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Elastomer Crash Stop for Disk Files

IP.com Disclosure Number: IPCOM000087423D
Original Publication Date: 1977-Jan-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Luoma, RW: AUTHOR [+2]

Abstract

The crash stop includes a pair of elastomer plates 10 and 12 sandwiched between a stationary mounting plate 14 and a pair of outer plates 16 and 18 that function as abutment means for limiting the swinging movement of an access arm 20 carrying magnetic transducers 21 and 22 movable across the surface of a magnetic disk 24. Thus, the shock, in stopping the rotary movement of arm 20 and transducers 21 and 22 in direction A or B, is absorbed, and the transducers 21 and 22 do not crash into the surface of disk 24 as arm 20 and transducers 21 and 22 are stopped in their movement in direction A or B.

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Elastomer Crash Stop for Disk Files

The crash stop includes a pair of elastomer plates 10 and 12 sandwiched between a stationary mounting plate 14 and a pair of outer plates 16 and 18 that function as abutment means for limiting the swinging movement of an access arm 20 carrying magnetic transducers 21 and 22 movable across the surface of a magnetic disk 24. Thus, the shock, in stopping the rotary movement of arm 20 and transducers 21 and 22 in direction A or B, is absorbed, and the transducers 21 and 22 do not crash into the surface of disk 24 as arm 20 and transducers 21 and 22 are stopped in their movement in direction A or B.

Access arm 20 is pivoted on shaft 26 so as to swing in directions A and B. Transducers 21 and 22 are mounted on arm 20 by flat springs 28 and have very thin air bearings with respect to a surface of disk 24, as disk 24 rotates. Pin 30 is fixed in access arm 20 and moves in slots 16a and 18a of plates 16 and 18 respectively, as arm 20 swings. Thin elastomer pads 32 and 34 are provided at the ends of slots 16a and 18a to cushion pin 30 in moving toward the ends of slots 16a and 18a.

As arm 20 moves in direction A or in the opposite direction B toward either end of its swinging movement, pin 30 abuts against the ends of slots 16a and 18a, as defined by elastomer pads 32 and 34. Plates 16 and 18 are moved in the same direction as pin 30 in slots 16a and 18a, and this movement is resiliently limited by elastomer pads 10 and 12, effectively connecting plates 16 and 18 with ...