| 摘要 |
PURPOSE:To realize a low-price liquid level detector of simple structure, by connecting positive-characteristic temperature-sensitive resistor and alarm device in parallel to the output terminal of a power generating source having drooping characteristics as current-voltage output characteristics. CONSTITUTION:Power generating coil 1 provided to a magnet generator for ignition, etc., equipped to the driving source of an internal combustion engine, etc., generates an AC output voltage between output terminals A and B through the rotation of the magnet generator. Temperature-sensitive resistor 2 with positive characteristics, connected between output terminals A and B in parallel to generating coil 1, generates heat by itself by being turned on with the output of coil 1. Alarm device 3, connected between output terminals A and B in parallel to generating coil 1 as well as temperature-sensitive resistor 2, operates when the output voltage of generator 1 is greater than a prescribed value to put an adequate alarming means such as a lamp into operation. |
