Abstract: A wax shaping tool heating assembly includes a tool holder having a tool holder base, a heat source housing having a housing interior carried by the tool holder base and a tool holder bracket carried by the heat source housing.

Abstract: The vocal circuit for a hand tool includes a circuit board, a switch connected with the circuit board, and a chip and a speaker installed on the circuit board. The hand tool may be a gas-burning soldering device including a fuel reservoir, a soldering iron subject to heat caused via burning fuel flowing from a pipe and an igniter received in the shell for igniting the fuel. The switch of the vocal circuit is located between a button of the igniter and a main switch mounted on the shell. The main switch includes a pin extending into the shell for contact with the switch of the vocal circuit and the button of the igniter through the switch of the vocal circuit.

Abstract: A contact point of a thermocouple sensor is welded to the nose of an iron tip of an electric soldering iron, and sensor wires of the sensor are laid along the surface of the iron tip through a groove to a columnar base of the iron tip. The columnar base of the iron tip is covered, together with the sensor wires situated on its outer surface, with a heater cover. A heater is fitted in an axial bore in the base of the iron tip. The temperature of the iron tip is directly detected by the thermocouple sensor, and on the basis of the detection and a reference temperature, an arithmetic processing is carried out by a signal processor of the temperature controller. Such arithmetic processing is used by the temperature controller to control the electric power supplied to the heater to cause the temperature of the iron tip to coincide with the reference temperature.