US3603837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual display devices
Assignee: Individual
•
Filing: 1969-10-27
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Granted: 1971-09-07
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Expires: 1989-10-27
Abstract
Abstract A display device comprises a plurality of gas-filled discharge devices arranged in a two-coordinate array. The discharge devices are formed in a plurality of cavities in a block, one end of each cavity being filled with an electrically resistive material and the remainder being filled with gas. Two sets of conductors are formed on the opposite surfaces of the block to enable any selected discharge device to be activated by the energization of the appropriate pair of coordinate conductors.
Inventors
- 👤 George Christie Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
A visual display device of the type comprising a plurality of gas-filled discharge devices arranged in a two-coordinate array, which includes a block of material containing a plurality of cavities, at least the surface of the block including the surfaces of the cavities being electrically insulating, an electrically resistive material located wholly within each cavity at and filling one end thereof, said material having a coefficient of thermal expansion substantially equal to that of the block and a resistivity in the range from 104 to 2 X 105 ohm-centimeters, a gas filling the remainder of each cavity, means for sealing said cavities against the escape of gas therefrom, a first set of electrical conductors each interconnecting one end of each cavity associated with a particular value of one coordinate, and a second set of electrical conductors each interconnecting the other end of each cavity associated with a particular value of the other coordinate.
Claim 2
Dependent Claim
153 words
A visual display device of the type comprising a plurality of gas-filled discharge devices arranged in a two-coordinate array, which includes a block of material containing a plurality of cavities, at least the surface of the block including the surfaces of the cavities being electrically insulating, an electrically resistive material located wholly within each cavity at and filling one end thereof, said material having a coefficient of thermal expansion substantially equal to that of the block and a resistivity in the range from 104 to 2 X 105 ohm-centimeters, a gas filling the remainder of each cavity, means for sealing said cavities against the escape of gas therefrom, a first set of electrical conductors each interconnecting one end of each cavity associated with a particular value of one coordinate, and a second set of electrical conductors each interconnecting the other end of each cavity associated with a particular value of the other coordinate.
Claim 3
Dependent Claim
22 words
A display device as claimed in claim 1 in which the block containing the cavities is made from an electrically insulating material.
Claim 4
Dependent Claim
56 words
A display device as claimed in claim 1 in which the block containing the cavities is formed in two parts each having a like pattern of cavities, all the cavities in one part being filled with the electrically resistive material and said two parts being sealed together with the cavities in register to form the block.
Claim 5
Dependent Claim
29 words
A display device as claimed in claim 1 in which an electrode surface is formed in each cavity at the interface between the electrically resistive material and the gas.
Claim 6
Dependent Claim
26 words
A display device as claimed in claim 4 in which the electrode surface comprises a layer of a nickel-chromium alloy covered with a layer of chromium.
Claim 7
Dependent Claim
19 words
A display device as claimed in claim 1 in which the electrically resistive material is an electronically conducting glass.
Claim 8
Dependent Claim
24 words
A display device as claimed in claim 6 in which the glass has vanadium pentoxide as a major constituent in terms of mole percentage.
Claim 9
Dependent Claim
31 words
A display device as claimed in claim 6 in which the glass has the composition 60 mole percent vanadium pentoxide, 30 mole percent zinc oxide and 10 mole percent boric oxide.
Claim 10
Dependent Claim
31 words
A display device as claimed in claim 6 in which the glass has the composition 75 mole percent vanadium pentoxide, 20 mole percent phosphorous pentoxide and 7 mole percent ferric oxide.
Claim 11
Dependent Claim
18 words
A display device as claimed in claim 6 in which the glass comprises a lead borosilicate-thallium oxide mixture.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |