Safety ignition device notably for burner valve

A safety ignition device for operation in combination with a valve for a gaseous fuel burner, comprising an elongate valve body having an axial bore, a gaseous fuel supply conduit opening into said bore, a fuel injector recess opening into said bore at a location spaced from said fuel supply conduit, an annular valve seat in said bore between said fuel supply conduit and said fuel injector recess, a valve member movable in said bore between a closed position in which it is seated on said valve seat and an open position in which it is unseated to permit flow of fuel from said fuel supply conduit to said fuel injection recess, means biasing said valve member to closed position, a thermocouple in position to be heated by said burner, a magnetic head at one end of said valve body and operable on said valve member when energized to hold said valve member in open position, means connecting said magnetic head with said thermocouple to be energized when said thermocouple is heated by said burner, a control box at the opposite end of said valve body, a magnetic coil in said control box coaxial with said valve body box, a plunger core movable axially in said magnetic coil, force transmitting means between said plunger core and said valve member to move said valve member to open position when said magnetic coil is energized, and electric circuitry sealed in said control box comprising gas ignition spark generating means and means for energizing said magnetic coil and said ignition spark generating means, including rectifying means, means for supplying alternating current to said rectifying means, a grounding lug and means for protecting said circuitry against transient voltage surges and for stabilizing the pressure, said protecting means comprising a varistor connected in circuit with said rectifying means.