US3719852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial electric arc discharge devices
Assignee: General Electric Co
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Filing: 1970-11-23
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Granted: 1973-03-06
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Expires: 1990-11-23
Abstract
Abstract Triggerable electric arc discharge device includes coaxial cathode and anode electrodes defining therebetween a hollow cylindrical primary arcing gap. A trigger assembly having an elongated longitudinal configuration is inserted into a longitudinal bore formed in and adjacent to the surface of the cathode electrode so as to be partially exposed into the interelectrode gap. Trigger assembly includes a ceramic hollow cylinder surrounding a metallic trigger electrode. Trigger gap is defined by extension of the trigger electrode past the inboard end of the trigger ceramic insulator and a trigger gap exists between the extended portion of the trigger electrode over the inboard end of the ceramic insulator and to the body of the cathode electrode. A voltage is connected between anode and cathode electrodes and a relatively low voltage pulse is supplied to the trigger electrode, causing breakdown of the trigger gap. Trigger arc formed thereby causes propulsion of ionized specie into the main gap and breakdown thereof.
Inventors
- 👤 C Goody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
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: 11
Claim 1
Independent Claim
198 words
A triggerable electric arc discharge device comprising: a first electrode having an exterior surface and a bore therein extending adjacent said exterior surface and intersecting said exterior surface to define an opening in said exterior surface communicating with said bore; a trigger assembly including a trigger electrode with a portion thereof protruding from a ceramic body surrounding said trigger electrode, said assembly partially filling said bore so that there remains an unfilled portion of said bore and an unclosed portion of said opening communicating with said unfilled portion, said unfilled portion defining a trigger gap between the protruding trigger electrode portion surrounded by the ceramic body and the first electrode; a second electrode surrounding said exterior surface and spaced therefrom to define an arc gap which communicates with said trigger gap through said unclosed portion of said opening; means for supplying an arcing voltage between said first and second electrodes; means for supplying a pulsed trigger voltage to said trigger electrode; and, means hermetically enveloping at least portions of said first, second and trigger electrodes together with said arc and trigger gaps as well as the unclosed portion of said opening communicating said gaps, said means being evacuated.
Claim 2
Dependent Claim
198 words
A triggerable electric arc discharge device comprising: a first electrode having an exterior surface and a bore therein extending adjacent said exterior surface and intersecting said exterior surface to define an opening in said exterior surface communicating with said bore; a trigger assembly including a trigger electrode with a portion thereof protruding from a ceramic body surrounding said trigger electrode, said assembly partially filling said bore so that there remains an unfilled portion of said bore and an unclosed portion of said opening communicating with said unfilled portion, said unfilled portion defining a trigger gap between the protruding trigger electrode portion surrounded by the ceramic body and the first electrode; a second electrode surrounding said exterior surface and spaced therefrom to define an arc gap which communicates with said trigger gap through said unclosed portion of said opening; means for supplying an arcing voltage between said first and second electrodes; means for supplying a pulsed trigger voltage to said trigger electrode; and, means hermetically enveloping at least portions of said first, second and trigger electrodes together with said arc and trigger gaps as well as the unclosed portion of said opening communicating said gaps, said means being evacuated.
Claim 3
Dependent Claim
198 words
A triggerable electric arc discharge device comprising: a first electrode having an exterior surface and a bore therein extending adjacent said exterior surface and intersecting said exterior surface to define an opening in said exterior surface communicating with said bore; a trigger assembly including a trigger electrode with a portion thereof protruding from a ceramic body surrounding said trigger electrode, said assembly partially filling said bore so that there remains an unfilled portion of said bore and an unclosed portion of said opening communicating with said unfilled portion, said unfilled portion defining a trigger gap between the protruding trigger electrode portion surrounded by the ceramic body and the first electrode; a second electrode surrounding said exterior surface and spaced therefrom to define an arc gap which communicates with said trigger gap through said unclosed portion of said opening; means for supplying an arcing voltage between said first and second electrodes; means for supplying a pulsed trigger voltage to said trigger electrode; and, means hermetically enveloping at least portions of said first, second and trigger electrodes together with said arc and trigger gaps as well as the unclosed portion of said opening communicating said gaps, said means being evacuated.
Claim 4
Dependent Claim
198 words
A triggerable electric arc discharge device comprising: a first electrode having an exterior surface and a bore therein extending adjacent said exterior surface and intersecting said exterior surface to define an opening in said exterior surface communicating with said bore; a trigger assembly including a trigger electrode with a portion thereof protruding from a ceramic body surrounding said trigger electrode, said assembly partially filling said bore so that there remains an unfilled portion of said bore and an unclosed portion of said opening communicating with said unfilled portion, said unfilled portion defining a trigger gap between the protruding trigger electrode portion surrounded by the ceramic body and the first electrode; a second electrode surrounding said exterior surface and spaced therefrom to define an arc gap which communicates with said trigger gap through said unclosed portion of said opening; means for supplying an arcing voltage between said first and second electrodes; means for supplying a pulsed trigger voltage to said trigger electrode; and, means hermetically enveloping at least portions of said first, second and trigger electrodes together with said arc and trigger gaps as well as the unclosed portion of said opening communicating said gaps, said means being evacuated.
Claim 5
Dependent Claim
39 words
The device according to claim 1 wherein said first and second electrodes are cylindrical and wherein said trigger electrode extends within said bore in said first electrode for a distance of approximately half the length of said first electrode.
Claim 6
Dependent Claim
31 words
The device according to claim 1 wherein said first and second electrodes are fabricated from high-purity gas-free metallic materials having a vapor pressure at least as high as that of copper.
Claim 7
Dependent Claim
26 words
The device according to claim 1 wherein said second electrode is a permeable structure adapted to pass particles and vapors ejected from the first electrode therethrough.
Claim 8
Dependent Claim
28 words
The device according to claim 4 wherein saId first electrode is fabricated from an active gas gettering material and said device functions as a getter type vacuum pump.
Claim 9
Dependent Claim
30 words
The device according to claim 5 wherein said first electrode is fabricated from a material selected from the group consisting of zirconium, titanium, beryllium, cerium, hafnium, aluminum, magnesium and tantalum.
Claim 10
Dependent Claim
14 words
The device according to claim 4 wherein said second electrode is a helical member.
Claim 11
Dependent Claim
21 words
The device according to claim 7 wherein said second electrode is hollow and adapted to sustain a flow of fluid coolant.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |