US4782473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive control method for multi-disk player
Assignee: Pioneer Corp
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Filing: 1987-10-22
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Granted: 1988-11-01
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Expires: 2007-10-22
Abstract
Abstract A method for operating a disk player to eliminate jammed disks and allow continued playing. When it is sensed that a disk after completing playing has not been returned to its magazine, the disk moving mechanism is operated to try to move the disk in the direction so as to pull it out of the magazine. This usually frees the disk and allows playing of the next disk in sequence. If, however, the disk is not then returned to the magazine, the player is disabled.
Inventors
- 👤 Naoki Masaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:33
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/05; G11B17/053; G11B17/056; G11B17/22; G11B17/228; G11B19/00; G11B19/02; G11B19/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
In drive control method for a multi-disk player in which a plurality of disks are housed in a magazine and said disks are sequentially extracted from said magazine and played, in which player there are provided a disk changing mechanism which pulls said disk out of said magazine and returns said disk into said magazine, a motor for driving said mechanism, a motor drive circuit for driving said motor, and a controller which supplies a control signal to said motor drive circuit are provided, the improvement comprising the steps of: performing reverse driving of a disk having completed playing in a direction to pull said disk out of said magazine if the return of said disk to said magazine is not completed within a predetermined time after said disk has completed playing, and returning said disk into said magazine after said disk is pulled out of said magazine.
Claim 2
Dependent Claim
148 words
In drive control method for a multi-disk player in which a plurality of disks are housed in a magazine and said disks are sequentially extracted from said magazine and played, in which player there are provided a disk changing mechanism which pulls said disk out of said magazine and returns said disk into said magazine, a motor for driving said mechanism, a motor drive circuit for driving said motor, and a controller which supplies a control signal to said motor drive circuit are provided, the improvement comprising the steps of: performing reverse driving of a disk having completed playing in a direction to pull said disk out of said magazine if the return of said disk to said magazine is not completed within a predetermined time after said disk has completed playing, and returning said disk into said magazine after said disk is pulled out of said magazine.
Claim 3
Dependent Claim
40 words
The method of claim 1, further comprising the step of rendering said player inoperative if, after said step of reverse driving, said disk is not returned to said magazine within said predetermined time, to deactivate further operations of said player.
Claim 4
Dependent Claim
13 words
The method of claim 1, wherein said disk is carried by a tray.
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) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |