Patent US3715481A successfully refreshed from Google Patents.
US3715481A
Expired / Lapsed
US
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Magnetic recording and reproduction apparatus for single picture video with audio
Assignee: International Business Machines Corp
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Filing: 1967-08-02
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Granted: 1973-02-06
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Expires: 1987-08-02
Abstract
Abstract An audio and visual recorder wherein the magnetic tape is helically wound about a drum which contains a video and an audio magnetic record and playback head for recording and playing back video and audio information obliquely disposed on tracks of the tape. The head scans a first path of the tape while the tape is being held stationary to provide one frame or two fields of video information. Subsequently the audio head scans the video tape selectively and at a much slower speed. In this way, a single picture can be repetitively obtained on a first track at a first speed by the video head and the audio is recorded at a much slower speed to correspond to the single picture on the video track. After the audio track has been completed to its desired length the recording tape is moved longitudinally to a second position for recording a second video track and a second audio track. The cycle then repeats itself so that a first video track is recorded at a relatively high speed and the audio track at a much slower speed is completed.
Inventors
- 👤 J Harr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:51
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N1/00; H04N1/32; H04N1/32101; H04N1/32106; H04N1/32117; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3261; H04N2201/3264
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
A method of transducing a video signal and an audio signal comprising: moving a video transducer head along a first path, at a first speed, in magnetically coupled relationship with a recording medium, and moving an audio transducer head along a second path, in magnetically coupled relationship with said recording medium, at a second speed substantially slower than said first speed, said video transducer head scanning said first path a plurality of times while said audio transducer scans said second path.
Claim 2
Independent Claim
81 words
A method of transducing a video signal and an audio signal comprising: moving a video transducer head along a first path, at a first speed, in magnetically coupled relationship with a recording medium, and moving an audio transducer head along a second path, in magnetically coupled relationship with said recording medium, at a second speed substantially slower than said first speed, said video transducer head scanning said first path a plurality of times while said audio transducer scans said second path.
Claim 3
Independent Claim
81 words
A method of transducing a video signal and an audio signal comprising: moving a video transducer head along a first path, at a first speed, in magnetically coupled relationship with a recording medium, and moving an audio transducer head along a second path, in magnetically coupled relationship with said recording medium, at a second speed substantially slower than said first speed, said video transducer head scanning said first path a plurality of times while said audio transducer scans said second path.
Claim 4
Independent Claim
81 words
A method of transducing a video signal and an audio signal comprising: moving a video transducer head along a first path, at a first speed, in magnetically coupled relationship with a recording medium, and moving an audio transducer head along a second path, in magnetically coupled relationship with said recording medium, at a second speed substantially slower than said first speed, said video transducer head scanning said first path a plurality of times while said audio transducer scans said second path.
Claim 5
Independent Claim
85 words
A method of transducing a video signal and an audio signal comprising: moving a video transducer head along a first path, at a first speed, in magnetically coupled relationship with a recording medium, and moving an audio transducer head along a second path in magnetically coupled relationship with said recording medium, at a second speed slower than said first speed, said video transducer head being moved along said firSt path a plurality of times while said audio transducer head is moving along said second path.
Claim 6
Independent Claim
85 words
A method of transducing a video signal and an audio signal comprising: moving a video transducer head along a first path, at a first speed, in magnetically coupled relationship with a recording medium, and moving an audio transducer head along a second path in magnetically coupled relationship with said recording medium, at a second speed slower than said first speed, said video transducer head being moved along said firSt path a plurality of times while said audio transducer head is moving along said second path.
Claim 7
Dependent Claim
36 words
A method of transducing a video signal and an audio signal as set forth in claim 1 wherein said first and said second paths are substantially parallel and obliquely disposed with respect to said recording medium.
Claim 8
Dependent Claim
76 words
A method of transducing as set forth in claim 3 comprising recording a video signal on a first track by moving said video transducer head along said first path at said first speed in magnetically coupled relationship with a fixed recording medium and recording an audio track by moving an audio transducer head along said second path in magnetically coupled relationship with said fixed recording medium at a second speed substantially slower than said first speed.
Claim 9
Dependent Claim
89 words
A method as set forth in claim 3 wherein the magnetic recording medium is an elongated magnetic tape and when said audio transducer has finished movement along said second path, said tape is moved longitudinally, again moving the video transducer along said first path at said first speed in magnetically coupled relationship, while said tape is fixed, and moving said audio transducer along said second path in magnetically coupled relationship with said tape, while said recording medium is fixed, at said second substantially slower speed than said first speed.
Claim 10
Dependent Claim
133 words
Apparatus for recording and reproducing a video signal and an audio signal comprising: a video transducer; an audio transducer; a recording medium; first actuating means for moving said video transducer at a first speed, angularly with respect to said recording medium along a first path, in magnetically coupled relationship with said recording medium while said recording medium is in a first fixed position; and second actuating means for moving said audio transducer at a second speed, angularly with respect to said recording medium along a second path, in magnetically coupled relationship with said recording medium while said medium is in said first fixed position; said second speed being substantially slower than said first speed so that the video transducer can repetitively scan said first path while the audio transducer scans said second path.
Claim 11
Dependent Claim
133 words
Apparatus for recording and reproducing a video signal and an audio signal comprising: a video transducer; an audio transducer; a recording medium; first actuating means for moving said video transducer at a first speed, angularly with respect to said recording medium along a first path, in magnetically coupled relationship with said recording medium while said recording medium is in a first fixed position; and second actuating means for moving said audio transducer at a second speed, angularly with respect to said recording medium along a second path, in magnetically coupled relationship with said recording medium while said medium is in said first fixed position; said second speed being substantially slower than said first speed so that the video transducer can repetitively scan said first path while the audio transducer scans said second path.
Claim 12
Dependent Claim
17 words
Apparatus as set forth in claim 6 wherein said first and said second paths are substantially parallel.
Claim 13
Dependent Claim
114 words
Apparatus for recording and reproducing a video and an audio signal as set forth in claim 6 including advancing means for moving said recording mediums to a second fixed position, said first actuating means being operable when said recording medium is in said second fixed position to move said transducer head along said first path at said first speed to transduce a second video track, said second actuating means being operable when said recording medium is in said second fixed position to move said audio transducer along said second path in magnetically coupled relationship with said recording medium to transduce a second audio track at said second speed substantially slower than said first speed.
Claim 14
Dependent Claim
39 words
Apparatus for recording and reproducing a video and an audio signal as set forth in claim 8 including means to selectively actuate said advancing means to longitudinally move said recording medium from said first to said second fixed position.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |