in the form of strips arranged in side by side relationship.
Claim 5
Dependent Claim
132 words
In a scanner having an electron source, a target plate, means for accelerating the flow of electrons between said source of said plate, and a plurality of dynode for controlling said flow of electrons, each of said dynodes comprising a substrate plate of insulating material, a plurality of electrodes deposited on one of the broad surfaces of said substrate plate, said electrodes being arranged in a finger pattern, a plurality of electrodes deposited on the broad surface of said substrate plate opposite to said one surface thereof, said dynodes having apertures formed therein defining electron beam channels, and means for selectively applying voltage potentials between the electrodes on opposite sides of each of said dynodes so as to permit an electron beam to pass through one of said channels at a time.
Claim 6
Dependent Claim
132 words
In a scanner having an electron source, a target plate, means for accelerating the flow of electrons between said source of said plate, and a plurality of dynode for controlling said flow of electrons, each of said dynodes comprising a substrate plate of insulating material, a plurality of electrodes deposited on one of the broad surfaces of said substrate plate, said electrodes being arranged in a finger pattern, a plurality of electrodes deposited on the broad surface of said substrate plate opposite to said one surface thereof, said dynodes having apertures formed therein defining electron beam channels, and means for selectively applying voltage potentials between the electrodes on opposite sides of each of said dynodes so as to permit an electron beam to pass through one of said channels at a time.
Claim 7
Dependent Claim
22 words
The scanner of claim 4 wherein the electrodes on any one of said broad surfaces are in the form of parallel strips.
Claim 8
Dependent Claim
37 words
The scanner of claim 5 wherein the finger pattern of the electrodes on said one broad surface is similar to the finger pattern of the electrodes on the opposite surface thereof but positioned in orthogonal relationship thereto.
References Cited (Backward Citations)
US3408532A
Cited
US3505559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |