Quick disconnect card-on-board electronic package assembly

• US 4,131,933 A
• Filed: 04/29/1977
• Issued: 12/26/1978
• Est. Priority Date: 04/29/1977
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Brearley, Lawrence E., Yaple, William R., Agard, Richard L., Bocinski, Terrence E.
• Primary Examiner(s): Smith, Jr., David
• Application Number:
  US05/792,153
• Time in Patent Office: 606 Days
• Field of Search: 361/415, 361/391, 361/413, 339/92 M, 339/17 LC
• US Class Current: 361/801
• CPC Class Codes: H05K 7/1449 with connections to the back board

Abstract

A card-on-board package assembly which comprises a printed circuit board, a board stiffener secured to the board, a card guide assembly fastened to the stiffener, and a plurality of printed circuit cards mounted in the guide assembly to make electrical contact with the board. The cards latch into position in the guide assembly and are connected into the board with a scissors-type movement by captive fastening means which fasten the cards to the stiffener. Individual cards may be easily replaced. The board, board stiffener, card guide, and card assembly is fastened to a gate or frame by captive fastening means and may be quickly and easily removed as a unit and replaced with another one.

Claims

1. A card-on-board electronic package assembly which comprises:

a printed circuit board having a plurality of spring contacts arranged on a surface thereof;

a board stiffener fastened to said circuit board and having a plurality of channels with each channel provided with a contact housing having holes in alignment with contacts on said board;

a plurality of printed circuit cards each having a plurality of blade contacts along one edge and each card being mounted in a card holder;

a card guide frame having a plurality of grooves across the top and bottom for receiving said card holders and cards and guiding the blade contact edges of inserted cards into said channels and contact housings;

captive fastening means associated with each card comprising a screw mounted at the top and bottom of the card with each screw having a retainer clip attached thereto, said screws being effective when tightened one at a time to secure inserted cards to said board stiffener with their blade contacts in engagement with the board spring contacts and operable when loosened to disconnect secured cards from said board stiffener for removal;

a latching tab provided on the top and bottom edge of each card holder and the top and bottom grooves in the card guide frame each have a recessed portion which coact with said tabs to latch inserted card holders against vertical movement and prevent either the top or bottom edge of the cards from lifting when the opposite edge is tightened.