US3349271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for preventing eddy current distortion of the magnetically deflected scanned pattern in cathode ray tubes
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1965-02-17
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Granted: 1967-10-24
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Expires: 1985-02-17
Abstract
No abstract record available.
Inventors
- 👤 Harkensee George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:36
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/76; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/34; H01J31/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A CATHODE RAY TUBE COMPRISING, IN COMBINATION, AN EVACUATED ENVELOPE HOUSING; AN ELECTRON BEAM SOURCE WITHIN SAID HOUSING FOR DIRECTING AN ELECTRON BEAM SUBSTANTIALLY ALONG THE LONGITUDINAL AXIS OF SAID HOUSING; A TARGET ELECTRODE WITHIN SAID HOUSING IN THE PATH OF THE ELECTRODE BEAM TO BE SCANNED BY SAID ELECTRON BEAM MAGNETIC DEFLECTING MEANS ACTING ON SAID ELECTRON BEAM FOR DEFLECTING THE SAME ALONG ORTHOGONAL COORDINATE AXES AT SAID TARGET ELECTRODE SO AS TO SCAN SAID TARGET ELECTRODE; A FIRST ELECTRODE WITHIN SAID HOUSING AND SURROUNDING SAID ELECTRON BEAM; SECOND ELECTRODE WITHIN SAID HOUSING AND SURROUNDING SAID ELECTRON BEAM; AND A PLURALITY OF CONTACT MEMBERS CONNECTING SAID FIRST AND SECOND ELECTRODES AND EQUALLY SPACED ABOUT SAID LONGITUDINAL AXIS SO THAT EACH CONTACT MEMBER FORMS AN ANGLE OF SUBSTANTIALLY 45 DEGREES WITH SAID COORDINATE AXES, WHEREBY GEOMETRICAL DISTORTION OF THE SCANNING PATTERN IS MINIMIZED.
Claim 2
Dependent Claim
143 words
A CATHODE RAY TUBE COMPRISING, IN COMBINATION, AN EVACUATED ENVELOPE HOUSING; AN ELECTRON BEAM SOURCE WITHIN SAID HOUSING FOR DIRECTING AN ELECTRON BEAM SUBSTANTIALLY ALONG THE LONGITUDINAL AXIS OF SAID HOUSING; A TARGET ELECTRODE WITHIN SAID HOUSING IN THE PATH OF THE ELECTRODE BEAM TO BE SCANNED BY SAID ELECTRON BEAM MAGNETIC DEFLECTING MEANS ACTING ON SAID ELECTRON BEAM FOR DEFLECTING THE SAME ALONG ORTHOGONAL COORDINATE AXES AT SAID TARGET ELECTRODE SO AS TO SCAN SAID TARGET ELECTRODE; A FIRST ELECTRODE WITHIN SAID HOUSING AND SURROUNDING SAID ELECTRON BEAM; SECOND ELECTRODE WITHIN SAID HOUSING AND SURROUNDING SAID ELECTRON BEAM; AND A PLURALITY OF CONTACT MEMBERS CONNECTING SAID FIRST AND SECOND ELECTRODES AND EQUALLY SPACED ABOUT SAID LONGITUDINAL AXIS SO THAT EACH CONTACT MEMBER FORMS AN ANGLE OF SUBSTANTIALLY 45 DEGREES WITH SAID COORDINATE AXES, WHEREBY GEOMETRICAL DISTORTION OF THE SCANNING PATTERN IS MINIMIZED.
References Cited (Backward Citations)
US2264624A
Cited
US3188506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |