US3688147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent symbol display tube having plural cathodes and/or vacuum anode insulation
Assignee: Cooper Industries LLC
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Filing: 1970-08-24
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Granted: 1972-08-29
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Expires: 1990-08-24
Abstract
Abstract An evacuated glass envelope contains a plurality of selectively energizable phosphor-coated elements (anodes) for presenting a symbol display. One or more thermionic cathodes are situated between the display elements and the display surface of the envelope to provide a direct electron beam to the phosphor-coated surfaces. The dull red glow of the thermionic cathodes is masked by the symbol display itself and, optionally, by a filter covering the display surface of the envelope. Variations in intensity at the end portions of the display elements are prevented by eliminating insulating members which would accumulate a charge tending to repel the electron beam. Optionally, the end portions of the display elements may be extended and curved to overlap one another and thus provide a symbol display formed by an unbroken luminous field.
Inventors
- 👤 Rein Raago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:20
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/021; H01G7/023; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/15; H01J9/00; H01J9/20; H01J9/22
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
134 words
A display tube comprising: 1. an evacuated transparent envelope having a display surface and a base portion; 2. a plurality of anode display elements each of which is at least partially coated with a phosphor, all disposed within said transparent envelope so as to form any of a desired group of symbols by selectively energizing said anode display elements; 3. at least two cathodes disposed between said display surface and said plurality of anode display elements and positioned in relation to one another so as to cause mutual lateral deflection of the electron streams emanating from said cathodes; and 4. a plurality of means operative to support said anode display elements and said at least two cathodes, and to electrically connect said anode display elements and said at least two cathodes to external circuitry.
Claim 2
Dependent Claim
134 words
A display tube comprising: 1. an evacuated transparent envelope having a display surface and a base portion; 2. a plurality of anode display elements each of which is at least partially coated with a phosphor, all disposed within said transparent envelope so as to form any of a desired group of symbols by selectively energizing said anode display elements; 3. at least two cathodes disposed between said display surface and said plurality of anode display elements and positioned in relation to one another so as to cause mutual lateral deflection of the electron streams emanating from said cathodes; and 4. a plurality of means operative to support said anode display elements and said at least two cathodes, and to electrically connect said anode display elements and said at least two cathodes to external circuitry.
Claim 3
Dependent Claim
26 words
A display tube according to claim 1 wherein said at least two cathodes are substantially vertically disposed with respect to said plurality of anode display elements.
Claim 4
Dependent Claim
41 words
a plurality of anode display elements each of which is at least partially coated with a phosphor, all disposed within said transparent envelope so as to form any of a desired group of symbols by selectively energizing said anode display elements;
Claim 5
Dependent Claim
41 words
a plurality of anode display elements each of which is at least partially coated with a phosphor, all disposed within said transparent envelope so as to form any of a desired group of symbols by selectively energizing said anode display elements;
Claim 6
Dependent Claim
64 words
a plurality of anode display elements each of which is at least partially coated with a phosphor, the adjacent end portions of which are insulated from one another exclusively by the vacuum within said transparent envelope, said anode display elements being disposed within said transparent envelope to form any one of a predetermined group of symbols by selective energization of said anode display elements;
Claim 7
Dependent Claim
64 words
a plurality of anode display elements each of which is at least partially coated with a phosphor, the adjacent end portions of which are insulated from one another exclusively by the vacuum within said transparent envelope, said anode display elements being disposed within said transparent envelope to form any one of a predetermined group of symbols by selective energization of said anode display elements;
Claim 8
Dependent Claim
41 words
a plurality of anode display elements each of which is at least partially coated with a phosphor, all disposed within said transparent envelope so as to form any of a desired group of symbols by selectively energizing said anode display elements;
Claim 9
Dependent Claim
41 words
a plurality of anode display elements each of which is at least partially coated with a phosphor, all disposed within said transparent envelope so as to form any of a desired group of symbols by selectively energizing said anode display elements;
Claim 10
Dependent Claim
39 words
at least two cathodes disposed between said display surface and said plurality of anode display elements and positioned in relation to one another so as to cause mutual lateral deflection of the electron streams emanating from said cathodes; and
Claim 11
Dependent Claim
39 words
at least two cathodes disposed between said display surface and said plurality of anode display elements and positioned in relation to one another so as to cause mutual lateral deflection of the electron streams emanating from said cathodes; and
Claim 12
Dependent Claim
17 words
at least one cathode disposed between said display surface and said plurality of anode display elements; and
Claim 13
Dependent Claim
17 words
at least one cathode disposed between said display surface and said plurality of anode display elements; and
Claim 14
Dependent Claim
39 words
at least two cathodes disposed between said display surface and said plurality of anode display elements and positioned in relation to one another so as to cause mutual lateral deflection of the electron streams emanating from said cathodes; and
Claim 15
Dependent Claim
39 words
at least two cathodes disposed between said display surface and said plurality of anode display elements and positioned in relation to one another so as to cause mutual lateral deflection of the electron streams emanating from said cathodes; and
Claim 16
Dependent Claim
16 words
A display tube according to claim 1 wherein said cathodes are substantially parallel to one another.
Claim 17
Dependent Claim
31 words
A display tube according to claim 1 wherein filter means operative to mask the glow of said at least two cathodes is disposed on said display surface of said transparent envelope.
Claim 18
Dependent Claim
34 words
a plurality of means operative to support said anode display elements and said at least two cathodes, and to electrically connect said anode display elements and said at least two cathodes to external circuitry.
Claim 19
Dependent Claim
34 words
a plurality of means operative to support said anode display elements and said at least two cathodes, and to electrically connect said anode display elements and said at least two cathodes to external circuitry.
Claim 20
Dependent Claim
34 words
a plurality of means operative to support said anode display elements and said at least one cathode, and to electrically connect said anode display elements and said at least one cathode to external circuitry.
Claim 21
Dependent Claim
34 words
a plurality of means operative to support said anode display elements and said at least one cathode, and to electrically connect said anode display elements and said at least one cathode to external circuitry.
Claim 22
Dependent Claim
34 words
a plurality of means operative to support said anode display elements and said at least two cathodes, and to electrically connect said anode display elements and said at least two cathodes to external circuitry.
Claim 23
Dependent Claim
34 words
a plurality of means operative to support said anode display elements and said at least two cathodes, and to electrically connect said anode display elements and said at least two cathodes to external circuitry.
Claim 24
Dependent Claim
39 words
A display tube according to claim 1 wherein said plurality of anode display elements overlap at each junction of two or more of said anode display elements so as to form any dEsired display with a continuous luminous field.
Claim 25
Dependent Claim
39 words
A display tube according to claim 5 wherein, at each junction of two or more of said anode display elements, at least one of said anode display elements has a reflex curvature in the end portion at the junction.
Claim 26
Dependent Claim
4 words
A display tube comprising:
Claim 27
Dependent Claim
4 words
A display tube comprising:
Claim 28
Dependent Claim
39 words
A display tube according to claim 7 wherein said plurality of anode display elements overlap at each junction of two or more of said anode display elements so as to form any desired display with a continuous luminous field.
Claim 29
Dependent Claim
39 words
A display tube according to claim 8 wherein, at each junction of two or more of said anode display elements, at least one of said anode display elements has a reflex curvature in the end portion at the junction.
Claim 30
Dependent Claim
5 words
A gridless display tube comprising:
Claim 31
Dependent Claim
5 words
A gridless display tube comprising:
Claim 32
Dependent Claim
26 words
A display tube according to claim 10 wherein said at least two cathodes are substantially vertically disposed with respect to said plurality of anode display elements.
Claim 33
Dependent Claim
16 words
A display tube according to claim 10 wherein said cathodes are substantially parallel to one another.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |