Welder's helmet

Claim 1

IN A WELDER''S HELMET, IN COMBINATION: (A) A FACE SHEILD FORMED WITH A SIGHT OPENING, SAID SHIELD HAVING A TERMINAL TOP PORTION AND A TERMINAL BOTTOM PORTION; (B) FASTENING MEANS ON SAID SHIELD FOR FASTENING SAID TOP PORTION TO THE HEAD OF A WEARER IN A FACE PROTECTING POSITION IN WHICH THE LINE OF VISION OF THE WEARER PASSES THROUGH SAID SIGHT OPENING; (C) A COVER MOUNTED ON SAID SHIELD FOR MOVEMENT TOWARD AND AWAY FROM AN OPERATIVE POSITION IN WHICH SAID COVER EXTENDS TRANSVERSELY OF SAID LINE OF VISION OVER AT LEAST A MAJOR PORTION OF SAID OPENING, AND AN INOPERATIVE POSITION; (D) A TWO-ARMED LEVER MEMBER PIVOTED ON SAID SHIELD FOR ANGULAR MOVEMENT ABOUT AN AXIS EXTENDING SUBSTANTIALLY IN THE DIRECTION OF SAID LINE OF VISION; (E) MOTION TRANSMITTING MEANS CONNECTING ONE ARM OF SAID LEVER MEMBER TO SAID COVER FOR MOVING SAID COVER BETWEEN SAID POSITIONS THEREOF WHEN SAID LEVER MEMBER PIVOTS ABOUT SAID AXIS; (F) A CONTROL MEMBER MOUNTED ON THE OTHER ARM OF SAID LEVER MEMBER FOR ANGULAR MOVEMENT THEREWITH ABOUT SAID AXIS AND EXTENDING BEYOND SAID BOTTOM PORTION A DISTANCE SUFFICIENT FOR ENGAGEMENT WITH THE CHEST OF THE WEARER WHEN THE LATTER LOWERS HIS HEAD; AND (G) STOP MEANS ENGAGEABLE WITH SAID OTHER ARM FOR LIMITING SAID ANGULAR MOVEMENT OF SAID LEVER MEMBER, (1) SAID STOP MEANS INCLUDING DETENT MEANS FOR RELEASABLY LOCKING SAID OTHER ARM IN A POSITION IN WHICH SAID COVER IS IN ONE OF SAID POSITIONS THEREOF, AND (2) SAID OTHER ARM BEING MOVABLE IN THE DIRECTION OF SAID AXIS FOR RELEASE FROM SAID DETENT MEANS, (3) WHEREBY SAID COVER MAY BE MOVED FROM SAID ONE POSITION TO THE OTHER POSITION THEREOF BY THE WEARER LOWERING HIS HEAD UNTIL THE CONTROL MEMBER ENGAGES HIS CHEST, THEREAFTER MOVING THE HEAD RELATIVE TO THE CHEST UNTIL THE OTHER ARM OF SAID LEVER MEMBER IS RELEASED FROM SAID DETENT MEANS, AND THEN TURNING HIS HEAD.