Stylus lifting/lowering actuator with improved...

Details Stylus lifting/lowering actuator with improved... Stylus lifting/lowering actuator with improved...

G - Physics

11

B

179/30, 352/33

G11B 3/08 (2006.01) G11B 3/085 (2006.01)

Patent

CA 1143662

RCA 72,078 ABSTRACT A playback system for recovering prerecorded information from a disc record through the use of a stylus mounted on a stylus arm includes a stylus arm lifting- lowering device. The lifting-lowering device uses a permanent magnet mounted on a leaf spring. The permanent magnet is arranged to normally occupy the central volume of a core with a coil wrapped around the core. The leaf spring has an extension to receive the stylus arm. When an appropriate control signal is applied to the coil, a magnetic field is generated which tends to repel the magnet out of the central volume and the stylus arm, which rests on the extension, is gently lowered toward the record.

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