Patent ID: 6116230
Filing Date: 2000-09-12
Classification: A47J,F23Q,F24C,G07F

Abstract:
A gas appliance comprising:a burner adapted to burn a fuel and produce a flame;a conduit connected to a source of said fuel and adapted to convey said fuel to said burner;a pulse width modulated signal generator circuit;a control circuit in electrical communication with said pulse width modulated signal generator circuit, said control circuit adapted to command said pulse width modulated signal generator circuit to generate a pulse width modulated signal;a valve interposed on said conduit between said source of said fuel and said burner and in electrical communication with said pulse width modulated signal generator circuit, said valve adapted to be adjusted to positions between and including a fully closed position and a fully open position in response to the duty cycle of said pulse width modulated signal; anda switching device adapted, on demand, to switch on and off a flow of said pulse width modulated signal to said valve;wherein said valve substantially linearly alters the flow rate of fuel when adjusted by the duty cycle of said pulse width modulated signal.