US3342949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Editing of tape-recorded video signals
Assignee: US Philips Corp
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Filing: 1963-04-05
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Granted: 1967-09-19
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Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Wessels Johannes Hendrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:16
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; G; G11; G11B; G11B27/00; G11B27/02; G11B27/022; G11B27/029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A MAGNETIC RECORDING AND REPRODUCING DEVICE COMPRISING: A STATIONARY CYLINDRICAL DRUM COMPOSED OF TWO SECTIONS HAVING AN AXIS WITH A GAP BETWEEN THE SECTIONS, A DISC CONCENTRIC WITH SAID DRUM LOCATED IN SAID GAP, MEANS FOR RAPIDLY ROTATING SAID DISC, A MAGNETIC TAPE ADAPTED TO MOVE IN A HELICAL PATH AROUND A PORTION OF THE PERIPHERY OF SAID DRUM, A MAGNETIC RECORDING HEAD LOCATED ON THE CIRCUMFERENCE OF SAID DISC, A MAGNETIC ERASING HEAD ALSO LOCATED ON THE CIRCUMFERENCE OF SAID DISC, SAID HEADS MAGNETICALLY CO-ACTING WITH SAID TAPE, SAID ERASING HEAD LEADING SAID RECORDING HEAD IN THE DIRECTION OF DISC ROTATION, AND A STATIONARY ERASING HEAD LOCATED ADJACENT TO AND MAGNETICALLY CO-ACTING WITH SAID TAPE, THE WIDTH OF THE FRONTAL PORTION OF SAID STATIONARY HEAD BEING SUBSTANTIALLY THE SAME AS THE WIDTH OF SAID TAPE, SAID ERASING HEAD BEING AXIALLY DISPLACED FROM SAID RECORDING HEAD THROUGH A DISTANCE SUCH THAT THE RECORDING AND ERASING HEADS TRAVERSE THE SAME LINES ON THE TAPE.
Claim 2
Dependent Claim
163 words
A MAGNETIC RECORDING AND REPRODUCING DEVICE COMPRISING: A STATIONARY CYLINDRICAL DRUM COMPOSED OF TWO SECTIONS HAVING AN AXIS WITH A GAP BETWEEN THE SECTIONS, A DISC CONCENTRIC WITH SAID DRUM LOCATED IN SAID GAP, MEANS FOR RAPIDLY ROTATING SAID DISC, A MAGNETIC TAPE ADAPTED TO MOVE IN A HELICAL PATH AROUND A PORTION OF THE PERIPHERY OF SAID DRUM, A MAGNETIC RECORDING HEAD LOCATED ON THE CIRCUMFERENCE OF SAID DISC, A MAGNETIC ERASING HEAD ALSO LOCATED ON THE CIRCUMFERENCE OF SAID DISC, SAID HEADS MAGNETICALLY CO-ACTING WITH SAID TAPE, SAID ERASING HEAD LEADING SAID RECORDING HEAD IN THE DIRECTION OF DISC ROTATION, AND A STATIONARY ERASING HEAD LOCATED ADJACENT TO AND MAGNETICALLY CO-ACTING WITH SAID TAPE, THE WIDTH OF THE FRONTAL PORTION OF SAID STATIONARY HEAD BEING SUBSTANTIALLY THE SAME AS THE WIDTH OF SAID TAPE, SAID ERASING HEAD BEING AXIALLY DISPLACED FROM SAID RECORDING HEAD THROUGH A DISTANCE SUCH THAT THE RECORDING AND ERASING HEADS TRAVERSE THE SAME LINES ON THE TAPE.
References Cited (Backward Citations)
US2924668A
Cited
US3042756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |