US4414591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual access flexible disk drive
Assignee: International Business Machines Corp
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Filing: 1980-06-18
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Granted: 1983-11-08
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Expires: 2000-06-18
Abstract
Abstract A drive is provided which accepts a cartridge containing a flexible magnetic recording disk and provides for simultaneous transducer access to both recording surfaces of the disk. The cartridge is inserted into a tray in the drive and then rotated in the tray to position both recording surfaces adjacent transducers and to position the disk center on a disk drive member for rotating the disk.
Inventors
- 👤 John W. Wenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:29
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/041; G11B17/043; G11B17/0434; G11B17/022; G11B17/028; G11B17/035; G11B23/00; G11B23/0014; G11B23/0021; G11B23/0028; G11B23/0035; G11B23/02; G11B23/03; G11B23/033
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
A device for mounting a cartridge containing a flexible magnetic recording disk therein, comprising drive means in said device for providing rotational motion to said disk; a pair of transducing means in said device for simultaneously magnetically cooperating with both magnetic recording surfaces of said disk in a non-contact mode; tray means pivotably mounted in said device, said tray means being adapted to receive said cartridge when said tray means is in a first position which is tilted from the horizontal, said tray means being pivotable about an axis which is offset horizontally from the centerline of said drive means to a second horizontal position after insertion of said cartridge therein to position both surfaces of said disk adjacent said transducing means and position a central portion of said disk adjacent said drive means.
Claim 2
Independent Claim
134 words
A device for mounting a cartridge containing a flexible magnetic recording disk therein, comprising drive means in said device for providing rotational motion to said disk; a pair of transducing means in said device for simultaneously magnetically cooperating with both magnetic recording surfaces of said disk in a non-contact mode; tray means pivotably mounted in said device, said tray means being adapted to receive said cartridge when said tray means is in a first position which is tilted from the horizontal, said tray means being pivotable about an axis which is offset horizontally from the centerline of said drive means to a second horizontal position after insertion of said cartridge therein to position both surfaces of said disk adjacent said transducing means and position a central portion of said disk adjacent said drive means.
Claim 3
Dependent Claim
55 words
Apparatus in accordance with claim 1, in which said drive means has an axis of rotation; said tray means being pivotable about a pivot axis which is offset from said axis of rotation, whereby the center of said disk is positioned on said axis of rotation when said tray is pivoted to said second position.
Claim 4
Dependent Claim
40 words
Apparatus in accordance with claim 1, including over-center spring means connected to said tray means and to the frame of said device for providing a maximum loading force to said cartridge when said tray is pivoted to said second position.
Claim 5
Dependent Claim
30 words
Apparatus in accordance with claim 1, including ear means in said device to present pivoting of said tray and said cartridge until said cartridge is fully inserted in said tray.
Claim 6
Dependent Claim
41 words
Apparatus in accordance with claim 1, in which said transducing means are pivotable, including means for pivoting one of said transducing means to maintain said one transducing means clear of said cartridge as said cartridge is inserted in said tray means.
Claim 7
Dependent Claim
40 words
Apparatus in accordance with claim 1, including a shutter mechanism in said cartridge, and tab means in said tray means for engaging a cartridge as it is inserted in said tray means to open said shutter mechanism in said cartridge.
Claim 8
Dependent Claim
63 words
Apparatus in accordance with claim 1, including a rotary actuator for each of said transducing means, each said rotary actuator including a pair of cylindrical magnets and an armature coil positioned in the magnetic flux path of said magnets, said armature coil being connected to said transducing means to position said transducing means at different radial positions on the surfaces of said disk.
Claim 9
Dependent Claim
36 words
Apparatus in accordance with claim 1, including guide openings in said cartridge, and locating pins in said drive for engaging said openings in said cartridge when mounted in said device to accurately position said cartridge therein.
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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |