公开(公告)号：CA918814A

公开(公告)日：1973-01-09

申请号：CA71478

申请日：1970-01-06

Applicant: IBM

Inventor： O'BRIAN P L ,  SHATTUCK D C ,  CARDWELL W R ,  LOWRY DENIS E ,  JOHNSON L E

IPC: H05K7/14

Abstract: 1,224,970. Circuit board assemblies. INTERNATIONAL BUSINESS MACHINES CORP. 12 Jan., 1970 [16 Jan., 1969], No. 1357/70. Heading HlR. The invention, a ventilated circuit board assembly for mounting in a machine frame, comprises circuit boards (glass epoxy laminated structure) 17, 19, and frame members 11, 13, 15 (thermosetting filled phenolic resin) secured in a stack so that the circuit boards are trapped by the resilient members 43 on the end frames 11, 15 and abutments 45 on the inside frame 15 thus providing location (pins 63, 64 and holes 65, 66) and vibration damped support for the circuit boards. Rubber cushioning members 41 which may be replaced by dome-shaped rubber bumpers on projections 43 are provided. The circuit boards carry connecting shrouds 53, 75 on the connector projections 73 to effect interconnection and external connection (Figs. 2 and 3, not shown). Additional circuit boards and frame members may be included and ventilation is by convection in the channels formed by the abutment and resilient members.