Magnetic tape reel write protect mechanism

Details Magnetic tape reel write protect mechanism Magnetic tape reel write protect mechanism

1982-12-22

1985-08-13

Cardillo, Jr., Raymond F.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

360132, G11B 1504

Patent

active

045353700

ABSTRACT:
A mechanism to protect a reel of tape against the risk of inadvertent over-writing or erasure, including an actuator installed in the reel hub and rotatable between two angular positions from the front face of the reel, even when mounted on a tape drive. The axis of rotation of the actuator is offset from that of the reel, and the actuator has a peripheral portion that presents a sloping surface toward the rear of the reel, to engage an axially movable rod disposed along the reel axis. Rotation of the actuator from one angular position to another causes axial movement of the rod, which is conventionally detected and employed to control the write protection status of the tape reel.

REFERENCES:
patent: 2594848 (1952-04-01), Begun
patent: 2761017 (1956-08-01), Camras
patent: 3417387 (1968-12-01), Rayfield
patent: 3564155 (1971-02-01), Pendleton
patent: 4063292 (1977-12-01), Karsh

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