| 摘要 |
A safety shut-off system controls power supply to an appliance to prevent accidental fires and the like. The shut-off system includes a shut-o ff switch for connection in series with the power supply of the appliance. A controlle r opens the switch in response to detection by the detector of a prescribed fire condition. Failsafe means are provided on the controller for opening the shut-off switc h in response to a malfunction of the detector to ensure that the appliance is on ly permitted to operator under safe conditions when the detector is properly operating. In order to avoid false alarms the detector may take various forms including the detection of sound or other conditions which may be indicative of a potentia l fire. There are also incorporated switching capabilities to control additional a/c outlets, gas, propane and other appliances which work in unison with this system.</SD OAB>
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