Perforated record sensing device

Claim 1

IN A DEVICE FOR SENSING A PERFORATED RECORD STRIP HAVING A LINEAR ROW OF LIKE PERFORATIONS INCLUDING EQUIDISTANTLY SPACED PERFORATIONS AND PERFORATIONS SPACED AT MULTIPLES OF THE DISTANCE OF THE SPACING OF SAID EQUIDISTANTLY SPACED PERFORATIONS; A ROTATABLE DRUM HAVING AN ANNULUS OF LIKE RECESSES EQUIDISTANTLY SPACED CIRCUMFERENTIALLY AROUND ITS PERIPHERY, THE CENTERS OF SAID RECESSES BEING SPACED A DISTANCE SUBSTANTIALLY EQUAL TO THE SPACING OF THE CENTERS OF SAID EQUIDISTANTLY SPACED PERFORATIONS, MEANS FOR TRANSPORTING SAID STRIP LINEARLY UPON ROTATION OF SAID DRUM TO BEING SAID PERFORATIONS SUCCESSIVELY INTO REGISTRATION WITH SAID RECESSES, A WHEEL HAVING TEETH ADAPTED FOR MESHING ENGAGEMENT WITH SAID ANNULUS OF RECESSES, SAID TEETH BEING SO SPACED AS TO BE ENGAGED SUCCESSIVELY BY THE SUCCESSIVE RECESSES OF SAID DRUM UPON ROTATION OF SAID DRUM IN EITHER DIRECTION THEREBY ROTATING SAID WHEEL AND SAID RECESSES HAVING A DEPTH TO PERMIT SAID DRIVING ENGAGEMENT WITH SAID TEETH WITHOUT THE BOTTOMS OF SAID RECESSES ENGAGING SAID TEETH, MEANS ADJUSTABLY MOUNTING SAID WHEEL FOR MOVEMENT AWAY FROM AND TOWARD ENGAGEMENT OF ITS TEETH WITH SAID ANNULUS OF RECESSES, MEANS FOR YIELDABLY URGING SAID WHEEL TOWARD SAID DRUM FOR PASSAGE OF ITS TEETH THROUGH SAID PERFORATIONS INTO MESHING ENGAGEMENT WITH SAID ANNULUS OF RECESSES, A PAIR OF ELECTRICAL CONTACTS, AND MEANS SIMULTANEOUSLY OPERABLE WITH MOVEMENT OF ONE OF SAID TEETH TO ENGAGEMENT WITH ONE OF SAID RECESSES TO CLOSE SAID CONTACTS.