Contact Pressure Device for Personal Computers
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
A technique is described whereby an option card support frame, as used to support circuit cards in personal computers, is designed with the required spring tension, so as to meet the required electro-magnetic compatibility (EMC) grounding specifications, when card brackets are installed. The design differs from prior art in that the need for springs welded onto the frame is eliminated as well as separate paint masking operations. When installed, brackets 10, as shown in the figure, are required to maintain contact pressure against frame 11 in order to meet EMC requirements. In prior art, springs or spring plates were welded to frame 11 in order to maintain contact pressure. However, this method required masking the area during painting and required extensive adjustments to mate the spring or spring plate with the bracket.