US3599027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display discharge tube having improved display substrate and method of making same
Assignee: Japan Radio Co Ltd
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Filing: 1970-02-24
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Granted: 1971-08-10
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Expires: 1990-02-24
Abstract
Abstract A display substrate includes a display plate having mutually separated, integral projecting symbol segments formed thereon by a press-forming technique. A metallic layer is provided on the raised surfaces of the segments to form the luminous cathodes representing the symbol segments. Electrical connection of the metallic layers to an energizing source is made by means of pins extending through the segments and the plate, the upper surfaces of the pins being in the same plane as the raised surface of its respective segment.
Inventors
- 👤 Michio Koshizuka
- 👤 Shinetou Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:39
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/491
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
In a display gas discharge tube, a display substrate (8) comprising: a display plate (14) having at least one symbol segment (10, 11) projecting from a surface thereof, said symbol segment (10, 11) being integral with said display plate; and a metallic layer (15) on the surface of said at least one projecting segment remote from said surface of said display plate from which said segment projects, said metallic layer serving as a cathode electrode for said display gas discharge tube.
Claim 2
Dependent Claim
81 words
In a display gas discharge tube, a display substrate (8) comprising: a display plate (14) having at least one symbol segment (10, 11) projecting from a surface thereof, said symbol segment (10, 11) being integral with said display plate; and a metallic layer (15) on the surface of said at least one projecting segment remote from said surface of said display plate from which said segment projects, said metallic layer serving as a cathode electrode for said display gas discharge tube.
Claim 3
Dependent Claim
64 words
The tube according to claim 1 comprising a plurality of mutually separated symbol segments projecting from said surface of said display plate, said segments being integral with said display plate; and a metallic layer on the surface of each projecting segment remote from said surface of said display plate from which said segments project, said metallic layer serving as cathode electrodes for said tube.
Claim 4
Dependent Claim
95 words
The tube according to claim 1 wherein at least one lead pin hole (12) is provided in said display substrate extending through said at least one projecting segment and through said display plate, said display substrate further comprising at least one lead pin (13) located in said at least one lead pin hole (12), the upper surface of said at least one lead pin extending to said remote surface of said at least one projecting segment and the upper surface of said lead pin contacting the metallic layer on said at least one projecting segment.
Claim 5
Dependent Claim
64 words
The tube according to claim 2 comprising a plurality of lead pin holes in said substrate, at least one hole extending through each segment and through said display plate, and a plurality of lead pins located in respective lead pin holes, the upper surFace of said lead pins extending to the remote surfaces of respective segments and contacting the metallic layer on respective segments.
Claim 6
Dependent Claim
33 words
The tube according to claim 3 wherein the upper surface of said at least one lead pin is in the same plane as said remote surface of said at least one projecting segment.
Claim 7
Dependent Claim
32 words
A display gas discharge tube as claimed in claim 3 wherein said lead pin is press fit within at least a portion of the lead pin hole within which it is located.
Claim 8
Dependent Claim
47 words
A tube according to claim 3 wherein said at least one lead pin hole has a funnel-shaped portion opening towards said remote surface of said at least one projecting segment and wherein the upper portion of said at least one lead pin has a mating funnel shape.
Claim 9
Dependent Claim
40 words
A display gas discharge tube as claimed in claim 7 wherein the nonfunnel-shaped portion of said lead pin is press fit within at least a portion of the nonfunnel-shaped portion of the lead pin hole within which it is located.
Claim 10
Dependent Claim
61 words
The tube according to claim 3 comprising a sealed tube envelope (1); a plurality of lead wires (5) extending therefrom; an anode electrode (9); means (7) supporting said anode electrode (9) and said display substrate (8); and means electrically coupling said at least one pin (13) to said lead wires (5) to enable energization of said at least one cathode electrode.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |