Phonograph turntable control system

Details Phonograph turntable control system Phonograph turntable control system

1978-06-07

1980-04-01

Haroian, Harry N.

Undertaking

G11B 1706

Patent

active

041958462

ABSTRACT:
When a touch-activated switch unit is touched a first time, a platter-motor flip-flop arrangement assumes its motor-operate state, and when the switch unit is touched a second time, the flip-flop assumes its motor-not-operate state. A tone-arm swing-in flip-flop assumes its swing-in state when the platter-motor flip-flop assumes its motor-operate state. A tone-arm swing-out flip-flop assumes its swing-out state when the platter-motor flip-flop assumes its motor-not-operate state. A signal-transmission switch closes the transmission path between the swing-in and swing-out flip-flops and the electrical drive of the tone-arm swing mechanism, but only when the tone-arm lift mechanism has lifted the tone arm to raised position. A touch-activated lift-tone-arm switch is operated when touched for generating a lift-tone-arm command signal. An OR-gate has an output connected to the tone-arm lift mechanism for activating the latter in response to the lift-tone-arm command signal, in response to assumption of the swing-in state by the swing-in flip-flop, and in response to assumption of the swing-out state by the swing-out flip-flop.

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