Patent ID: 9693399
Date: 2017-06-27
CPC Classifications: F27D,G01K,G01R,H05B

Claim:
1. A method of detecting the presence of a molten metal adjacent to the exterior surface of a bushing in an induction channel furnace, the method comprising the step of forming an electrical circuit from a voltage source electrically connected to an arrangement of spaced apart and interconnected electrical conductors disposed at least partially around the exterior surface of the bushing, the voltage source connected to an electric ground potential, the arrangement of spaced apart and interconnected electrical conductors separated from a molten metal channel in the induction channel furnace by a refractory, the molten metal channel containing the molten metal at the electric ground potential, and the molten metal adjacent to the exterior surface of the bushing flowing from a breach in the refractory from the molten metal channel.