Abstract: An improved ultrasonic wave cosmetic device which is able to protect skin against burns. The ultrasonic wave cosmetic device for treating skin includes a probe head having a skin contact metal surface for contacting the skin to transmit an ultrasonic wave thereto, an ultrasonic wave vibration element for vibrating at an ultrasonic wave frequency in response to an output signal from an ultrasonic wave oscillation circuit, and a temperature sensor mounted in a manner directly contacting a side surface of the ultrasonic wave vibration element and a surface opposite the skin contact metal surface for detecting the temperature of the probe head. The temperature sensor feeds back signals to the oscillation circuit which terminates the oscillation output signal when the probe head gets too hot.

Abstract: A hair iron is provided which includes a hair curling body having an outer peripheral surface on which hairs are wound, a clip for holding the hairs between the inner surface of the clip and the outer peripheral surface of the hair curling body and a heater for heating the hair curling body. The clip is made of low heat conductive materials. A plurality of rib-shaped guards, which extend in a circumferential direction of the hair curling body, are provided at least on an area of the outer peripheral surface of the hair curling body other than the area facing the clip. The guards are made of low heat conductive materials. The guards are disposed at certain spaced intervals in an axial direction of the hair curling body.

Abstract: A power control system for electrical apparatus, in which a unidirectional rectifying device is connected to one of a plurality of loads connected mutually in parallel, an ignition circuit comprising a plurality of resistors is connected between the loads and a switching element whose conduction phase is controllable, and at least one of the resistors in the ignition circuit is connected through the unidirectional rectifying device to the said load, whereby the power supply to each of the plurality of loads can be controlled in an individual manner by means of the single switching element.