| 摘要 |
The invention provides that a two conductor electric blanket has a meltdown layer between the conductors, and this meltdown layer is of a Negative Temperature Characteristic (NTC) as regards its resistance. A control circuit is coupled to the conductors and when there is overheating, the NTC layer allows a leakage current to flow between the conductors, before the meltdown layer actually melts, to stop the supply of power to the conductors, whereby melting of the meltdown layer (which destroys the future utility of the blanket) is avoided, and the blanket can be reused. |
