Selector switch for register control

Claim 1

IN A REGISTER CONTROL SYSTEM FOR ADVANCING MATERIAL OF INDETERMINATE LENGTH TO MEANS TO PERFORM WORK ON THE MATERIAL AT A PREDETERMINED POSITION WITH RESPECT TO REGISTRATION MARKS THEREON, A SWITCH RESPONSIVE TO THE POSITION OF THE WORK PERFORMING MEANS COMPRISING A MOVABLE MEMBER COUPLED TO SAID WORK PERFORMING MEANS, SAID MOVABLE MEMBER HAVING A REFERENCE MARK TO INDICATE THE POINT AT WHICH SAID WORK PERFORMING MEANS ENGAGES SAID MATERIAL, FIRST AND SECOND SWITCHING MEANS SYMMETRICALLY SPACED ON SAID MOVABLE MEMBER ABOUT SAID REFERENCE MARK, AND FIRST AND SECOND SIGNAL PRODUCING MEANS POSITIONED ADJACENT SAID MOVABLE MEMBER SO THAT A FIRST SIGNAL IS PRODUCED WHEN SAID FIRST SWITCHING MEANS PERMITS SIGNAL PASSAGE FROM SAID FIRST SIGNAL PRODUCING MEANS AND A SECOND SIGNAL IS PRODUCED WHEN SAID SECOND SWITCHING MEANS PERMITS SIGNAL PASSAGE FROM SAID SECOND SIGNAL PRODUCING MEANS DURING EACH COMPLETE MOVEMENT OF SAID MOVABLE MEMBER.