Abstract: A photovoltaic module has solar cells electrically interconnected by string ribbons and bus ribbons adhered to a dielectric strip are located on both ends of the solar cell strings and are electrically connected to the string ribbons. The bus ribbon assembly includes a dielectric strip having a length for disposal coextensively with the photovoltaic module side and the bus ribbons are configured on the dielectric strip to register with corresponding string ribbons when the dielectric strip is disposed coextensively with the photovoltaic module.

Abstract: A cold trap includes a set of baffles cooled by the cold finger of a closed cycle refrigerator. The baffles are vertically disposed in a vertical fluid conduit with frustoconical and conical surfaces for directing liquid to a circular trough during regeneration. After the liquid is collected, it is blown from the trough through a pressure relief valve by a nitrogen purge. The trough is formed in the upper surface of a connecting flange at the lower end of the fluid conduit.