Patent US4031428A successfully refreshed from Google Patents.
US4031428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge tube having multiple electrodes arranged in tandem
Assignee: Kimmon Electric Co Ltd
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Filing: 1976-03-15
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Granted: 1977-06-21
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Expires: 1996-03-15
Abstract
Abstract A discharge tube comprises a vessel containing rare gas; a plurality of electrodes (having a cathodic part and anodic part therein) and so arranged tandem in said vessel that a glow discharge is kept in a discharge gap between each said cathodic part and said anodic part of the preceding electrode, and that an optical path is allowed to let through each negative glow part of said glow discharge adjacent to said cathodic part; means to apply a dc voltage across every said discharge gap in series; and means to supply metal vapor to one of said glow discharge at the most low potential end of said means to apply dc voltage, whereby metal ions formed in said one of said glow discharge are carried down throughout said vessel.
Inventors
- 👤 Katsumi Tokudome
- 👤 Shuzo Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:27
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/031; H01S3/038; H01S3/09; H01S3/097
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A discharge tube comprising: a vessel containing rare gas; a plurality of electrodes having a cathodic part and anodic part therein and so arranged tandem in said vessel that a glow discharge is kept in a discharge gap between each said cathodic part and said anodic part of the preceding electrode, and that an optical path is provided to let through each negative glow part of said glow discharge adjacent to said cathodic part; means to apply a dc voltage across every said discharge gap in series; and means to supply metal vapor to one of said glow discharge at the most low potential end of said means to apply dc voltage, whereby metal ions formed in said one of said glow discharge are carried down throughout said vessel.
Claim 2
Dependent Claim
129 words
A discharge tube comprising: a vessel containing rare gas; a plurality of electrodes having a cathodic part and anodic part therein and so arranged tandem in said vessel that a glow discharge is kept in a discharge gap between each said cathodic part and said anodic part of the preceding electrode, and that an optical path is provided to let through each negative glow part of said glow discharge adjacent to said cathodic part; means to apply a dc voltage across every said discharge gap in series; and means to supply metal vapor to one of said glow discharge at the most low potential end of said means to apply dc voltage, whereby metal ions formed in said one of said glow discharge are carried down throughout said vessel.
Claim 3
Dependent Claim
53 words
A discharge tube as claimed in claim 1, wherein said cathodic part of each said electrode comprises a hollow tube coaxial to said optical path and said anodic part comprises a pin having its one end near a hole on a side wall of said hollow tubular anodic part of the preceding electrode.
Claim 4
Dependent Claim
47 words
A discharge tube as claimed in claim 1, wherein said cathodic part of each said electrode comprises a slotted hollow tube coaxial to said optical path and said anodic part comprises a hollow tube placed coaxial to said slotted hollow tubular cathodic part of the preceding electrode.
Claim 5
Dependent Claim
45 words
A discharge tube as claimed in claim 1, wherein said cathodic part of each said electrode comprises a narrow parallel plate placed symmetrical to said optical path and said anodic part comprises a hollow tube surrounding said parallel plate-like cathodic part of the preceding electrode.
Claim 6
Dependent Claim
25 words
A discharge tube as claimed in claim 3, wherein said vessel comprises said hollow tubular anodic part jointed one after another with ceramic insulating tubes.
Claim 7
Dependent Claim
27 words
A discharge tube as claimed in claim 1 which includes means to superpose an ac voltage on said dc voltage to make a non-negative ripple electrode voltage.
Claim 8
Dependent Claim
40 words
A discharge tube as claimed in claim 1, wherein said cathodic part of each electrode comprises a plurality of subdivided electrodes symmetrically arranged around said optical path; and further comprising means to apply ac voltage to each said subdivided 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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |