Patent US3301946A successfully refreshed from Google Patents.
US3301946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for magnetic recording device
Assignee: Victor Company of Japan Ltd
•
Filing: 1962-06-05
•
Granted: 1967-01-31
•
Expires: 1982-06-05
Abstract
No abstract record available.
Inventors
- 👤 Takayanagi Kenjiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:42
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A CONTROL SYSTEM COMPRISING A MEANS FOR RECORDING A VIDEO SIGNAL IN PARALLEL OBLIQUE TRACKS ON MAGNETIC MEDIUM BY MEANS OF A MAGNETIC RECORDING HEAD, SIGNAL MEANS FOR PROVIDING TWO PULSES ON THE SAME TRANSVERSE SWEEP OF A RECORDING TRACK, A MEANS FOR PICKING UP IN SEQUENCE TWO PULSES WHICH DIFFER IN TIMING FROM PREDETERMINED TWO POINTS IN A RECORDED TRACK BY REPRODUCING THE RECORDED TRACK WHERE BEING RECORDED THE VIDEO SIGNAL BY MEANS OF A MAGNETIC REPRODUCING HEAD, A ROTARY MEMBER BEING PROVIDED WITH SAID RECORDING HEAD AND REPRODUCING HEAD ON ITS CIRCUMFERENCE, A DRIVING SOURCE FOR DRIVING AND ROTATING SAID ROTARY MEMBER, A MEANS FOR COMPARING A TIME INTERVAL OF THOSE TWO PULSES PICKED UP BY SAID PICKING UP MEANS AND A CONTROL MEANS FOR CONTROLLING A ROTATING SPEED OF SAID ROTARY MEMBER DRIVEN BY SAID DRIVING SOURCE IN ACCORDANCE WITH AN OUTPUT OF SAID COMPARING MEANS.
Claim 2
Dependent Claim
149 words
A CONTROL SYSTEM COMPRISING A MEANS FOR RECORDING A VIDEO SIGNAL IN PARALLEL OBLIQUE TRACKS ON MAGNETIC MEDIUM BY MEANS OF A MAGNETIC RECORDING HEAD, SIGNAL MEANS FOR PROVIDING TWO PULSES ON THE SAME TRANSVERSE SWEEP OF A RECORDING TRACK, A MEANS FOR PICKING UP IN SEQUENCE TWO PULSES WHICH DIFFER IN TIMING FROM PREDETERMINED TWO POINTS IN A RECORDED TRACK BY REPRODUCING THE RECORDED TRACK WHERE BEING RECORDED THE VIDEO SIGNAL BY MEANS OF A MAGNETIC REPRODUCING HEAD, A ROTARY MEMBER BEING PROVIDED WITH SAID RECORDING HEAD AND REPRODUCING HEAD ON ITS CIRCUMFERENCE, A DRIVING SOURCE FOR DRIVING AND ROTATING SAID ROTARY MEMBER, A MEANS FOR COMPARING A TIME INTERVAL OF THOSE TWO PULSES PICKED UP BY SAID PICKING UP MEANS AND A CONTROL MEANS FOR CONTROLLING A ROTATING SPEED OF SAID ROTARY MEMBER DRIVEN BY SAID DRIVING SOURCE IN ACCORDANCE WITH AN OUTPUT OF SAID COMPARING MEANS.
References Cited (Backward Citations)
US3172949A
Cited
GB717726A
Cited
US2783426A
Cited
US3042756A
Cited
US2913652A
Cited
US3012106A
Cited
US3059163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |