US4376293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic disk recording and/or reproducing device
Assignee: Panasonic Holdings Corp
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Filing: 1980-12-16
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Granted: 1983-03-08
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Expires: 2000-12-16
Abstract
Abstract A magnetic disk recording and/or reproducing device in which immediately before a flexible magnetic disk is located in the operative position; that is, the disk is mounted on a spindle, a spindle driving circuit is automatically energized so as to spin the spindle and after a predetermined time interval the driving circuit is automatically de-energized, whereby the step for locating and holding the disk in the operative position can be much facilitated, wear of rotating parts can be minimized and the power consumption can be reduced.
Inventors
- 👤 Nobuyasu Teramura
- 👤 Hiroshi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:32
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/02; G11B19/10; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/03; G11B19/06; G11B19/20; G11B19/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A magnetic disk recording and/or reproducing device of the type in which a magnetic disk clamping means locates and holds a flexible magnetic disk accurately concentric with the axis of rotation of a spindle which is spinning, characterized by a sensor means adapted to detect the insertion of a flexible magnetic disk into said recording or reproducing device and generate an output detected signal, a timer means energized in response to said output detected signal from said sensor means and de-energized after a predetermined time interval, and a switching means adapted to be energized in response to an output signal from said timer, thereby closing and opening a drive circuit for driving a motor for spinning said spindle.
Claim 2
Dependent Claim
118 words
A magnetic disk recording and/or reproducing device of the type in which a magnetic disk clamping means locates and holds a flexible magnetic disk accurately concentric with the axis of rotation of a spindle which is spinning, characterized by a sensor means adapted to detect the insertion of a flexible magnetic disk into said recording or reproducing device and generate an output detected signal, a timer means energized in response to said output detected signal from said sensor means and de-energized after a predetermined time interval, and a switching means adapted to be energized in response to an output signal from said timer, thereby closing and opening a drive circuit for driving a motor for spinning said spindle.
Claim 3
Dependent Claim
62 words
A magnetic disk recording and/or reproducing device as set forth in claim 1 wherein said sensor means is adapted to detect a flexible magnetic disk when the latter is inserted into an aperture or window of a housing or casing of said recording or reproducing device and to generate an output detected signal in response to which said timer means is energized.
Claim 4
Dependent Claim
49 words
A magnetic disk recording and/or reproducing device as set forth in claim 1 wherein said sensor means is adapted to generate an output signal upon depression of a lever carrying said clamping means, and said timer means is energized in response to said output signal from said sensor means.
Claim 5
Dependent Claim
51 words
A magnetic disk recording and/or reproducing means as set forth in claim 2 wherein said sensor means includes means responsive to the configuration of the inserted flexible magnetic disk for detecting whether the inserted flexible magnetic disk is a read-only memory or a memory upon which can be stored new data.
References Cited (Backward Citations)
US4040107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-07 | 1986-09-06 | 1987-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-07 | 1990-09-06 | 1991-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-07 | 1994-09-06 | 1995-03-08 | $7700.00 | Window Closed / Lapsed |