Head interlock mechanism

Details Head interlock mechanism Head interlock mechanism

1980-06-13

1982-11-23

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 5016

Patent

active

043608442

ABSTRACT:
A disc drive including a rotatable interlock mechanism which, in the absence of disc insertion, maintains separation between adjacent read/write heads regardless of the position of the door latch of the disc drive. With no disc inserted and with the door latch closed, the interlock mechanism is held by a soft spring in a support position which limits movement of the moveable head support arm toward the fixed head such that contact between the heads cannot occur. Upon opening of the door latch, to facilitate disc insertion, the moveable head is lifted to a position further from the fixed head due to the disc clamping assembly contacting the protruding finger of the moveable head support arm. When a disc is inserted into the drive, an edge of the disc (actually the disc jacket) contacts a portion of the interlock mechanism and rotates the interlock mechanism to a neutral position in which it no longer supports the moveable head support arm, whereby, upon closure of the door latch the heads can load against the opposing surfaces of the inserted disc. Upon withdrawal of the disc, the interlock mechanism is free to rotate under the action of the soft spring from its neutral position to its support position.

REFERENCES:
patent: 3702997 (1972-11-01), Jamleson
patent: 3770908 (1973-11-01), Craggs
patent: 3797033 (1974-03-01), Prieur
patent: 3975774 (1976-08-01), Helbers
patent: 4179718 (1979-12-01), Rolph
patent: 4253125 (1981-02-01), Kanamuller
IBM Tech. Disc. Bull., Bosier, Door Opening Mechanism for Magnetic Disk Cartridge, vol. 22, No. 6, Nov. 1979, pp. 2501-2503.

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