Video disc player

Details Video disc player Video disc player

1977-04-01

1979-01-23

Stephan, Steven L.

Undertaking

1791003V, 274 2, 358128, G11B 100, G11B 1700

Patent

active

041357213

ABSTRACT:
The spindle motor of a video disc player is simultaneously disengaged from the motor power source and connected to an electromagnetic safety device for maintaining the cover of the player in a safety position by virtue of the induction current generated by the freely spinning motor until the motor speed is reduced to a safe angular velocity. An electromagnetically operated brake powered by the inductive current generated by the motor assists in reducing the motor velocity.

REFERENCES:
patent: 3930653 (1976-01-01), Huff
patent: 3954272 (1976-05-01), Leedom
patent: 4032971 (1977-06-01), Camerik

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