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Head Protect Interposer Disclosure Number: IPCOM000063200D
Original Publication Date: 1985-Feb-01
Included in the Prior Art Database: 2005-Feb-18

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Related People

Janssen, DM Kirton, AJ Murphy, RM [+details]


The device shown in Figs. 1 and 2 prevents the upper and lower read/ write heads of a floppy diskette drive from coming into contact when a diskette is not loaded. The mechanism consists of interposer 10, upper plate 11, and head load spring 12. When a diskette is not present, interposer 10 is in a vertical position, as shown in Fig. 2A. This position is maintained by the action of leg 13 (Fig. 1) of the interposer which acts as a torsion spring to load the interposer against a stop. If the drive's operating handle (not shown) is closed with the interposer in this position, head load spring 12 is blocked by the interposer before the upper head is fully lowered, thus preventing contact between the heads. When a diskette is installed, the interposer 10 is rotated clock wise (Fig. 2B) and lays on top of the diskette jacket.