Pickup arm with servo-controlled stylus

Details Pickup arm with servo-controlled stylus Pickup arm with servo-controlled stylus

1981-05-01

1983-11-01

Konick, Bernard

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Electrical modification or sensing of storage medium

369 43, 369170, 369215, G11B 2110, G11B 906

Patent

active

044133340

ABSTRACT:
A capacitance detection type stylus is attached to the free end of a cantilever which is supported on a vertically movable resilient pivot. A permanent magnet is fixed to the movable pivot. A servo-control coil is provided adjacent the permanent magnet to move it in response to angular displacement of the cantilever from a predetermined position. The pivot is moved in the direction of fluctuation of a disc record to maintain the stylus in a proper orientation with respect to the record surface.

REFERENCES:
patent: 3830505 (1974-08-01), Rabinow
patent: 4063285 (1977-12-01), Nagaoka
patent: 4170360 (1979-10-01), Ohsawa
patent: 4320487 (1982-03-01), Guarracini et al.
patent: 4325134 (1982-04-01), Langley et al.

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