PURPOSE: To make a commercial electric power source of a gas supply circuit unnecessary and to secure safety to life of a battery, by a method wherein a control valve is made into a selfholding type one and a safety valve opened and held by a slight electric current is combined with the title device.
CONSTITUTION: A safety valve 23, a cock 24 and a selfholding type control valve 25 are inserted in a gas path 22 arriving at a burner 21 in series from an upstream side. As the safety valve 23 and the cock 24 are operated by a knob 28, the safety valve 23 is opened by pressing, then an open state of the valve is kept by a slight electric current to be applied to the valve by a control part 20 and the cock 24 is opened by a rotation. The slight electric current is applied to the safety valve 23 by the control part 20 by making use of a battery 29 and the valve is made to open by feeding instantaneously to a selfholding type control valve 25. As for the selfholding type control valve 25, it is unnecessary to feed continuously. When battery voltage is dropped down to interrupting voltage VS all operations are suspended through interruption by the safety valve 23. An unsafe state resulting from life of the battery is avoided by making voltage VC, for making the selfholding interrupting valve 25 act, into relation giving VS> VC.
AKAMATSU YOSHIO
TAKADA MANABU
