Device for use in helmet for preventing fogging by electric heating

Claim 1

In a helmet removably provided with a shield panel for closing a front opening in the main body of the helmet, a device for preventing the shield panel from fogging by electric heating characterized in that a sup-port plate curved along the shield panel is removably attached at its opposite ends to the inner side of the shield panel by fastening means, a heat generating plate being attached to the support plate and formed with a transparent heat generating electroconductive film by vacuum evaporation substantially over the entire surface thereof, a pair of upper and lower electrodes being formed in parallel on the electroconductive film along the upper and lower edges of the film and extending sub-stantially over the entire length of the film, one of the pair of electrodes having an extension positioned on one side thereof opposite to the other electrode and extending from one end of said one electrode toward the other end thereof, the electroconductive film being sep-arated by a cut line between said one electrode and the extension thereof, a pair of power supply lead wires being connected at one end of the support plate to the extended end of the extension and to one end of said other electrode, the pair of electrodes being formed from an electrically conductive coating composition incorporating an electrically conductive metal power.