Patent US3612937A successfully refreshed from Google Patents.
US3612937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-pressure controlled discharge device with trigger electrode within hollow cathode
Assignee: Individual
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Filing: 1969-10-08
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Granted: 1971-10-12
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Expires: 1989-10-08
Abstract
Abstract A discharge device comprises an anode, a hollow cathode with apertures on a side facing the anode and a trigger electrode disposed within the hollow cathode. The trigger electrode is constituted as two plates with interconnecting conductive posts one of the plates being disposed at the side of the cathode with the apertures, the other plate being disposed at the opposite side of the cathode. The hollow cathode has a linear dimension between sidewalls at least several times greater than the size of the main discharge gap between the anode and the cathode. The plate of the trigger electrode which is disposed at the side of the cathode with the apertures may be placed in one of such apertures so as to lie in a common plane with the side of the cathode.
Inventors
- 👤 Sergei Alexandrovich Smirnov
- 👤 Ivan Ivanovich Aksenov
- 👤 Vladimir Konstantinov Bocharov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:40
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/40; H01J17/44; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0068
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A low-pressure controlled discharge device comprising an anode, a hollow cathode adjacent said anode and including a sidewall facing said anode and defining a main discharge gap therebetween, said cathode including an opposite sidewall remote from said anode, said sidewall of the cathode facing the anode being provided with apertures, and a trigger electrode disposed inside said hollow cathode and constituted as two plates with interconnecting conductive posts, one of said plates being disposed at said sidewall of the cathode with the apertures, the other plate being disposed at said opposite sidewall of said cathode, said hollow cathode having a linear dimension between said sidewalls at least several times greater than the size of said main discharge gap between the anode and cathode.
Claim 2
Dependent Claim
123 words
A low-pressure controlled discharge device comprising an anode, a hollow cathode adjacent said anode and including a sidewall facing said anode and defining a main discharge gap therebetween, said cathode including an opposite sidewall remote from said anode, said sidewall of the cathode facing the anode being provided with apertures, and a trigger electrode disposed inside said hollow cathode and constituted as two plates with interconnecting conductive posts, one of said plates being disposed at said sidewall of the cathode with the apertures, the other plate being disposed at said opposite sidewall of said cathode, said hollow cathode having a linear dimension between said sidewalls at least several times greater than the size of said main discharge gap between the anode and cathode.
Claim 3
Dependent Claim
76 words
A low-pressure controlled discharge device as claimed in claim 1, wherein said plate of the trigger electrode at said wall of the cathode facing the anode is arranged in one of said apertures in the latter sidewall of the cathode, the size and shape of said one aperture being such that a uniform gap is formed between the edges of said plate and said one aperture, the latter gap being smaller than the main discharge gap.
Claim 4
Dependent Claim
25 words
A low-pressure controlled discharge device as claimed in claim 1, wherein said apertures have a diameter smaller than the size of said main discharge gap.
References Cited (Backward Citations)
US3328632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |