Detectors for use with sheet feeds

Claim 1

IN A SHEET FEEDING APPARATUS FOR FEEDING A SERIES OF SHEETS, MEANS FOR FEEDING SHEETS CONSECUTIVELY TO A DETECTING POSITION, MEANS FOR REMOVING STACKED SHEETS FROM SAID DETECTING POSITION WHEN MORE THAN ONE SHEET IS SIMULTANEOUSLY FED TO SAID POSITION, SAID MEANS FOR REMOVING STACKED SHEETS COMPRISING A PAIR OF FEED ROLLERS POSITIONED BEYOND SAID DETECTING POSITION SUCH THAT A PART OF EACH SHEET WHEN LOCATED AT THE DETECTING POSITION LIES BETWEEN SAID ROLLERS, SAID FEED ROLLERS BEING SPACED APART MORE THAN A SINGLE SHEET THICKNESS BUT LESS THAN THE THICKNESS OF TWO SHEET SUCH THAT SAID ROLLERS WILL NOT ENGAGE A SINGLE SHEET AND WILL ENGAGE A STACK OF TWO OR MORE SHEETS TO REMOVE THEM FROM SAID DETECTING POSITION, A FEELER FOR DETECTING THE PRESENCE OF A SHEET AT SAID DETECTING POSITION, MEANS FOR MOVING SAID FEELER IN A PATH THROUGH SAID DETECTING POSITION AND BACK AGAIN IN TIMED RELATIONSHIP WITH THE SHEET FEEDING MEANS, SWITCH MEANS FOR STOPPING SAID SHEET FEEDING APPARATUS, AND MEANS COUPLED TO SAID FEELER TO OPERATE SAID SWITCH UPON SAID FEELER MOVING THROUGH SAID DETECTING POSITION WHEREBY DURING OPERATION OF SAID APPARATUS SAID FEELER WILL ENGAGE EACH SHEET AT SAID DETECTING POSITION, THE FEELER STOPPING SHORT ITS MOVEMENT THROUGH SAID DETECTING POSITION AND IN THE EVENT NO SHEET IS PRESENT AT SAID DETECTING POSITION SAID FEELER WILL MOVE THROUGH SAID DETECTING POSITION TO OPERATE SAID SWITCH.