Electricity: electrical systems and devices – Miscellaneous
Patent
1991-03-11
1993-04-27
Picard, Leo P.
Electricity: electrical systems and devices
Miscellaneous
174 35R, 174 51, 361399, H05K 900
Patent
active
052067963
ABSTRACT:
An electronic instrument is provided with a shielding system consisting of two metallic shields press fitted into plastic instrument case parts without the need for any additional parts to provide electrical and mechanical attachment. In one embodiment, a bottom shield is press fitted onto protuberances inside of a lower case part and electrically connected to a common jack base on a circuit board within the instrument by a vee spring on the bottom shield. A top shield is press fitted into a capturing region of a switch support case part and includes an extension arm and extension ring that is mechanically held by case screws and guides already required by the plastic case. In that position, the extension ring is held in electrical contact with a common pad on the circuit board, the common pad being in electrical contact with a common trace, a common area, and the common jack base.
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Aikins Brian S.
Thompson Bradley H.
Trana Roger M.
Dellett John P.
John Fluke Mfg. Co. Inc.
Picard Leo P.
Smith-Hill John
Sparks D.
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