SHEET DISCRIMINATING DEVICE

摘要

A device for discriminating valuable papers comprises a battery 1; a self-holding circuit 5 connected between battery 1 and drive controller 2 and capable of being switched between an active condition for supplying electric power to validation sensor 4 and drive controller 2 from battery 1 and an inactive condition for interrupting the power supply; a trigger element 6 for switching self-holding circuit 5 in the inactive condition to the active condition; and a shutoff circuit 7 having a control terminal connected to drive controller 2 for switching self-holding circuit 5 in the active condition to the inactive condition. Inactive condition of self-holding circuit 5 during the disuse period, saves electric power to extend service life and exchange cycle of battery 1.