Patent US3700953A successfully refreshed from Google Patents.
US3700953A
Expired / Lapsed
US
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Image dissector tube
Assignee: Hamamatsu TV Co Ltd
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Filing: 1969-04-28
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Granted: 1972-10-24
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Expires: 1989-04-28
Abstract
Abstract The present disclosure is directed to an image dissector tube having an image forming and scanning section and an electron multiplier section in which a control electrode is provided between said sections so as to apply a blanking voltage synchronously with a retrace period to cut off the beam and thereby present a black background level during the retrace period of the signal produced by the image dissector tube.
Inventors
- 👤 Yoshiji Suzuki
- 👤 Ikuo Hayashi
- 👤 Kazuo Kurasawa
- 👤 Mitsuhiro Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:47
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/021; H01J31/00; H01J31/08; H01J31/26; H01J31/42; H01J31/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
In an image dissector tube comprising an image forming and scanning section terminating in an anode having a scanning aperture disposed therein to pass an electronic current representative of the brightness of an image at a single position through said image forming section into said electron multiplier section for amplifying the current passing through said anode to an output electrode, the improvement for blanking retraces without fluctuating reference levels comprising, an electron current controlling retrace blanking electrode arranged with a current passing aperture in registration with the scanning aperture of said anode located between said image forming and scanning section and said electron multiplier section with said controlling electrode having a characteristic that permits the electronic current passing through said anode to be substantially cut off with a retrace blanking signal.
Claim 2
Dependent Claim
131 words
In an image dissector tube comprising an image forming and scanning section terminating in an anode having a scanning aperture disposed therein to pass an electronic current representative of the brightness of an image at a single position through said image forming section into said electron multiplier section for amplifying the current passing through said anode to an output electrode, the improvement for blanking retraces without fluctuating reference levels comprising, an electron current controlling retrace blanking electrode arranged with a current passing aperture in registration with the scanning aperture of said anode located between said image forming and scanning section and said electron multiplier section with said controlling electrode having a characteristic that permits the electronic current passing through said anode to be substantially cut off with a retrace blanking signal.
References Cited (Backward Citations)
US3041947A
Cited
US3441786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |