Abstract: The invention relates to an operating unit of a proximity transponder system. The unit has a housing of which the walls are formed predominantly of a metallic material, a space being defined in the walls in the region where the induction coil of the unit is located. This space is configured to permit magnetic flux lines to pass through the walls of the housing via the said space, thereby to permit inductive coupling with the induction coil of another operating unit. By forming the housing of predominantly a metallic material, possible tampering with the unit is greatly inhibited.

Abstract: A remote control banking system comprises an automatic teller machine (ATM) and a remote control operating device. The ATM includes a processor, a signal receiver that is linked to the processor and an electro-magnetic coil. The device is in the form of a portable, hand-held unit and includes a keypad for entering a confidential code associated with a person wishing to perform a transaction via the ATM. The device includes a microprocessor incorporating a data base for storing a preset code containing predetermined information on the banking account of the person. The device includes a signal generator for generating radio frequency signals from the confidential and preset codes, and transmitters and for transmitting the signals to the signal receiver. The device includes an electro-magnetic coil which is energised to provide power for the device when in proximity with the electro-magnetic coil of the ATM.