US3735183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous discharge display device with a layer of electrically resistive material
Assignee: Ferranti International PLC
•
Filing: 1971-05-19
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Granted: 1973-05-22
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Expires: 1991-05-19
Abstract
Abstract A visual display device incorporates an array of direct-current discharge devices. A block of electrically insulating material has a plurality of gas-filled cavities, each forming a discharge space for one discharge device, or a single gas-filled cavity common to all discharge devices. A plurality of transparent anode conductors on a face of a second block of electrically insulating material, sealed to the first block, and in registration with the cavities, form anode electrodes for one co-ordinate of the array. Cathode electrodes are carried by a face of a third block of electrically insulating material, also sealed to the first block, and those cathode electrodes of the other co-ordinate of the array are connected by way of electrically resistive material to one of a plurality of cathode conductors. The cathode conductors, which are isolated from the discharge space or spaces, cathode electrodes and electrically resistive material are all carried on said face of the third block.
Inventors
- 👤 F Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
26 words
A visual display device as claimed in claim 1 in which each second electrode is stacked over a further conductor associated with an adjacent second electrode.
Claim 2
Dependent Claim
45 words
A visual display device as claimed in claim 1 in which the layers of electrically resistive material connecting each second electrode to one further conductor of each of a plurality of sets are stacked one above the other and are separated by electrically insulating material.
Claim 3
Dependent Claim
29 words
A visual display device as claimed in claim 1 in which the discharge spaces in the first block comprise a plurality of cavities arranged in a two co-ordinate array.
Claim 4
Dependent Claim
58 words
A visual display device as claimed in claim 4 in which each conductor on the second block forms an electrode for each cavity associated with one co-ordinate of the array and each one of the, or each set of, further conductors is connected to the second electrodes associated with the cavities of the other co-ordinate of the array.
Claim 5
Dependent Claim
24 words
A visual display device as claimed in claim 1 in which the first, second and third blocks are of the same electrically insulating material.
Claim 6
Dependent Claim
17 words
A visual display device as claimed in claim 6 in which the electrically insulating material is glass.
Claim 7
Dependent Claim
18 words
A visual display device as claimed in claim 1 in which the electrically resistive material is thallium oxide.
Claim 8
Dependent Claim
18 words
A visual display device as claimed in claim 1 in which the electrically resistive material is ruthenium dioxide.
Claim 9
Dependent Claim
19 words
A visual display device as claimed in claim 1 in which the conductors on the second block are transparent.
Claim 10
Dependent Claim
18 words
A visual display device as claimed in claim 10 in which the transparent conductors are of stannic oxide.
Claim 11
Dependent Claim
20 words
A visual display device as claimed in claim 1 in which the further conductors are of chromium plated with gold.
Claim 12
Dependent Claim
181 words
A visual display device incorporating an array of direct-current discharge devices comprising one or more gas filled discharge spaces formed between a first and a second block of electrically insulating material, a set of electrical conductors on the face of the first block adjacent the discharge space or spaces, each conductor forming a first electrode of at least one of said discharge devices, means for sealing said second block of electrically insulating material to the first block, a plurality of second electrodes, one for each of said discharge devices, carried by a face of the second block adjacent the discharge space or spaces, at least one set of further electrical conductors on said face of the second block, said further electrical conductors being electrically isolated from each discharge space, a layer of electrically resistive material, carried by said face of the second block and connecting each second electrode to a selected one of the, or each, set of further conductors and a layer of insulating material covering the resistive material and each further conductor on the surface of the second block.
Claim 13
Dependent Claim
60 words
A visual display device as claimed in claim 13 in which the second electrodes, further conductors and electrically resistive material are all formed on the surface of the second block, said layer of insulating material extending to said face of said second block between each said second electrodes and the adjacent one of the, or each, set of further conductors.
Claim 14
Dependent Claim
23 words
A visual display device as claimed in claim 13 including spacer means between said first and said second block defining said discharge spaces.
Claim 15
Dependent Claim
29 words
A visual display device as set forth in claim 15 wherein said spacer means comprise built up insulative wall sections covering the electrically resistive material and each further section.
Claim 16
Dependent Claim
31 words
A visual display device as set forth in claim 15 wherein said discharge spaces have inclined walls forming spaces of increasing cross-section extending from the second block to the first block.
Claim 17
Dependent Claim
26 words
A visual display device as claimed in claim 13 in which each second electrode is stacked over a further conductor associated with an adjacent second electrode.
Claim 18
Dependent Claim
45 words
A visual display device as claimed in claim 13 in which the layers of electrically resistive material connecting each second electrode to one further conductor of each of a plurality of sets are stacked one above the other and are separated by electrically insulating material.
Claim 19
Dependent Claim
24 words
A visual display device as claimed in claim 13 in which the discharge comprising a plurality of cavities arranged in a two co-ordinate array.
Claim 20
Dependent Claim
58 words
A visual display device as claimed in claim 19 in which each conductor on the first block forms an electrode for each cavity associated with one co-ordinate of the array and each one of the, or each set of, further conductors is connected to the second electrodes associated with the cavities of the other co-ordinate of the array.
Claim 21
Dependent Claim
75 words
A visual display device as claimed in claim 13 in which the first and second blocks are of the same electrically insulating material and in which the second electrodes, further conductors and electrically resistive material are all formed on the surface of the second block, said layer of insulating material extending to said face of said second block between each said second electrodes and the adjacent one of the, or each, set of further conductors.
Claim 22
Dependent Claim
17 words
A visual display device as claimed in claim 22 in which the electrically insulating material is glass.
Claim 23
Dependent Claim
18 words
A visual display device as claimed in claim 13 in which the electrically resistive material is thallium oxide.
Claim 24
Dependent Claim
18 words
A visual display device as claimed in claim 13 in which the electrically resistive material is ruthenium dioxide.
Claim 25
Dependent Claim
19 words
A visual display device as claimed in claim 13 in which the conductors on the second block are transparent.
Claim 26
Dependent Claim
18 words
A visual display device as claimed in claim 26 in which the transparent conductors are of stannic oxide.
Claim 27
Dependent Claim
20 words
A visual display device as claimed in claim 13 in which the further conductors are of chromium plated with gold.
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) | 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 |