Gripper jaw insert mistake detector

Claim 1

A mistake detecting gripper jaw inserting device comprising: a gripper arm suitable for clockwise and counterclockwise rotation about one end to and from an insert pickup position, the other end of said gripper arm forming one portion of a gripper jaw suitable for gripping inserts; a shaft rotatably mounted in said gripper arm adjacent to said end forming said gripper jaw; a gripping jaw affixed to said shaft so as to form the other portion of said gripper jaw, the rotation of said gripping jaw with respect to said gripper arm forming a separation therebetween suitable for gripping inserts; a movable indicator element pivotally mounted on said shaft so as to be movable between two extreme positions, one of said extreme positions indicating that the size of said separation is below a predetermined size and the other of said extreme positions indicating that the size of said separation is beyond a predetermined size; a linking lever fixedly mounted on said shaft so as to coact with and control the movement of said indicator element between said two extreme positions as the separation between the portions of said gripper jaw changes; and, an electronic detection means for detecting and indicating the position of said movable element, said electronic detection means including a detecting element mounted on said gripper arm so as to be impinged upon by said movable indicator element, said movable indicator element impinging on said detecting element only when said movable indicator element is in one of said two extreme positions, said impingement causing said electronic detection means to indicate that no inserts or an erroneous number of inserts have been gripped.