Velocity correction apparatus for disc record player

Details Velocity correction apparatus for disc record player Velocity correction apparatus for disc record player

1982-04-08

1984-11-06

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

369126, 369170, 369256, G11B 2126

Patent

active

044816146

ABSTRACT:
A velocity correction apparatus for a disc record player includes a permanent magnet attached to a cartridge mounted pickup arm and an electromagnetic coil secured in a cartridge supporting carriage. The coil is fixed to a supporting member which conformally engages structural features of the cartridge to guarantee proper alignment of coil and magnet. The coil support is mounted to permit limited rotation thereof to facilitate installation of the cartridge in the carriage and is mechanically biased to maintain coil-cartridge engagement and to maintain the cartridge in its normally operative position in the carriage.

REFERENCES:
patent: 3917903 (1975-11-01), Taylor et al.
patent: 3956581 (1976-05-01), Taylor
patent: 3983318 (1976-09-01), Miller et al.
patent: 4030124 (1977-06-01), Allen
patent: 4160268 (1979-07-01), Goto et al.
patent: 4170783 (1979-10-01), Tajima
patent: 4366563 (1982-12-01), Riddle

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