Title: Stylus arm lifting/lowering apparatus for a video disc player system

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.

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Inventors: DeStephanis, Ralph (Middlesex, NJ, US)

Application Number: 667387
Filing Date: 1976-03-16
Publication_date: 1977-11-22
Assignee: RCA Corporation (New York, NY)
Primary Class(es): 369/230
Other Classes:
US Patent Ref:

3272514	Sep, 1966	Heyerdahl	274/23.
3952145	Apr, 1976	Allen	274/37.

Other Refs:
Primary Examiner: Stephan, Steven L.
Assistant Examiner:
Attorney: Whitacre; Eugene M., Meagher; William H., Kulkarni; Dilip A.