Importance

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Abstract

A power meter device having a transparent part and an electronic signal transmitter to permit remote meter reading has a thermal and electromagnetic interference shield for protecting the electronic transmitter means from high temperatures and r.f. interference. The shield comprises a metal-organic laminate of black and white polyester layers bonded to respective opposite sides of an aluminum foil so a portion of the foil is exposed by the black polyester along a top edge of the laminate, so portions of the black and white polyesters extend beyond the foil and are bonded together along a bottom edge of the laminiate, to provide a slit near one strip end and an interlocking or detent flap at an opposite strip end and to provide integral ground and mounting tabs in the portion of the metal foil exposed by the black polyester. The blanked strip is formed into cylindrical configuration with the white polyester on its outer surface by fitting the detent flap into the slit; the bonding of the extending white and black polyester portions electrically isolates the bottom edge of the foil; and the tabs are secured to stud means to dispose the shield cylinder around the electronic components of the device inside the transparent housing part for thermally shielding those components and for electrically grounding the metal foil to electromagnetically shield the electronic components.

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First Claim