Safety device for controllably driving the cassette holder of a

Details Safety device for controllably driving the cassette holder of a Safety device for controllably driving the cassette holder of a

1990-11-14

1992-09-22

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 69, 360137, G11B 1500, G11B 1518, G11B 1560

Patent

active

051502640

ABSTRACT:
Motor control apparatus comprised of a drive circuit for supplying drive current to a motor, an overload detector coupled to the motor for detecting the magnitude of the motor current to produce an output signal if that current exceeds a predetermined threshold level caused by motor overload, and a control circuit coupled to the drive circuit and responsive to the output signal for controlling the drive current supplied to the motor, thereby controlling motor operation.

REFERENCES:
patent: 3994015 (1976-11-01), Tomioka et al.
patent: 4413291 (1983-11-01), Ueki et al.
patent: 4494181 (1985-01-01), Ramlohr et al.
patent: 4644234 (1987-02-01), Nola
patent: 4663573 (1987-05-01), Maetani et al.
patent: 4677356 (1987-06-01), Tsuneda et al.
patent: 4733314 (1988-03-01), Ogawa et al.
patent: 4933790 (1990-06-01), Mitumaru
patent: 4999721 (1991-03-01), Ogawa
patent: 5097378 (1992-03-01), Nakabayashi

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