Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1992-06-11
1994-03-15
Bradley, Paula A.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
174 35R, H05K 900
Patent
active
052950468
ABSTRACT:
A control panel for a television digital special effects device comprises a plastic shroud that has an internal conductive coating and defines a key panel cavity. A key panel plate fits within the key panel cavity. A thin stainless steel EMI screen is adhesively bonded to the upper surface of the key panel plate and an overlay sheet is adhesively bonded to the upper surface of the EMI screen. Apertures for the keys, controls and displays of the control panel are present in registration in the key panel plate, the EMI screen and the plastic overlay. The EMI screen has a main body with fingers projecting from its periphery. The dimensions of the main body of the EMI screen are smaller than the corresponding dimensions of the key panel cavity in the plastic shroud, while the finger-tip-to-finger-tip dimensions of the screen are larger than those corresponding dimensions. Thus, as the plastic shroud is pressed down over the key panel sub-assembly during assembly, the fingers are bent into firm contact with the conductive coating on the interior of the plastic shroud, thereby providing good electrical contact between the EMI screen and the conductive coating of the plastic shroud, which also serves an EMI shielding function.
REFERENCES:
patent: 4810830 (1989-03-01), Komine et al.
patent: 5134245 (1992-07-01), Katz
patent: 5139850 (1992-08-01), Clarke et al.
patent: 5170009 (1992-12-01), Kadokura
patent: 5204807 (1993-04-01), Simkins et al.
Knauber Steven K.
Pechin John D.
Bradley Paula A.
Gray Francis I.
Smith-Hill John
The Grass Valley Group Inc.
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