| 摘要 |
A safety apparatus for use with a gas burner having a thermoelectrically activated on-off safety valve for controlling gas flow to the burner, a governor for maintaining constant gas pressure to the burner, a gas channel interconnecting safety valve and governor, and a thermocouple for generating a thermoelectromotive force in the presence of a flame to electrically maintain the safety valve in an open position, is disclosed. The safety apparatus includes a gas pressure operator for sensing a predetermined excessive pressure within the gas channel and which initiates a shut-off of the gas supply to the burner upon sensing the high pressure gas in the channel. A connecting device is electrically connected to a solenoid in the safety valve for controlling the on/off position of the safety valve and is electrically connected to the thermocouple. An operation sensing device is in communication with the gas pressure operator such that when in the presence of the predetermined high gas pressure the gas pressure operator senses such high pressure gas in the channel and activates the operation sensing device to electrically disconnect the generated thermoelectromotive force supplied to the safety valve such that the safety valve moves to an off position thereby stopping the flow of gas within the channel and extinguishing the flame at the burner.
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