US3872339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-position character display panel
Assignee: Unisys Corp
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Filing: 1972-10-03
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Granted: 1975-03-18
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Expires: 1992-10-03
Abstract
Abstract The display panel is gas-filled and includes a base plate on which a plurality of groups of cathodes and their conductors are formed, each group of cathodes being operable to display a character. The panel also includes a face plate, spaced from the base plate, and carrying transparent conductive anodes, each associated with one group of cathodes. The panel includes a tubulation secured to the base plate through which gas and mercury vapor are introduced into the panel through a hole in the panel base plate. A mass of fibrous material is disposed in the tubulation adjacent to the hole in the base plate to prevent globules of free mercury from entering the panel and, at the same time, permitting mercury vapor to enter the panel.
Inventors
- 👤 Thomas C Maloney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:57
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/02; H01J17/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A display device comprising a gas-filled panel-like envelope including a base plate and a face plate spaced therefrom, at least one anode and one cathode electrode within said envelope, a hole in said base plate for permitting gas to leave and enter said envelope, a tubulation secured to said base plate and enclosing said hole, a mass of mercury in said tubulation, and a mass of fibrous material in said tubulation and positioned to block said hole, said mass permitting the flow of gas and mercury vapor into said envelope through said hole, but preventing the entry of relatively large globules of mercury through said hole into said envelope.
Claim 2
Dependent Claim
109 words
A display device comprising a gas-filled panel-like envelope including a base plate and a face plate spaced therefrom, at least one anode and one cathode electrode within said envelope, a hole in said base plate for permitting gas to leave and enter said envelope, a tubulation secured to said base plate and enclosing said hole, a mass of mercury in said tubulation, and a mass of fibrous material in said tubulation and positioned to block said hole, said mass permitting the flow of gas and mercury vapor into said envelope through said hole, but preventing the entry of relatively large globules of mercury through said hole into said envelope.
Claim 3
Dependent Claim
14 words
The device defined in claim 1 wherein said mass is of an insulating material.
Claim 4
Dependent Claim
12 words
The device defined in claim 1 wherein said mass is of metal.
Claim 5
Dependent Claim
17 words
The device defined in claim 1 wherein said mass is in the form of a flat disc.
Claim 6
Dependent Claim
16 words
The device defined in claim 1 wherein said mass includes a portion positioned within said hole.
Claim 7
Dependent Claim
116 words
A display device comprising a gas-filled envelope including a base plate and a face plate, a plurality of grOups of cathode electrodes disposed in said envelope on said base plate, an anode electrode in operative relation with each said group of cathode electrodes, a tubulation secured to said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate, said tubulation being adapted for introducing gas and mercury vapor into said panel through said hole in said base plate, and a mass of fibrous material disposed across said hole in said tubulation and adapted to block the passage of foreign material through said hole into said panel.
Claim 8
Dependent Claim
116 words
A display device comprising a gas-filled envelope including a base plate and a face plate, a plurality of grOups of cathode electrodes disposed in said envelope on said base plate, an anode electrode in operative relation with each said group of cathode electrodes, a tubulation secured to said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate, said tubulation being adapted for introducing gas and mercury vapor into said panel through said hole in said base plate, and a mass of fibrous material disposed across said hole in said tubulation and adapted to block the passage of foreign material through said hole into said panel.
References Cited (Backward Citations)
US3828218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |