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Threaded Cotter Pin for Security

IP.com Disclosure Number: IPCOM000108855D
Original Publication Date: 1992-Jun-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 1 page(s) / 56K

Publishing Venue

IBM

Related People

Rachui, RA: AUTHOR

Abstract

In some external boxes seven visible screws (1) hold the power supply (2) and flanges of the adjustable skid (3) (housing the device) and rear panel (4) to the base (5). These seven screws if completely removed could allow removal of the base (5) and access to the device.

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Threaded Cotter Pin for Security

      In some external boxes seven visible screws (1) hold the power
supply (2) and flanges of the adjustable skid (3) (housing the
device) and rear panel (4) to the base (5). These seven screws if
completely removed could allow removal of the base (5) and access to
the device.

      Disclosed is a split deformable threaded fastener (6) that
restricts removal after deforming.  The special fastener has an
extended length with a cotter pin profile (see figure).  The threaded
cotter pin fastener replaces one or more of the seven base screws
(1).  Preferably one of the screws is used to sandwich the adjustable
skid (3) and the rear panel (4) to the base (5).  These screws are
not torqued down until adjustment of the device bezel (7) to the
front bezel (8) has been made.  Prior to the top cover attachment (9)
and ensuing device bezel adjustment, the cotter pin portion of the
threaded fastener is deformed (see figure), whereas complete removal
of these fasteners is prevented but does not handicap adjustment of
the skid.

      Disclosed anonymously.