Patent US4396084A successfully refreshed from Google Patents.
Patent US3258643A successfully refreshed from Google Patents.
US3258643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam convergence apparatus
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:49
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A TELEVISION COLOR IMAGE DISPLAY SYSTEM INCLUDING A MULTIPLE BEAM COLOR IMAGE REPRODUCING DEVICE AND DEFLECTION MEANS FOR DEFLECTING SAID BEAMS IN A SERIES OF VERTICALLY SPACED HORIZONTAL LINES DURING SUCCESSIVE BEAM TRACE PERIODS TO FORM A RASTER, THE COMBINATION FOR CONVERGING SAID BEAMS AT ALL POINTS OF SAID RASTER COMPRISING; A DYNAMIC CONVERGENCE ELECTROMAGNET HAVING AN ENERGIZING WINDING; A SOURCE OF A SAWTOOTH WAVE; MEANS COUPLING SAID SOURCE TO SAID WINDING; AND WAVE-SHAPING MEANS INCLUDING A PARALLEL ARRANGEMENT OF A DIODE AND A RESISTOR AND COMPRISING AT LEAST PART OF SAID COUPLING MEANS, SAID WAVE-SHAPING MEANS FUNCTIONING TO SO MODIFY SAID SAWTOOTH WAVE THAT ITS IMPRESSION UPON SAID WINDING CAUSES TO FLOW THROUGH SAID WINDING A CURRENT WAVE HAVING A SUBSTANTIALLY SYMMETRICAL PARABOLIC FORM WITH RELATIVELY STEEP SIDE PORTIONS OCCURRING RESPECTIVELY AT THE START AND FINISH OF EACH OF SAID TRACE PERIODS.
Claim 2
Dependent Claim
144 words
IN A TELEVISION COLOR IMAGE DISPLAY SYSTEM INCLUDING A MULTIPLE BEAM COLOR IMAGE REPRODUCING DEVICE AND DEFLECTION MEANS FOR DEFLECTING SAID BEAMS IN A SERIES OF VERTICALLY SPACED HORIZONTAL LINES DURING SUCCESSIVE BEAM TRACE PERIODS TO FORM A RASTER, THE COMBINATION FOR CONVERGING SAID BEAMS AT ALL POINTS OF SAID RASTER COMPRISING; A DYNAMIC CONVERGENCE ELECTROMAGNET HAVING AN ENERGIZING WINDING; A SOURCE OF A SAWTOOTH WAVE; MEANS COUPLING SAID SOURCE TO SAID WINDING; AND WAVE-SHAPING MEANS INCLUDING A PARALLEL ARRANGEMENT OF A DIODE AND A RESISTOR AND COMPRISING AT LEAST PART OF SAID COUPLING MEANS, SAID WAVE-SHAPING MEANS FUNCTIONING TO SO MODIFY SAID SAWTOOTH WAVE THAT ITS IMPRESSION UPON SAID WINDING CAUSES TO FLOW THROUGH SAID WINDING A CURRENT WAVE HAVING A SUBSTANTIALLY SYMMETRICAL PARABOLIC FORM WITH RELATIVELY STEEP SIDE PORTIONS OCCURRING RESPECTIVELY AT THE START AND FINISH OF EACH OF SAID TRACE PERIODS.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |