ELECTRIC BLANKET SAFETY CIRCUIT

摘要

An electric blanket utilizing a positive coefficient material between two conductors as the heating means and having a safety circuit connected to the conductors to blow a fuse in the event of an open circuit condition in the conductors. The safety circuit is connected across each of the two conductors to sense an increase in voltage in response to which a low resistance circuit path is provided causing a current surge which disconnects the heater circuit by blowing the fuse.