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Diskette Drive Latch Interlock and Cam Device

IP.com Disclosure Number: IPCOM000085107D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 3 page(s) / 52K

Publishing Venue

IBM

Related People

Baker, RE: AUTHOR [+2]

Abstract

This latch interlock and cam device 8 prevents damage to a magnetic diskette 10 in a diskette drive 12, by limiting movement of a diskette collet 14 toward any other than a position in a central opening 16 of the disk 18 of the diskette 10.

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Diskette Drive Latch Interlock and Cam Device

This latch interlock and cam device 8 prevents damage to a magnetic diskette 10 in a diskette drive 12, by limiting movement of a diskette collet 14 toward any other than a position in a central opening 16 of the disk 18 of the diskette 10.

Diskette 10 is of the type described in U.S. Patent 3,668,658 and comprises a thin disk 18 rotatably disposed within a protective jacket 20. Jacket 20 has an opening 22 surrounding opening 16. Drive 12 includes base plate 24 and clamping plate 26 swingably mounted on base plate 24. Collet 14 is rotatably mounted on clamping plate 26 and moves into rotatable drive hub 34 as plate 26 is swung to its closed position.

Device 8 includes latch 28 swingably mounted at 30 on clamping plate 26. Compression spring 32 yieldably holds latch 28 in its positions as illustrated in Figs. 1 and 2.

Diskette 10 is shown in Fig. 1 as not being fully inserted into drive 12, and the collet center 14a is out of alignment with the disk center 16a. When clamping plate 26 is swung downwardly with diskette 10 being in its Fig. 1 position, the end of latch 28 contacts diskette 10; and the length of latch 28 is sufficient so that collet 14 remains out of contact with diskette 10 so that no damage can occur thereby. The end surface 28a of latch 28 is sufficiently large and blunt so that latch 28 does not damage diskette 10.

Diskette 10 is shown in Fig. 2 inserted farther into drive 12, but diskette 10 is still not in its operative position in alignment with collet 14. Latch 28 has a cam surface 28b; and, with diskette 10 being in its Fig. 2 position, cam surface 28b engages and cams the end of diskette 10 as clamping plate 26 is moved farther toward base plate 24. Ca...