摘要 |
An automatic safety switch apparatus is provided for interrupting power to an electrical appliance such as a cooking stove after a predetermined period of operation. The apparatus includes a current detector for sensing a threshold current level between a power source and the appliance, a timer responsive to the detector, and a relay driven by the timer for opening a circuit between the source and the appliance. The timer, which can be programmed to provide a maximum interval of time during which the appliance can be safely operated unattended, is automatically reset when the appliance is turned off.
|