Browse Prior Art Database

Method for Increasing Volume of Logic Books

IP.com Disclosure Number: IPCOM000102336D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 3 page(s) / 81K

Publishing Venue

IBM

Related People

Gullicksrud, JT: AUTHOR [+3]

Abstract

Logic books of the type used in some mid-range data processing systems typically contain logic cards or other devices that are limited in size to the overall internal volume within the logic card covers. A typical logic book 1 is shown in Fig. 1. It is comprised of a logic card or other device 2 mounted between two covers 3 and 4.

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Method for Increasing Volume of Logic Books

       Logic books of the type used in some mid-range data
processing systems typically contain logic cards or other devices
that are limited in size to the overall internal volume within the
logic card covers.  A typical logic book 1 is shown in Fig. 1.  It is
comprised of a logic card or other device 2 mounted between two
covers 3 and 4.

      Described is a method of obtaining additional usable volume
within the logic book card covers with no change to the cover design.
The same cover parts may be used for mounting larger cards or devices
as are used to mount the standard-sized hardware they were originally
designed for.

      Referring again to Fig. 1, logic card 2 has attached to it a
bracket 5 used to provide support to the outboard end of the card and
to create an electrical seal around the open end of the book for ESD
(Electrostatic Discharge) protection of the devices inside the
enclosure.  Bracket 5 is located in cover grooves 6, which positively
position the bracket.

      As shown in Fig. 2, this bracket can be modified from a flat
shape to a new bracket 7 incorporating a "U" channel design 8 with
short flanges 9.  Flanges 9 interface as before with cover grooves 6
to provide support.  Logic card 2 can now be extended in length, with
the added portion 10 set inside the "U" channel portion 8 of the
bracket. Bracket 7 may have ears 11 turned down at the open ends to
seal the system from ESD penet...