US3867671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark gap protective device for cathode ray tubes
Assignee: TE Connectivity Corp
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Filing: 1973-11-19
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Granted: 1975-02-18
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Expires: 1993-11-19
Abstract
Abstract A device is disclosed for providing spark gap protection between the several pins of a cathode ray tube and solid state circuitry associated therewith. The device includes an insulated substrate having resilient arms disposed about a central opening in the substrate for centering the device on the tube base and a metallic layer fixed to the substrate and to a mounting strap. The device is mounted on the base of a cathode ray tube with projections of the metallic layer extending to within a predetermined distance from the tube pins to provide a spark gap therebetween.
Inventors
- 👤 Tore Rudolf Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:00
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A multiple spark gap protective device for protecting solid state circuitry associated with cathode ray tubes from high voltage discharges from such tubes comprising: an insulating substrate having a keyed central aperture and a plurality of resilient centering means disposed about the periphery of said aperture, said resilient centering means including a plurality of arcuate cantilevered arms integral with said substrate and disposed about the periphery of said aperture; a metallic plate secured to said insulating substrate including a central aperture having a plurality of radially inwardly directed projections extending over the central aperture of said substrate in cantilever fashion whereby a plurality of spark gaps are formed between said projections and pins of a cathode ray tube when said device is mounted on the base of said tube; and common ground means secured to said plate.
Claim 2
Dependent Claim
137 words
A multiple spark gap protective device for protecting solid state circuitry associated with cathode ray tubes from high voltage discharges from such tubes comprising: an insulating substrate having a keyed central aperture and a plurality of resilient centering means disposed about the periphery of said aperture, said resilient centering means including a plurality of arcuate cantilevered arms integral with said substrate and disposed about the periphery of said aperture; a metallic plate secured to said insulating substrate including a central aperture having a plurality of radially inwardly directed projections extending over the central aperture of said substrate in cantilever fashion whereby a plurality of spark gaps are formed between said projections and pins of a cathode ray tube when said device is mounted on the base of said tube; and common ground means secured to said plate.
References Cited (Backward Citations)
US2476671A
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US3227910A
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US3281620A
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US3278886A
Cited
US3502933A
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US3683228A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |