US3696264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically modulated vacuum arc diode
Assignee: Calspan Corp
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Filing: 1970-06-24
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Granted: 1972-10-03
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Expires: 1990-06-24
Abstract
Abstract A vacuum arc switching device having a stationary cathode, a stationary spaced concentric anode, an ignitor electrode spaced from the cathode and an annular magnetic field coil concentric with and spaced from the anode.
Inventors
- 👤 Richard J Clark Jr
- 👤 Harry Veron
- 👤 Alexander S Gilmour Jr
- 👤 David L Lockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:41
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/14; H03; H03K; H03K17/00; H03K17/51; H03K17/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A vacuum arc switching device, comprising; a. a stationary cathode, b. a concentric stationary anode, c. said cathode and anode being located in a vacuum environment, d. means for generating a vacuum arc on said cathode creating a conducting path between said anode and cathode, and e. means concentric to said anode for developing a magnetic field for increasing the impedance across said anode and cathode to thereby extinguish said arc.
Claim 2
Dependent Claim
71 words
A vacuum arc switching device, comprising; a. a stationary cathode, b. a concentric stationary anode, c. said cathode and anode being located in a vacuum environment, d. means for generating a vacuum arc on said cathode creating a conducting path between said anode and cathode, and e. means concentric to said anode for developing a magnetic field for increasing the impedance across said anode and cathode to thereby extinguish said arc.
Claim 3
Dependent Claim
35 words
The switching device according to claim 1, wherein; f. said means for generating said vacuum arc comprises an ignitor electrode spaced from said cathode, and g. an insulator between said ignitor electrode and said cathode.
Claim 4
Dependent Claim
21 words
The switching device according to claim 2, wherein; h. said means concentric to said anode comprises an annular magnetic field coil.
Claim 5
Dependent Claim
35 words
The switching device according to claim 3, wherein; i. said cathode comprise a cylindrical metallic rod, and j. said anode comprises a substantially frusto-conical annular shell spaced from and in surrounding relation with said cathode.
Claim 6
Dependent Claim
21 words
The switching device according to claim 1, wherein; f. said means concentric to said anode comprises an annular magnetic field coil.
Claim 7
Dependent Claim
35 words
The switching device according to claim 5, wherein; g. said cathode comprise a cylindrical metallic rod, and h. said anode comprises a substantially frusto-conical annular shell spaced from and in surrounding relation with said cathode.
References Cited (Backward Citations)
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Cited
US2892145A
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US2953714A
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US3014109A
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US3202852A
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US3248603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |