Patent ID: 8740419
Filing Date: 2014-06-03
Classification: F21V,F21W,F21Y

Abstract:
1. An electrical signal circuit assembly for use in locations at risk of explosion, the assembly comprising: a hermetically sealed housing formed with a cutout and entirely of plastic; at least one circuit board of thermally conductive material inside the housing; at least one light source inside the housing on the circuit board; a cooling element fitted in the cutout and having an outside part at least partially outside the housing and exposed to and in contact with the atmosphere outside the housing and an inside part inside the housing and forming an attachment flange carrying and in thermal contact with the circuit board; at least one heat pipe inside the housing and thermally connecting the inside and outside parts of the cooling element for transmitting heat from the inside part to the outside part for dissipation to the atmosphere outside the housing; and at least one body of insulating-plastic potting compound filling the housing around the circuit board, light source, inside part of the cooling element, and heat pipe.