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US3649753A
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Signal address system for apparatus for magnetically recording and reproducing a signal on a rotary member
Assignee: Victor Company of Japan Ltd
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Filing: 1969-11-10
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Granted: 1972-03-14
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Expires: 1989-11-10
Abstract
Abstract A signal address system is adapted for use with apparatus for magnetically recording and reproducing a signal on a rotary member. At least one magnetic head is provided for recording and reproducing a video signal on a rotating magnetic member. The head is moved by drive pulses associated with field signals or frame signals of the video signal. Thus, the number of drive pulses may be used to provide an output signal representing the total number of drive pulses, which is substantially equivalent to an address signal. Thus, an address may be called out without requiring the recording and reproduction of a specific address signal on the magnetic medium.
Inventors
- 👤 Hisao Kinjo
- 👤 Seiichi Takashima
- 👤 Takatoshi Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:01
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/781
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A signal address system for use with apparatus for magnetically recording and reproducing a video signal on a rotating magnetic member, said system comprising at least one magnetic head, means for linearly moving at least one magnetic head over said member for recording and reproducing said video signal on said rotating magnetic member, said moving means including a mechanical structure which takes an incremental movement responsive to each of a succession of drive pulses, means for intermittently driving said magnetic head responsive to each of said drive pulses acting on said structure, whereby head movement corresponds to the number of said drive pulses which are received, means for generating the drive pulses responsive to the field signal or frame signal of said video signal, counter means for counting the number of said drive pulses, and means for effecting an address call-up responsive to an output signal of said counter means.
Claim 2
Dependent Claim
150 words
A signal address system for use with apparatus for magnetically recording and reproducing a video signal on a rotating magnetic member, said system comprising at least one magnetic head, means for linearly moving at least one magnetic head over said member for recording and reproducing said video signal on said rotating magnetic member, said moving means including a mechanical structure which takes an incremental movement responsive to each of a succession of drive pulses, means for intermittently driving said magnetic head responsive to each of said drive pulses acting on said structure, whereby head movement corresponds to the number of said drive pulses which are received, means for generating the drive pulses responsive to the field signal or frame signal of said video signal, counter means for counting the number of said drive pulses, and means for effecting an address call-up responsive to an output signal of said counter means.
Claim 3
Dependent Claim
58 words
A signal address system as defined in claim 1 in which said rotating magnetic member is a disc rotating magnetic medium, and said magnetic head is moved by said structure linearly, intermittently, and radially over said rotating magnetic medium, said movement being in reciprocating motion, for forming tracks in the form of concentric circles on the magnetic medium.
Claim 4
Dependent Claim
92 words
A signal address system as defined in claim 1 further comprising synchronizing signal-separating means for separating synchronizing signals from said video signal, pulse-generating means for producing clock pulses responsive to the synchronizing signals supplied by said separating means, and pulse control means for converting said clock pulses generated by said pulse-generating means into pulses which are spaced apart by a predetermined time interval corresponding to the time interval of fields or frames of the video signal, said intermittent drive means being rendered operative by the output pulses of said pulse control means.
Claim 5
Dependent Claim
64 words
A siGnal address system as defined in claim 1 in which said address call-up means comprises means for giving an indication in accordance with the output signal of said counter means, said indication means indicating the position of a particular signal in a field or frame of said video signal to be recorded and reproduced on said rotating magnetic member by said magnetic head.
Claim 6
Dependent Claim
83 words
A signal address system as defined in claim 1 in which said means for effecting an address call-up comprises a second counter means for counting the number of pulses corresponding to the address position of any predetermined field or frame to be called, and means comprising an AND gate circuit operated responsive to a coincidence of the output of said second counter means and the output of said first counter means, thereby counting a number of drive pulses for providing an address-calling signal.
Claim 7
Dependent Claim
46 words
A signal address system as defined in claim 5 further comprising means responsive to the output signal of said AND gate means to terminate the production of said drive pulses for driving said intermittent drive means so as to render said magnetic head moving means stationary.
Claim 8
Dependent Claim
33 words
A signal address system as defined in claim 5 further comprising second indicator means for indicating the predetermined position to be called when the output of said second counter means is applied thereto.
References Cited (Backward Citations)
US3548095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |