Friction drive for a disc player

Details Friction drive for a disc player Friction drive for a disc player

1995-02-06

1996-10-01

Epps, Georgia Y.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369267, 369270, G11B 2300

Patent

active

055616585

ABSTRACT:
A disc player both translates and rotates a disc using a pair of parallel drive belts contacting opposed edges of a disc. Each drive belt spans a drive pulley and a passive driven pulley. The pulleys are supported on one of two sliding plates. The sliding plates are connected by a pair of pantograph-type rotatable mounting arms such that movement of one drive belt toward the disc forces the other drive belt to move an equal amount toward the disc. Each drive pulley is driven by a motor causing the drive belt to revolve. A spanning portion of each drive belt is urged against the edge of the disc, thereby establishing friction engagement between the belts and the disc such that the disc rotates when the belts rotate. A disc advance control system moves the disc linearly through an optical beam by differing the rotational frequency of one belt relative to the other. Disc advance may be accomplished with, or without, disc rotation. The position of the belts at opposed locations about the circumference of the disc cancels out any linear pressure applied by the belts.

REFERENCES:
patent: 2949308 (1960-08-01), Maxim
patent: 3047297 (1962-07-01), Drake
patent: 3833225 (1974-09-01), Pettersson
patent: 3993315 (1976-11-01), Hansen et al.
patent: 4766587 (1988-08-01), Dons et al.
patent: 5373495 (1994-12-01), Takada
patent: 5463613 (1995-10-01), Forsell

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