referring to fig1 an embodiment of the invention is shown in which the hinged lens holder triggering device is incorporated in a welding hood with a hinged lens holder . the welding hood is comprised of the entire assembly as a stationary structure 1 , and the hinged lens holder as a hinged structure 2 . in this embodiment , a locking member 3 , a spring wire such as a piano wire which is stiff and also flexible , is attached on one end by being hooked through a hinged structure 2 , having an opening 4 , then passing through a stationary structure 1 , having an opening 5 , which serves as a guide , then the other end being formed to fit an l shaped stop structure 6 , and interlocking when in the open position as shown in fig1 . when opening , it uses the spring pressure of a locking member 3 , against the stop structure 6 , then they continue to rub together until a full open position , then the formed end of the locking member 3 , snaps up against the stop structure 6 , and remains in place holding the hinged structure 2 , in an open position . a spring 7 , is hooked on one end through hinged structure 2 , having a second opening 8 , the other end is hooked through a stationary structure 1 , having a second opening 9 , a spring 7 , is stretched and pressure applied when the hinged structure 2 , is open . an actuating member 10 , on one end passes through a stop structure 6 , having an opening 11 , which serves as a guide , and is formed in a circle shape 12 , and encircles the locking member 3 . a second hinge 13 , being attached to a stationary structure 1 , and having an opening 14 , through which one end of an actuating member 10 , may pass and hook as a means of attachment and thereby attaching actuating member 10 , to a stationary structure 1 . a slight pressure of the chin against a second hinge 13 , causes the actuating member 10 , to move in a downward motion thereby causing the circle shape 12 , to apply pressure in a downward motion against a locking member 3 , thereby causing a locking member 3 , to unlock from stop structure 6 , thereby causing the stretched and applied pressure of a spring 7 , to be activated causing a hinged structure 2 , to swing in a downward motion until it comes to a stop and is closed . although the invention has been described in its preferred form , it is contemplated that variations in parts , materials , and positions may be resorted to in the details of construction and that in a different embodiment , the stop structure could be moved and the actuating member eliminated and the locking member would be continuous down to a position whereby a second hinge , no longer being attached , could unlock the locking member and that by reversing certain parts , the invention would open , and a voice or electrical actuating means could be used without departing from the spirit and scope of the invention as claimed .
an apparatus for closing a hinged lens holder on the front of a welding hood , without using the hands . the apparatus is a spring loaded mechanism using the chin to actuate it .