Patent US2166017A successfully refreshed from Google Patents.
US3714501A
Expired / Lapsed
US
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Linearity correction for magnetically deflectable cathode ray tubes
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1971-11-26
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Granted: 1973-01-30
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Expires: 1991-11-26
Abstract
Abstract APPARATUS IS PROVIDED FOR CORRECTING OUTPUT SIGNALS TO THE YOKE OF A CRT. THE OUTPUT SIGNALS ARE CORRECTED IN A FEEDBACK LOOP AND RECOMBINED WITH THE INPUT SIGNALS IN ACCORDANCE WITH THE ALGORITHMS XO G (XIN-CXO(XO2+YO2)) AND YO G (YIN-CYO(XO2+YO2)) WHERE XO AND YO ARE THE OUTPUT SIGNALS FOR THE X AND Y YOKES OF THE CRT, XIN AND YIN ARE THE UNCORRECTED INPUT DEFLECTION SIGNALS , AND G AND C ARE GAIN CONSTANTS ASSOCIATED WITH THE APPARATUS.
Inventors
- 👤 F Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:33
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/233; H04N3/2335
Claims Analysis
Total Claims: 0
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |