Variable speed tone arm control system

Details Variable speed tone arm control system Variable speed tone arm control system

1980-10-03

1982-07-27

Shepperd, John W.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369 41, 369221, 369215, 369230, G11B 308

Patent

active

043421083

ABSTRACT:
A tone arm control system includes first and second manually operated keys for providing input signals to a control circuit. The control circuit detects which one of the keys is operated and drives a vertical motor in the tone-arm upward direction and subsequently drives a horizontal motor in a tone-arm horizontal direction depending on which one of the keys is detected as being operated. The control circuit includes a counter which starts counting clock pulses to detect when a predetermined count is reached. During the predetermined count period the horizontal motor is energized at a low voltage to move the tone arm at a relatively low speed. When the clock count exceeds the predetermined value the speed of the tone arm is increased to allow it to speedily approach a desired position located relatively remote from the tone arm.

REFERENCES:
patent: 3573809 (1971-04-01), Magnien
patent: 4184687 (1980-01-01), Wren et al.
patent: 4202549 (1980-05-01), Takeuchi
patent: 4262912 (1981-04-01), Nakai
patent: 4266783 (1981-05-01), Milutzki et al.

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