US3157739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal recording and reproducing system
Assignee: Individual
•
Filing: 1962-11-27
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Granted: 1964-11-17
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Expires: 1982-11-27
Abstract
No abstract record available.
Inventors
- 👤 Okamura Shiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/783; G; G11; G11B; G11B15/00; G11B15/02; G11B15/12; G11B15/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
AN ARRANGEMENT FOR RECORDING AND REPRODUCING PERIODIC SIGNALS COMPRISING MOVABLE SIGNAL RECORDING MEANS FOR RECEIVING SAID SIGNALS TO DEVELOP A MAGNETIC FIELD IN RESPONSE THERETO, A MOVABLE RECORDING MEDIUM FOR RECEIVING MAGNETIC IMPRESSIONS OF SAID SIGNALS WHEN SAID MEDIUM IS SCANNED BY SAID MEANS, SAID MAGNETIC IMPRESSIONS BEING IN THE FORM OF A PLURALITY OF TRACKS OF IDENTICAL SHAPE AND SPACED EQUIDISTANTLY FROM ONE ANOTHER, AND A PAIR OF REPRODUCING HEADS ADAPTED TO SIMULTANEOUSLY SCAN SAID IMPRESSIONS TO THEREBY DEVELOP OUTPUT SIGNALS, SAID HEADS EACH HAVING AN EFFECTIVE WIDTH SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID TRACKS AND BEING POSITIONED INCOMPLEMENTARY RELATIONSHIP SO THAT WHEN ONE OF SAID HEADS SCANS ONE OF SAID TRACKS IN A POSITION OF SUBSTANTIALLY PERFECT ALIGNMENT THEREWITH THE OTHER OF SAID HEADS SCANS THE SPACING BETWEEN SAID TRACKS, AND SWITCHING MEANS FOR ALTERNATELY SELECTING THE OUTPUT SIGNALS FROM SAID HEADS WHEN THE RATE AT WHICH SAID REPRODUCED SIGNALS ARE DEVELOPED IS DIFFERENT FROM THE RATE AT WHICH SAID PERIODIC SIGNALS ARE RECORDED.
Claim 2
Dependent Claim
167 words
AN ARRANGEMENT FOR RECORDING AND REPRODUCING PERIODIC SIGNALS COMPRISING MOVABLE SIGNAL RECORDING MEANS FOR RECEIVING SAID SIGNALS TO DEVELOP A MAGNETIC FIELD IN RESPONSE THERETO, A MOVABLE RECORDING MEDIUM FOR RECEIVING MAGNETIC IMPRESSIONS OF SAID SIGNALS WHEN SAID MEDIUM IS SCANNED BY SAID MEANS, SAID MAGNETIC IMPRESSIONS BEING IN THE FORM OF A PLURALITY OF TRACKS OF IDENTICAL SHAPE AND SPACED EQUIDISTANTLY FROM ONE ANOTHER, AND A PAIR OF REPRODUCING HEADS ADAPTED TO SIMULTANEOUSLY SCAN SAID IMPRESSIONS TO THEREBY DEVELOP OUTPUT SIGNALS, SAID HEADS EACH HAVING AN EFFECTIVE WIDTH SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID TRACKS AND BEING POSITIONED INCOMPLEMENTARY RELATIONSHIP SO THAT WHEN ONE OF SAID HEADS SCANS ONE OF SAID TRACKS IN A POSITION OF SUBSTANTIALLY PERFECT ALIGNMENT THEREWITH THE OTHER OF SAID HEADS SCANS THE SPACING BETWEEN SAID TRACKS, AND SWITCHING MEANS FOR ALTERNATELY SELECTING THE OUTPUT SIGNALS FROM SAID HEADS WHEN THE RATE AT WHICH SAID REPRODUCED SIGNALS ARE DEVELOPED IS DIFFERENT FROM THE RATE AT WHICH SAID PERIODIC SIGNALS ARE RECORDED.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |