Patent ID: 9035781
Filing Date: 2015-05-19
Classification: F23D,F23N,F24C,G01P,H01H

Abstract:
1. An apparatus for detecting gas-out conditions of a gas-operated appliance during operation, comprising: (a) a piston carried within a piston cylinder and movable in response to the flow of gas through said piston cylinder between a first position and a second position, said first position and said second position being spaced from one another and defining an intermediate zone therebetween where said piston substantially restricts the flow of gas through said piston cylinder; (b) a first sensor operatively disposed for activation upon movement of said piston to said first position and deactivation upon movement of said piston away from said first position; (c) a second sensor operatively disposed for activation upon movement of said piston to said second position and deactivation upon movement of said piston away from said second position; (d) a gas flow analyzer operatively connected to said first sensor and said second sensor, said gas flow analyzer being configured to detect the difference between the gas-operated appliance running out of gas during operation and the gas to the gas-operated appliance being intentionally turned off by monitoring the time from deactivation of said first sensor to activation of said second sensor.