US4147951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge lamp having a double electrode arrangement
Assignee: Schott AG
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Filing: 1978-01-16
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Granted: 1979-04-03
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Expires: 1998-01-16
Abstract
Abstract A gas discharge lamp is disclosed having a double electrode arrangement in a discharge space. The discharge space is defined by a glass tube sealed in gas-tight fashion and which is subdivided approximately along a longitudinal center-line by a separation plate. One end of the tube is open and receives an insulating disc through which lead wires for the electrodes pass. The insulating disc is connected in gas-tight fashion to the tube. The separation plate extends from the insulating disc towards the opposite end of the tube and terminates at a point spaced from the end of the tube. Accordingly, gas-tight discharge half spaces are formed at both sides of the separation plate with a connecting discharge space at the end of the tube which is not subdivided by the separation plate.
Inventors
- 👤 Gerd Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
A gas discharge lamp, comprising: first and second electrodes; an elongated glass tube having a closed end and an open end opposite the closed end; a separate electrically insulating substantially planar disc mounted in gas-tight sealed fashion in the tube open end; electrical lead-in wires positioned through the insulating disc connecting and supporting said electrodes; a separation plate having one end connected in gas-tight fashion to the insulating disc between the electrodes, entire side edges of the separation plate connecting in gas-tight fashion to sides of the glass tube except for a portion of at least one of the side edges adjacent the insulating disc at which is provided a gas-permeable discharge-tight aperture means for cataphoresis suppression, and the separation plate extending from the insulating disc along a length of the tube and terminating at a point spaced from the closed end so as to form first and second discharge tight half spaces and a connecting discharge space communicating between the first and second half spaces.
Claim 2
Dependent Claim
166 words
A gas discharge lamp, comprising: first and second electrodes; an elongated glass tube having a closed end and an open end opposite the closed end; a separate electrically insulating substantially planar disc mounted in gas-tight sealed fashion in the tube open end; electrical lead-in wires positioned through the insulating disc connecting and supporting said electrodes; a separation plate having one end connected in gas-tight fashion to the insulating disc between the electrodes, entire side edges of the separation plate connecting in gas-tight fashion to sides of the glass tube except for a portion of at least one of the side edges adjacent the insulating disc at which is provided a gas-permeable discharge-tight aperture means for cataphoresis suppression, and the separation plate extending from the insulating disc along a length of the tube and terminating at a point spaced from the closed end so as to form first and second discharge tight half spaces and a connecting discharge space communicating between the first and second half spaces.
Claim 3
Dependent Claim
26 words
The lamp of claim 1 wherein the glass tube open end is circular and of the same diameter as the tube, and the disc is circular.
Claim 4
Dependent Claim
12 words
The lamp of claim 2 wherein the gas-tight connections are solder glass.
Claim 5
Dependent Claim
11 words
The lamp of claim 3 wherein the disc comprises solder glass.
Claim 6
Dependent Claim
15 words
The lamp of claim 2 wherein the closed end comprises a pinched off pumping shaft.
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) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |