Combined thermocouple and thermopile capable of generating multiple EMF signals

摘要

A combined thermocouple and thermopile capable of producing multiple EMF signals. The combined thermocouple and thermopile construction is particularly adapted for use as an electric generator capable of producing multiple EMF signals and able to respond faster to changes to the presence or absence of a pilot or gas burner flame. The conductors of the thermopile are comprised of dissimilar metals joined at each end to form hot and cold thermocouple junctions. The thermopile may provide multiple EMF signals when a third wire lead is affixed to a cold junction between either end of the array. The array of thermocouples is formed in a circle and enclosed in a metal sleeve or jacket. A thermocouple assembly comprised of a standard ferric chrome, nickel chrome or inconel tip; an insulated constantan wire longitudinally centered within and permanently connected to the tip; an insulated copper extension wire permanently affixed to the constantan wire and an insulated copper wire permanently affixed to the outside of the tip; is longitudinally centered within and isolated from the thermopile array contained within a metallic sleeve. The tip of the thermocouple is positioned near but isolated from the thermopile array and metallic sleeve to prevent thermal conductance through the sleeve.