US4229770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recording on a magnetic tape which is attached to a card
Assignee: Sony Corp
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Filing: 1979-02-02
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Granted: 1980-10-21
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Expires: 1999-02-02
Abstract
Abstract A recording method for a magnetic tape attached to a card is provided in which an audio signal from a master recorder is pulse coded by a PCM conversion circuit and stored in a solid memory of a predetermined capacity, and the stored signal is read repetitively by a control signal, then converted into an analog audio signal and recorded on one of the channel tracks of the magnetic tape in the slave side recorder while a cue signal formed at a predetermined timing in correspondence to the audio signal is recorded repetitively on the other channel track of the magnetic tape.
Inventors
- 👤 Takamasa Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:54
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/86
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A recording method for a magnetic tape attached to a card, in which an audio signal from a master recorder is pulse coded by a PCM converting circuit and stored in a solid memory of a predetermined capacity, and this stored signal is read out repeatedly by a control signal, again converted into an analog audio signal and recorded on one of the channel tracks of the magnetic tape in each slave side recorder while the cue signal formed at a predetermined timing relative to said audio signal is recorded repeatedly on the other channel track of said magnetic tape.
Claim 2
Dependent Claim
100 words
A recording method for a magnetic tape attached to a card, in which an audio signal from a master recorder is pulse coded by a PCM converting circuit and stored in a solid memory of a predetermined capacity, and this stored signal is read out repeatedly by a control signal, again converted into an analog audio signal and recorded on one of the channel tracks of the magnetic tape in each slave side recorder while the cue signal formed at a predetermined timing relative to said audio signal is recorded repeatedly on the other channel track of said magnetic tape.
Claim 3
Dependent Claim
51 words
A recording method for a magnetic tape attached to a card as claimed in claim 1, wherein the pulse coded version of the audio signal from the master tape is stored in said solid memory by a control signal obtained from said master tape or by an externally produced control signal.
Claim 4
Dependent Claim
39 words
A recording method for a magnetic tape attached to a card as claimed in claim 2, wherein said storing operation is performed with a given time lag by a timer operation of the controller operated by said control signal.
Claim 5
Dependent Claim
45 words
A recording method for a magnetic tape attached to a card as claimed in claim 1, wherein reading of the solid memory by said control signal is performed after the operation of the cue signal generating means by a read instruction to said solid memory.
Claim 6
Dependent Claim
42 words
A recording method for a magnetic tape attached to a card as claimed in claim 1, wherein the output time of the cue signal given from the cue signal generating means can be adjusted as desired by a time constant compensating circuit.
References Cited (Backward Citations)
US3889292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |