Abstract: In the present plating apparatus the bath contains an electrolyte solution having a uniform ion concentration. A common electrode, a plating electrode and a standard electrode are arranged in the bath. A direct current source is connected between the common electrode and the plating electrode. A further, constant, direct current source is connected between the common electrode and the standard electrode. A potentiometer device is arranged for detecting resistance changes between these electrodes due to variations in the ion concentration and in the mobility of the electrolyte solution between the electrodes. A control is responsive to the potentiometer device for regulating the plating current supplied by the direct current source as a function of the potential difference detected by the potentiometer device, whereby a constant plating current density is achieved.

Abstract: A cash dispensing system capable of automatically counting and dispensing cash of the amount requested by a customer to be withdrawn is disclosed. Where an error occurs in a cash dispensing process, cash dispensing is stopped and the cash dispensing operation is repeated from the beginning. Where the error occurs a predetermined number of times, the cash dispensing operation is entirely stopped.