US4740846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information signal recording apparatus
Assignee: Canon Inc
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Filing: 1987-02-18
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Granted: 1988-04-26
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Expires: 2007-02-18
Abstract
Abstract An information signal recording apparatus is arranged to selectively supply either a first information signal or a second information signal to recording apparatus for recording the information signal in a track on a record bearing medium; and to control the erasing action of erasing apparatus for erasing the track in association with the selecting operation on the first or second signal.
Inventors
- 👤 Masahiko Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:14
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
An information signal recording apparatus, comprising: (a) head means for tracing on a record bearing medium which has a first area for a first information signal and a second area for a second information signal, said first information signal having a wider bandwidth than said second information signal; (b) moving means for moving said head means relative to said record bearing medium; (c) recording means for selectively supplying either said first information signal or said second information signal to said head means; (d) erasing means for supplying an erasing signal to said head means; (e) discriminating means for discriminating whether a signal is reproduced from the record bearing medium by said head means; and (f) control means for controlling the supply of the erasing signal to said head means by said erasing means, said control means being arranged to permit the supply of the erasing signal to said head means by said erasing means before the recording operation by said head means only when said head means is arranged on said first area and said discriminating means discriminates that the signal has already been recorded on said first area.
Claim 2
Dependent Claim
189 words
An information signal recording apparatus, comprising: (a) head means for tracing on a record bearing medium which has a first area for a first information signal and a second area for a second information signal, said first information signal having a wider bandwidth than said second information signal; (b) moving means for moving said head means relative to said record bearing medium; (c) recording means for selectively supplying either said first information signal or said second information signal to said head means; (d) erasing means for supplying an erasing signal to said head means; (e) discriminating means for discriminating whether a signal is reproduced from the record bearing medium by said head means; and (f) control means for controlling the supply of the erasing signal to said head means by said erasing means, said control means being arranged to permit the supply of the erasing signal to said head means by said erasing means before the recording operation by said head means only when said head means is arranged on said first area and said discriminating means discriminates that the signal has already been recorded on said first area.
Claim 3
Dependent Claim
24 words
An apparatus according to claim 1, wherein said discriminating means includes an envelope detection circuit for detecting the signal reproduced by said head means.
Claim 4
Dependent Claim
38 words
An apparatus according to claim 2, further comprising; tracking control means for controlling a relative position of said record bearing medium with respect to said head means on the basis of output signals of said envelope detection circuit.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 1, wherein said first information signal includes a video signal.
Claim 6
Dependent Claim
50 words
An apparatus according to claim 1, wherein said recording means includes switching means for selectively emitting one of said first information signal and said second information signal, and FM modulation means for FM modulating the signal output from said switching means to supply the modulated signal to said head means.
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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |