High temperature externally heated hair-styling devices

摘要

A high temperature externally heated hair-styling device is provided which has a hair-styling body. An over-temperature alarm is mounted in the hair-styling body. The over-temperature alarm has a temperature sensor which is thermally connected to the hair-styling body. The sensor provides a voltage signal representative of the temperature of the hair-styling body. A variable reference voltage signal generator is powered by a DC battery power source. The reference signal generator has an adjustable range and the reference voltage signal is calibrated to coincide with a predefined operating temperature range. A comparative device comparing the representative and reference voltage signals is used to determine when the predefined operating temperature range is exceeded. An indicator device responsive to the comparative device is used to indicate a temperature of the hair-styling body exceeding the predefined operating temperature range of the hair-styling body. An on/off switch is used to connect or disconnect the reference voltage signal generator from the DC power source.