US3735180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data display device of the gas discharge type
Assignee: Thales SA
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Filing: 1971-09-22
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Granted: 1973-05-22
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Expires: 1991-09-22
Abstract
Abstract A gas discharge type data display device is formed of a stack of alternately conductive and insulating elements for localizing the discharge by proper potential distribution, the control of which is effected by a conductive screen electrode positioned between anode and cathode. Discharge is confined in a plurality of cavities provided in said stack. The device permits a storage of data in said cavities for an indefinite period of time.
Inventors
- 👤 M Coulon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:44
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/491; G; G09; G09F; G09F9/00; G09F9/30; G09F9/313
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
In a data display device of the gas discharge type, the combination comprising A. at least one anode, B. a plurality of cathodes separated from one another and from said anode, C. means for applying voltages separately to each cathode, D. means defining a plurality of cavities, each containing one of said cathodes for confining the discharge within as many independent volumes as there are cathodes and E. means disposed between said cathodes on the one hand and said anode on the other hand for forming, together with said cathodes and said anode, an intrinsic memory in said device to store data therein for an indefinIte period of time, said lastnamed means including 1. a screen electrode and 2. insulating elements disposed between said cathodes and said screen electrode and between said screen electrode and said anode.
Claim 2
Dependent Claim
137 words
In a data display device of the gas discharge type, the combination comprising A. at least one anode, B. a plurality of cathodes separated from one another and from said anode, C. means for applying voltages separately to each cathode, D. means defining a plurality of cavities, each containing one of said cathodes for confining the discharge within as many independent volumes as there are cathodes and E. means disposed between said cathodes on the one hand and said anode on the other hand for forming, together with said cathodes and said anode, an intrinsic memory in said device to store data therein for an indefinIte period of time, said lastnamed means including 1. a screen electrode and 2. insulating elements disposed between said cathodes and said screen electrode and between said screen electrode and said anode.
Claim 3
Dependent Claim
18 words
insulating elements disposed between said cathodes and said screen electrode and between said screen electrode and said anode.
Claim 4
Dependent Claim
18 words
insulating elements disposed between said cathodes and said screen electrode and between said screen electrode and said anode.
Claim 5
Dependent Claim
99 words
An improvement as defined in claim 1, wherein said anode and said screen electrode are formed as metal plates positioned over the plurality of said cathodes in a superposed relationship, said insulating elements are constituted by a first insulator plate disposed between said cathodes and said screen electrode and by a second insulator plate disposed between said screen electrode and said anode, each metal plate and each insulator plate is provided with a plurality of openings in an arrangement and configuration corresponding to those of said cathodes, the openings in different plates are in alignment to define said cavities.
Claim 6
Dependent Claim
31 words
An improvement as defined in claim 2, wherein the openings in said insulator plates have a straight section smaller than the straight section of the corresponding openings in said metal plates.
Claim 7
Dependent Claim
17 words
An improvement as defined in claim 2, wherein said insulator plates are made of a refractory material.
References Cited (Backward Citations)
US3559190A
Cited
US3641383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |