US3662098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary head-type video tape magnetic recording and reproducing system
Assignee: Panasonic Holdings Corp
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Filing: 1970-05-26
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Granted: 1972-05-09
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Expires: 1990-05-26
Abstract
Abstract A rotary head-type video tape magnetic recording and reproducing system in which, at the time of recording, pulse signals are not only recorded on a running magnetic tape but are regenerated and a tape driving system is controlled in such a manner that the regenerated signals maintain a fixed phase relation with a reference signal; and in which, at the time of reproduction, said pulse signals are regenerated and the tape driving system is so controlled that the regenerated signals and a reference signal maintain a fixed relation between each other, thus facilitating the compiling and recording operation of the magnetic tape.
Inventors
- 👤 Osahiko Yano
- 👤 Takahiro Nakamura
- 👤 Masahiro Deguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:56
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/022; G11B27/024; G01; G01P; G01P3/00; G01P3/42; G01P3/50; G01P3/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
296 words
A video tape magnetic recording and reproducing system, comprising: a magnetic recording medium; first and second magnetic head means disposed adjacent said magnetic recording medium in operative engagement therewith, said second magnetic head means being located at a predetermined distance in a running direction of said magnetic recording medium away from said first magnetic head means; means, including an oscilLator connected to said first magnetic head means, for recording a signal on said magnetic record medium through said first magnetic head means; means applying the output signal of said second magnetic head means to said oscillator, wherein the frequency of oscillation of said oscillator, and therefore of the signal recorded on said magnetic recording medium, is controlled by the frequency of said output signal of said second magnetic head means; means, including rotating magnetic head means, for successively recording video image signals on and reproducing them from a continuous recording track oblique to the longitudinal direction of movement of said magnetic recording medium; means, including a first comparator circuit, for comparing the output of said oscillator with a signal having the same frequency as the vertical synchronizing signal component of said video image signal; means, including a phase detector, for detecting the phase of rotation of said rotating magnetic head means; means, including a second comparator circuit, for comparing the output of said phase detector with said signal having the same frequency as said vertical synchronizing signal during the record mode of operation of said system; means, including said second comparator circuit, for comparing the output of said phase detector with said output of said oscillator during the reproduce mode of operation of said system; and means applying the output of said second comparator circuit to said rotating magnetic head means to control the rotation thereof.
Claim 2
Dependent Claim
296 words
A video tape magnetic recording and reproducing system, comprising: a magnetic recording medium; first and second magnetic head means disposed adjacent said magnetic recording medium in operative engagement therewith, said second magnetic head means being located at a predetermined distance in a running direction of said magnetic recording medium away from said first magnetic head means; means, including an oscilLator connected to said first magnetic head means, for recording a signal on said magnetic record medium through said first magnetic head means; means applying the output signal of said second magnetic head means to said oscillator, wherein the frequency of oscillation of said oscillator, and therefore of the signal recorded on said magnetic recording medium, is controlled by the frequency of said output signal of said second magnetic head means; means, including rotating magnetic head means, for successively recording video image signals on and reproducing them from a continuous recording track oblique to the longitudinal direction of movement of said magnetic recording medium; means, including a first comparator circuit, for comparing the output of said oscillator with a signal having the same frequency as the vertical synchronizing signal component of said video image signal; means, including a phase detector, for detecting the phase of rotation of said rotating magnetic head means; means, including a second comparator circuit, for comparing the output of said phase detector with said signal having the same frequency as said vertical synchronizing signal during the record mode of operation of said system; means, including said second comparator circuit, for comparing the output of said phase detector with said output of said oscillator during the reproduce mode of operation of said system; and means applying the output of said second comparator circuit to said rotating magnetic head means to control the rotation thereof.
Claim 3
Dependent Claim
232 words
A video tape magnetic recording and reproducing system, comprising: a magnetic recording medium; first and second magnetic head means disposed adjacent said recording medium in operative engagement therewith, said second magnetic head means being located at a predetermined distance in a running direction of said magnetic recording medium away from said first magnetic head means; means for driving said magnetic recording medium past said first and second magnetic head means; means, including an oscillator having the characteristics of a nonstable multi-vibrator connected to said first magnetic head means, for recording a signal on said magnetic recording medium through said first magnetic head means; means applying the output signal of said second magnetic head means to said oscillator, wherein the frequency of oscillation of said oscillator, and therefore of the signal recorded on said magnetic recording medium through said first magnetic head means, is controlled by the frequency of said output signal of said second magnetic head means; means, including rotating magnetic head means, for successively recording video image signals on and reproducing them from a continuous recording track oblique to the longitudinal direction of movement of said magnetic record medium; means for comparing the output of said second magnetic head means with a signal having the same frequency as the vertical synchronizing signal component of said video image signal; and means applying the output of said comparing means to said driving means.
Claim 4
Dependent Claim
232 words
A video tape magnetic recording and reproducing system, comprising: a magnetic recording medium; first and second magnetic head means disposed adjacent said recording medium in operative engagement therewith, said second magnetic head means being located at a predetermined distance in a running direction of said magnetic recording medium away from said first magnetic head means; means for driving said magnetic recording medium past said first and second magnetic head means; means, including an oscillator having the characteristics of a nonstable multi-vibrator connected to said first magnetic head means, for recording a signal on said magnetic recording medium through said first magnetic head means; means applying the output signal of said second magnetic head means to said oscillator, wherein the frequency of oscillation of said oscillator, and therefore of the signal recorded on said magnetic recording medium through said first magnetic head means, is controlled by the frequency of said output signal of said second magnetic head means; means, including rotating magnetic head means, for successively recording video image signals on and reproducing them from a continuous recording track oblique to the longitudinal direction of movement of said magnetic record medium; means for comparing the output of said second magnetic head means with a signal having the same frequency as the vertical synchronizing signal component of said video image signal; and means applying the output of said comparing means to said driving 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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |