Browse Prior Art Database

Board on Cards Circuitry Package

IP.com Disclosure Number: IPCOM000085620D
Original Publication Date: 1976-May-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Flavin, TF: AUTHOR

Abstract

The present structure provides a means by which a card support frame 1 independently supports a group of parallel printed-circuit cards 2, connected to a common circuit board 3 by separable electrical connectors 4.

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Board on Cards Circuitry Package

The present structure provides a means by which a card support frame 1 independently supports a group of parallel printed-circuit cards 2, connected to a common circuit board 3 by separable electrical connectors 4.

The card support frame 1 consists of dual-beam elements 5 which extend from above the card tops downwardly and they are provided at the bottom with horizontal lip portions 6 on which the bottom edges of the cards 2 are seated to support the cards. If necessary, suitable openings may be provided in the beam elements 5 to admit cooling air to cool the heat generating components 7 on the cards 2.

Horizontal spacing between the beam elements 5 is maintained by a stiffener 8 attached to the circuit board 3 or it may be done by a one-piece construction, wherein card socket openings are provided in a horizontal portion joining the two vertical beam element portions together. The location of the board top surface is maintained by the conventionally bonded stiffener 8, or by some direct attachment of the board 3 to the alternative horizontal joining portion.

The cards 2 are biased downward against the horizontal lips 6 of the beam elements 5 by springs 9 which apply sufficient force to exceed anticipated force due to vibration, including that due to vibration testing at resonance.

The beams 5 which envelop the card edges are attached to the portion of the frame 1, which supports the board 3, at some points beyond the ends of the...