Welding mask with automatic obscuring of the visual field

Claim 1

In a welding mask for carrying out arc welding, comprising an opaque shell, a vision window in said opaque shell, a movable frame having at least one obscured glass arranged in said vision window for displacement between a position of inactivity and a position of activity in which it obscures said vision window, a housing separate from said opaque shell, an actuation means arranged within said housing, a sheath connected at one end to said opaque shell and at the other end to said housing, and a flexible cable connected at one end to said movable frame and at the other end to said actuation means, said sheath and flexible cable forming a transmission means for displacing said movable frame under action of said actuation means; the improvement that said actuation means comprises an electromagnet having an electric winding adapted to be connected to the electric circuit of an arc welding apparatus, and an anchor cooperable with said electromagnet, and bayonet joint means inserted between said sheath and said housing as well as between said flexible cable and said anchor, whereby said housing with the actuation means can be connected and disconnected by a single operation to and from said transmission means and opaque shell.