Safety welding mask

Claim 1

An improved welding hood formed with a viewing window for use by an operator to include electric power for manipulating a first lens relative said viewing window by an operator's chin, said welding hood comprising, a framework integrally secured exteriorly of said welding hood, and said framework including an opening in alignment with said viewing window, and motor means including a drive means mounted within said framework to manipulate said first lens from a first position removed from said viewing window and said opening to a second position aligned with said viewing window and said opening, and first electrical switch means positioned interiorly of said welding hood for actuation by said operator's chin for moving said first lens from said second position to said first position, and wherein a second switch is positioned within said framework for actuating said first lens from said first position to said second position, and wherein said drive means includes a rotatable pinion gear mounted to said motor means and a rack mounted to said lens, and further including a third switch positioned interiorly of said hood and positioned adjacent to and cooperating with said rack to de-energize said motor wherein said rack is integrally secured to said first lens, and said first lens is positioned to said third switch when said viewing lens is in said second position, and wherein a fourth switch is positioned in alignment and underlying said third switch engageable by said rack to de-energize said motor when said first lens is repositioned from said second position to said first position, and wherein said first lens pivots relative to said opening and is mounted to an arcuate gear engageable by said motor means and said arcuate gear includes an integrally secured shut-off arm to engage said third switch when said first lens is in said first position and said first lens pivotal to said second position to engage said fourth switch, and wherein said second switch is a triple pole double throw switch.