Phonograph turntable control system

US4195846A · kind A · utility

Assignee

• The Braun Corporation · DE

Inventors

• Harry Gaus · Kronberg, DE
• Udo Milutziki · Walldorf, DE
• Dietwald Schotte · Eschborn, DE

Key dates

• Filing date: Jun 7, 1978
• Grant date: Apr 1, 1980
• Expiry date: Jun 7, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B19/02
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

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.