Magnetic tape player comprising electromagnetic latch device

Details Magnetic tape player comprising electromagnetic latch device Magnetic tape player comprising electromagnetic latch device

1978-07-12

1980-02-05

Wolff, John H.

Dynamic magnetic information storage or retrieval

Miscellaneous

G11B 1902, G11B 1502

Patent

active

041875222

ABSTRACT:
A latch device latches a fast forward button when the same is depressed. A sensor releases the latch device and thereby the fast forward button upon sensing a blank area on a magnetic tape. The latch device comprises a ferromagnetic lever which is pivotally connected to the fast forward button and is engageable with a magnet when the fast forward button is in the depressed position. The lever is configured to provide a mechanical advantage for holding the fast forward button in the depressed position. The magnet may be an electromagnet which is de-energized when the sensor senses the blank area on the tape. Alternatively, the magnet may be a permanent magnet and an electromagnet provided to neutralize the force of the permanent magnet on the lever when the electromagnet is energized.

REFERENCES:
patent: 3893184 (1975-07-01), Ishigami

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