US3778559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary head magnetic recording and reproducing apparatus with pliant record disk for still reproduction of video signals
Assignee: Sony Corp
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Filing: 1972-06-09
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Granted: 1973-12-11
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Expires: 1992-06-09
Abstract
Abstract An apparatus which magnetically records and/or reproduces signals, particularly video signals, by means of a rotary magnetic head which scans skewed record tracks on a magnetic tape as the latter is advanced, for example, about the periphery of a guide drum, in a path that coincides with at least a portion of the circular path of the rotary head, is further provided with a pliant record disk secured at its center to the drive shaft for the rotary head and having a magnetizable surface that confronts a support plate extending perpendicular to the shaft axis and through which a stationary magnetic head extends for recording, in a circular track on the record disk, the signals reproduced from a skewed record track on the magnetic tape, and for repeatedly reproducing the signals recorded in such circular track, as during still reproduction of video signals.
Inventors
- 👤 N Kihara
- 👤 Y Odagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:07
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/781; H04N5/782; H04N5/783
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
A magnetic recording and reproducing apparatus comprising a rotary magnetic head movable in a circular path for recording and reproducing signals in skewed record tracks on a magnetic tape guided in at least a portion of said circular path, a drive shaft connected with said rotary head for effecting movement of the latter in said circular path, a pliant record disk mounted at its center on said drive shaft for rotation with the latter and having a magnetizable surface, a support plate having a surface perpendicular to the axis of said drive shaft and which confronts said magnetizable surface of the record disk, and a stationary magnetic head supported by said support plate and engaging said magnetizable surface of the record disk for recording, in a circular track on said magnetizable surface, a signal reproduced by said rotary head and for repeatedly reproducing the signal recorded in said circular track.
Claim 2
Dependent Claim
150 words
A magnetic recording and reproducing apparatus comprising a rotary magnetic head movable in a circular path for recording and reproducing signals in skewed record tracks on a magnetic tape guided in at least a portion of said circular path, a drive shaft connected with said rotary head for effecting movement of the latter in said circular path, a pliant record disk mounted at its center on said drive shaft for rotation with the latter and having a magnetizable surface, a support plate having a surface perpendicular to the axis of said drive shaft and which confronts said magnetizable surface of the record disk, and a stationary magnetic head supported by said support plate and engaging said magnetizable surface of the record disk for recording, in a circular track on said magnetizable surface, a signal reproduced by said rotary head and for repeatedly reproducing the signal recorded in said circular track.
Claim 3
Dependent Claim
62 words
A magnetic recording and reproducing apparatus according to claim 1, in which said drive shaft extends above said rotary head and has said record disk mounted on the upper end of said drive shaft with said magnetizable surface facing downwardly and said support plate is located below said pliant record disk and has a central opening through which said drive shaft extends.
Claim 4
Dependent Claim
42 words
A magnetic recording and reproducing apparatus according to claim 2, in which said support plate further has an aperture therein spaced radially outward from said shaft, and said stationary magnetic head projects upwardly through said aperture for engagement with said magnetizable surface.
Claim 5
Dependent Claim
72 words
A magnetic recording and reproducing apparatus according to claim 3, further comprising a chassis as to which said drive shaft is fixed in the axial direction of the shaft, adjustable support mounting means extending from said chassis and adjustably positioning said support plate in relation to said pliant record disk, and adjustable head mounting means extending from said support plate and adjustably positioning said stationary magnetic head relative to said support plate.
Claim 6
Dependent Claim
38 words
A magnetic recording and reproducing apparatus according to claim 4, in which said support mounting means includes three legs of individually adjustable height extending between said support plate and said chassis at spaced apart locations about said shaft.
Claim 7
Dependent Claim
80 words
A magnetic recording and reproducing apparatus according to claim 4, in which said adjustable head mounting means includes a head holder disposed below said support plate and carrying said stationary magnetic head, spring means urging said head holder to project said stationary head thereon upwardly through said aperture for engagement with said magnetizable surface, and screw means extending from said support plate to limit the movement of said head holder by said spring means and thereby position said stationary head.
Claim 8
Dependent Claim
52 words
A magnetic recording and reproducing apparatus according to claim 6, in which said screw means includes a first pair of laterally spaced screws defining a fulcrum for tilting of said head holder relative to said support plate, and a third screw acting as a stop for said tilting of the head holder.
Claim 9
Dependent Claim
34 words
A magnetic recording and reproducing apparatus according to claim 1, in which said pliant record disk has a thickness of approximately 0.5 to 1.5 mils and a diameter of approximately 150 to 250 mm.
Claim 10
Dependent Claim
106 words
A magnetic recording and reproducing apparatus according to claim 1, in which said drive shaft extends above said rotary head and has said record disk mounted on the upper end of said drive shaft with said magnetizable surface facing downwardly for being centrifugally urged to a planar configuration in response to rotation of said drive shaft, said support plate is located below said pliant record disk and spaced from said magnetizable surface thereof when said disk is in said planar configuration, and said support plate has a central opening through which said drive shaft extends with a radial clearance therebetween of approximately 15 to 30 mm.
References Cited (Backward Citations)
US3567869A
Cited
US3699247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |