US3634858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous radar recorder and reproducer
Assignee: Individual
•
Filing: 1969-02-14
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Granted: 1972-01-11
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Expires: 1989-02-14
Abstract
Abstract This invention relates to radar apparatus for recording radar information on magnetic tape for subsequent playback into a radar display system. To accurately record this radar information a plurality of signals are recorded simultaneously. These signals include the radar video signal, the beginning of sweep or trigger signal, the reference servo voltage and the stator synchronizing voltage. This invention produces the desirable feature of locking the recorder to the antenna rotation for exact playback.
Inventors
- 👤 John Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:38
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
An apparatus for receiving, recording an playing back a radar video signal, a radar trigger signal, two radar synchrovoltages and a radar reference voltage comprising a magnetic tape recorder, means for recording the radar video and the trigger information in combined form on said tape; means for recording a pair of synchrovoltages and a radar reference voltage on separate tracks of said tape; means for playing back said video and trigger information; means for playback of said pair of synchrovoltages; and means for playing back the radar reference voltage whereby said radar reference voltage locks the playback of the recorder speed to the original antenna rotation.
Claim 2
Independent Claim
106 words
An apparatus for receiving, recording an playing back a radar video signal, a radar trigger signal, two radar synchrovoltages and a radar reference voltage comprising a magnetic tape recorder, means for recording the radar video and the trigger information in combined form on said tape; means for recording a pair of synchrovoltages and a radar reference voltage on separate tracks of said tape; means for playing back said video and trigger information; means for playback of said pair of synchrovoltages; and means for playing back the radar reference voltage whereby said radar reference voltage locks the playback of the recorder speed to the original antenna rotation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |