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Mechanical Head Load Interlock

IP.com Disclosure Number: IPCOM000053759D
Original Publication Date: 1981-Nov-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Fournier, TR Harker, DL [+details]

Abstract

In a flexible magnetic disk file drive an interlock is frequently provided to prevent head loading when a disk is not present. This may take the form of a lever arm 4, which is part of the carriage and must rotate counterclockwise. This link is spring-loaded in a counterclockwise direction, as seen in Fig. 1, and is held up by bar 1, keeping the heads unloaded. With media in the diskette drive, lever 5 is moved to the full line position shown, allowing head load. When solenoid 8 is energized, plunger 6 moves downward, pulling lever 2 with it and moving bar 4, which is connected to lever 2, downward. This linkage movement allows lever arm 4 to rotate in a counterclockwise direction, and the read/write heads load onto the media.