Browse Prior Art Database

Safe-Use Sensor for PCMCIA-Type Drives

IP.com Disclosure Number: IPCOM000115418D
Original Publication Date: 1995-May-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Boutaghou, ZE: AUTHOR

Abstract

Disclosed is a method of integrating a shock watch sensor with the disk drive to monitor excessive damage during handling/shipping/use of the disk drive.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 75% of the total text.

Safe-Use Sensor for PCMCIA-Type Drives

      Disclosed is a method of integrating a shock watch sensor with
the disk drive to monitor excessive damage during
handling/shipping/use
of the disk drive.

      Small form factor disk drives are intended for use on the field
not just for desktop applications.  In case of field return of the
drive, the disk drive manufacturer does not have means of determining
whether the damage has occurred before or after the shipping of the
drive.   Proposed here is the integration of a shock watch sensor
with the disk drive to monitor excessive damage during
handling/shipping/use of the drive.

      A shock watch sensor mounted on the casting of the disk drive
undergoes a color change (from white to red for example) after it is
subjected to shock loading in excess of a pre-specified g-level.  The
shock watch sensor contains a red liquid inside a white capsule; the
red liquid is contained in the capsule by capillary action for
example.  The capsule is surrounded by a white porous material.  In
the event that the shock loads overcome the capillary forces, the red
liquid migrates and is absorbed by the white porous material.  An
embodiment of this principle is shown in the Figure.  The capillary
tube can be designed to sense shock in more than one direction by the
addition of orifices in pre-selected directions.  A shock watch
sensor can be designed to trigger at a specific g-level for a
specific duration.  Off-the-shelf sh...