Welder's hood

Claim 1

IN A WELDER''S HOOD HAVING A VERTICAL FRONT SECTION PROVIDED WITH A VIEWING APERTURE, A HEAD HARNESS SECURED TO THE HOOD AND ADJUSTABLE SO THAT SAID APERTURE MAY BE DISPOSED IN THE WEARER''S LINE OF VISION, AND A LENS ADAPTED TO SLIDE INTO AND OUT OF ALIGNMENT WITH SAID APERTURE, MECHANISM FOR SO SLIDING SAID LENS; SAID MECHANISM INCLUDING A CHIN-OPERABLE ACTUATOR EMBODYING A SLIDE MEMBER MOUNTED ON SAID HOOD FOR SLIDING MOVEMENT IN A SUBSTANTIALLY VERTICAL PLANE, AND A CHIN EXTENSION PIVOTALLY CONNECTED TO SAID SLIDE MEMBER FOR BODILY MOVEMENTT WITH SAID SLIDE MEMBER AND FOR SWINGING MOVEMENT RELATIVE TO SAID SLIDE MEMBER ABOUT A SUBSTANTIALLY HORIZONTAL AXIS, ADJUSTABLE MEANS ACCESSIBLE EXTERIORLY OF SAID HOOD FOR LIMITING THE EXTENT OF SWINGING MOVEMENT, IN A DOWNWARD DIRECTION, OF SAID CHIN EXTENSION, A CHIN PLATE MOUNTED ON SAID CHIN EXTENSION, MEANS ON SAID CHIN EXTENSION AND SAID CHIN PLATE ACCESSIBLE EXTERIORLY OF SAID HOOD FOR INDEPENDENTLY ADJUSTING THE HORIZONTAL SPACING OF SAID CHIN PLATE FROM SAID FRONT SECTION AND THE ANGULAR ORIENTATION OF SAID CHIN PLATE WITH RESPECT TO SAID CHIN EXTENSION, A PAIR OF LEVERS PIVOTALLY MOUNTED ON SAID HOOD AND OPERATIVELY ENGAGED BY SAID SLIDE MEMBER, SAID LEVERS BEING OPERATIVELY CONNECTED TO SAID SLIDABLE LENS IN A MANNER WHEREBY PIVOTAL MOVEMENT OF SAID LEVERS SLIDES SAID LENS.