Magnetic detection apparatus for currency changing machine

Claim 1

IN A CURRENCY TESTER: MEANS FOR RELEASABLY HOLDING CURRENCY TO BE TESTED IN A STATIONARY POSITION; A MAGNETIC SENSING DEVICE FOR PRODUCING AN ELECTRICAL SIGNAL UPON RELATIVE MOVEMENT OF THE DEVICE AND THE CURRENCY; STRUCTURE COUPLED WITH THE DEVICE FOR MOVING THE LATTER RELATIVE TO SAID HOLDING MEANS TO SCAN CURRENCY HELD THEREBY, WHEREBY THE PRESENCE OF MAGNETIC INK IN THE CURRENCY UNDER TEST CAUSES SAID SIGNAL TO BE PRODUCED BY THE DEVICE; MEANS RESPONSIVE TO SAID ELECTRICAL SIGNAL FOR REMOVING THE TESTED CURRENCY FROM THE HOLDING MEANS, AND INCLUDING A NORMALLY CLOSED GATE, MEANS COUPLED WITH THE GATE FOR OPENING THE LATTER FOR A PREDETERMINED PERIOD OF TIME, AND STRUCTURE FOR DIRECTING THE TESTED CURRENCY THROUGH THE GATE WHILE THE LATTER IS OPEN; AND CONTROL MEANS COUPLED WITH SAID GATE AND ADAPTED TO BE OPERABLY COUPLED WITH AUXILIARY APPARATUS FOR PREVENTING OPERATION OF THE LATTER UNLESS THE GATE IS CLOSED, WHEREBY TO ASSURE THAT THE AUXILIARY APPARATUS WILL REMAIN INOPERATIVE IF THE TESTED CURRENCY BECOMES LODGED IN THE GATE AND PREVENTS CLOSURE THEREOF.