US3821584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filled display device having mercury inlet shield
Assignee: Unisys Corp
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Filing: 1972-06-30
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Granted: 1974-06-28
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Expires: 1992-06-30
Abstract
Abstract The display panel comprises a gas-filled envelope which 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 envelope also includes a face plate, spaced from the base plate, and carrying transparent conductive anodes, each associated with one group of cathodes. The base plate of the panel is provided with a hole and a short, smalldiameter tube axially aligned with the hole and extending away from the outer surface of the base plate. The usual tubulation is secured to the outer surface of the base plate enclosing the hole and the short tube, and the desired gas and mercury vapor are introduced into the panel envelope through the tubulation and through the short tube and hole in the base plate. The short tube prevents large mercury globules, which might be present in the sealed-off tubulation, from accidentally getting into the panel envelope.
Inventors
- 👤 J Scovronek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:13
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
183 words
A display device comprising a generally flat panel-type envelope including a base plate and a viewing face plate hermetically sealed together, means in said envelope defining a plurality of gas-filled glow cells with an anode and cathode electrode associated with each of said glow cells, a tubulation secured to the bottom surface of said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate whereby gas can be introduced into said envelope, a quantity of mercury globules disposed within said tubulation for introduction of the vapor of a portion thereof into said envelope, some of said mercury globules remaining in said tubulation, and a short small-diameter tube secured to said base plate and having one end open and in communication with said hole therein, said tube extending from said base plate into said tubulation and having its opposite end, within said tubulation, closed, said tube having a side wall between said open end and said closed end and having a hole in said side wall between said open end and said closed end.
Claim 2
Dependent Claim
183 words
A display device comprising a generally flat panel-type envelope including a base plate and a viewing face plate hermetically sealed together, means in said envelope defining a plurality of gas-filled glow cells with an anode and cathode electrode associated with each of said glow cells, a tubulation secured to the bottom surface of said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate whereby gas can be introduced into said envelope, a quantity of mercury globules disposed within said tubulation for introduction of the vapor of a portion thereof into said envelope, some of said mercury globules remaining in said tubulation, and a short small-diameter tube secured to said base plate and having one end open and in communication with said hole therein, said tube extending from said base plate into said tubulation and having its opposite end, within said tubulation, closed, said tube having a side wall between said open end and said closed end and having a hole in said side wall between said open end and said closed end.
Claim 3
Dependent Claim
18 words
The device defined in claim 1 wherein said tube has a diameter of the order of 20 mils.
Claim 4
Dependent Claim
12 words
The device defined in claim 1 wherein said tube is of metal.
Claim 5
Dependent Claim
18 words
The device defined in claim 1 wherein said tube is secured within said hole in said base plate.
Claim 6
Dependent Claim
22 words
The device defined in claim 1 wherein said tube is secured within said hole in said base plate in axial alignment therewith.
Claim 7
Dependent Claim
32 words
The device defined in claim 1 wherein said small diameter tube has a diameter of about 20 mils and said hole in said side wall has a diameter of about 20 mils.
Claim 8
Dependent Claim
176 words
A display device comprising a generally flat panel-type envelope including a base plate and a viewing face plate hermetically sealed together, means in said envelope defining a plurality of gas-filled glow cells with an anode and cathode electrode associated with each of said glow cells, a tubulation secured to the bottom surface of said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate whereby gas can be introduced into said envelope, a quantity of mercury globules disposed within said tubulation for introduction of the vapor of a portion thereof into said envelope, some of said mercury globules remaining in said tubulation, and a short small-diameter, open-ended tube secured to said base plate and having one end open and in communication with said hole therein, said tube extending from said base plate into said tubulation, with the lower portion thereof remote from said base plate being bent at about a 90* angle to its axis and to the axis of said hole in said base plate.
Claim 9
Dependent Claim
176 words
A display device comprising a generally flat panel-type envelope including a base plate and a viewing face plate hermetically sealed together, means in said envelope defining a plurality of gas-filled glow cells with an anode and cathode electrode associated with each of said glow cells, a tubulation secured to the bottom surface of said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate whereby gas can be introduced into said envelope, a quantity of mercury globules disposed within said tubulation for introduction of the vapor of a portion thereof into said envelope, some of said mercury globules remaining in said tubulation, and a short small-diameter, open-ended tube secured to said base plate and having one end open and in communication with said hole therein, said tube extending from said base plate into said tubulation, with the lower portion thereof remote from said base plate being bent at about a 90* angle to its axis and to the axis of said hole in said base plate.
Claim 10
Dependent Claim
212 words
A flat panel display device comprising a generally thin, flat, gas-filled envelope including a base plate and a viewing face plate hermetically sealed together, a plurality of groups of light-generating cathode electrodes spaced apart along said base plate in said envelope, each group of electrodes including a plurality of cathode segments adapted to be energized in different groups to display different characters, an anode electrode in operative relation with each said group of electrodes, a tubulation secured to the bottom surface of said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate whereby gas can be introduced into said envelope, a quantity of mercury globules disposed within said tubulation for introduction of the vapor of a portion thereof into said envelope, some of said mercury globules remaining in said tubulation, and a short small-diameter tube secured to said base plate and having one end open and in communication with said hole therein, said tube extending from said base plate into said tubulation and having its opposite end, within said tubuLation, closed, said tube having a side wall between said open end and said closed end and having a hole in said side wall between said open end and said closed end.
Claim 11
Dependent Claim
212 words
A flat panel display device comprising a generally thin, flat, gas-filled envelope including a base plate and a viewing face plate hermetically sealed together, a plurality of groups of light-generating cathode electrodes spaced apart along said base plate in said envelope, each group of electrodes including a plurality of cathode segments adapted to be energized in different groups to display different characters, an anode electrode in operative relation with each said group of electrodes, a tubulation secured to the bottom surface of said base plate outside said envelope and communicating with the interior of said envelope through a hole in said base plate whereby gas can be introduced into said envelope, a quantity of mercury globules disposed within said tubulation for introduction of the vapor of a portion thereof into said envelope, some of said mercury globules remaining in said tubulation, and a short small-diameter tube secured to said base plate and having one end open and in communication with said hole therein, said tube extending from said base plate into said tubulation and having its opposite end, within said tubuLation, closed, said tube having a side wall between said open end and said closed end and having a hole in said side wall between said open end and said closed end.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |