Stylus arm lifting/lowering apparatus for a video disc player sy

Details Stylus arm lifting/lowering apparatus for a video disc player sy Stylus arm lifting/lowering apparatus for a video disc player sy

1976-03-16

1977-11-22

Stephan, Steven L.

Undertaking

274 37, 358128, G11B 906, G11B 302

Patent

active

040592774

ABSTRACT:
A video disc system includes an apparatus for lifting and lowering a stylus arm carrying a stylus. A permanent magnet embedded in a movably mounted element is repelled by an electromagnet to effect lowering of the stylus on a record rotatably disposed on a turntable of the video disc system. A selectively operated circuit is provided to control the rate of increase of voltage across the coil to obtain a smooth landing of the stylus on the record for playback.

REFERENCES:
patent: 3272514 (1966-09-01), Heyerdahl
patent: 3952145 (1976-04-01), Allen

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