US3864594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection system for an image tube
Assignee: Westinghouse Electric Corp
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Filing: 1969-12-31
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Granted: 1975-02-04
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Expires: 1989-12-31
Abstract
Abstract A protective system for an image tube to prevent high intensity illumination of the image tube from damaging the high sensitivity electrodes within the image tube. The protection system consists of a magnetic field with associated control circuit responsive to the amplitude of the input radiation to deflect an electron beam generated by said input radiation from the high sensitivity electrode within the image tube during high intensity illumination of the image tube.
Inventors
- 👤 Emil L Svensson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/501; H01J31/502; H01J31/26; H01J31/28; H01J31/34; H01J31/36; H04; H04N; H04N23/00; H04N23/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
An image system comprising an image tube, said image system responsive to input radiations, said image tube comprising means for generating an electron beam and directing it onto a target, deflection means positioned exterior to said image tube for deflecting said electron beam, means responsive to said input radiations greater than a predetermined value to cause energization of said deflection means to deflect said electron beam from the active area of said target.
Claim 2
Dependent Claim
73 words
An image system comprising an image tube, said image system responsive to input radiations, said image tube comprising means for generating an electron beam and directing it onto a target, deflection means positioned exterior to said image tube for deflecting said electron beam, means responsive to said input radiations greater than a predetermined value to cause energization of said deflection means to deflect said electron beam from the active area of said target.
Claim 3
Dependent Claim
23 words
The system in claim 1 in which said target may suffer permanent damage from input radiations above said predetermined value of input radiation.
Claim 4
Dependent Claim
13 words
The system in claim 1 in which said deflection means comprising magnetic means.
Claim 5
Dependent Claim
16 words
The system in claim 1 in which said deflection means comprises a plurality of deflection coils.
Claim 6
Dependent Claim
51 words
The system in claim 1 in which said means responsive to said input radiation comprises a light sensitive device positioned exterior of said envelope to intercept said input radiations and responsive thereto, and switching means responsive to the output of said light sensitive device to apply excitation to said deflection means.
Claim 7
Dependent Claim
29 words
The system in claim 1 in which said means responsive to said input radiations and said deflection means is responsive to deflect said electron beam in about 100 microseconds.
References Cited (Backward Citations)
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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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |