EMI reducing circuit card apparatus

Details EMI reducing circuit card apparatus EMI reducing circuit card apparatus

1989-05-16

1991-02-05

Tolin, Gerald P.

Electricity: electrical systems and devices

Miscellaneous

174 35GC, 211 41, 361415, H05K 900

Patent

active

049910620

ABSTRACT:
A circuit card comprises a printed wiring board, a plastic faceplate therefor, and a resilient electroconductive sheet metal strip extending the length of such plate and fastened to its rear side. The strip at its opposite ends provides spring contacts electrically coupled by the strip's middle part. The card is adapted to be inserted in a holding bay with a rectangular front opening of greater width than height and bordered at its top and bottom by designation strips for the cards to be put in such bay. Metallic structural means adjacent the opening provides an a.c. circuit path extending around the opening in a closed loop. When the card is inserted in the bay, the spring contacts engage with metal-surfaced regions on the designation strips to provide an electrical shunt across such loop and, thereby, to reduce electromagnetic interference radiating through such opening from the bay's interior.

REFERENCES:
patent: 4384165 (1983-05-01), Loving, Jr.
patent: 4631641 (1986-12-01), Brombal
patent: 4713633 (1987-12-01), Saito
patent: 4758928 (1988-07-01), Wierec
patent: 4762966 (1988-08-01), Kosanda
patent: 4780570 (1988-10-01), Chuck
patent: 4821145 (1989-04-01), Corfits
patent: 4872212 (1989-10-01), Roos

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