Patent ID: 8878683
Filing Date: 2014-11-04
Classification: G08B,Y10T

Abstract:
1. A light receiver device for an optical smoke detector, the light receiver device comprising: a flat substrate having a front side and a back side opposite said front side; a light receiver mounted on said front side of said substrate; and a shielding device configured to shield said light receiver against electromagnetic interference radiation; said shielding device having a front shielding unit and a rear shielding unit; said front shielding unit being disposed on said front side of said substrate and said rear shielding unit being disposed on said back side of said substrate; said rear shielding unit being a metal strip penetrating said substrate from said front side to said back side of said substrate and having a first and second section; said first section extending essentially perpendicular to said surface of said substrate, said second section extending essentially parallel to said surface of said substrate; said light receiver having terminal pins and said second section configured to shield terminal pins of said light receiver against electromagnetic interference radiation that penetrates said substrate.