Patent Number: 6,168,418

Title: Ignition system with delay switch for a gas appliance

Abstract: An ignition system for a gas appliance comprises an ignitor for igniting gas, a gas valve which controls the flow of gas to the ignitor, and a delay switch which delays the opening of the gas valve. The delay switch comprises a piston and a cylinder which define a chamber. The piston moves between a first position and a second position in the cylinder. The piston is coupled to the gas valve such that when the piston reaches the second position, the gas valve is opened. The chamber includes a large aperture and a small aperture which influence the rate at which the piston moves. The large aperture includes a sealing member which seals the large aperture when the piston moves from the first position to the second position to resist the motion of the piston. The large aperture is opened when the piston moves in the other direction. The delay switch is connected to the ignitor such that when the ignitor is turned on, the piston moves against air resistance and delays the opening of the gas valve. When the ignitor is turned off, the piston moves quickly in the other direction to deactivate the gas valve.

Inventors: Levinson; Lionel Monty (Niskayuna, NY)

Assignee: General Electric Company

International Classification: F23N 5/20 (20060101); F23N 1/00 (20060101); F23N 005/20 (); F23N 005/22 ()

Expiration Date: 01/02/2018