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: 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.

Abstract: An automated pipe handling system is provided to increase safety and to minimize the number of workmen required in the coupling and uncoupling of pipe stands. The system includes a programmable controller for monitoring and/or controlling devices which remove and add pipe stands to a drill column. A number of transducers are operatively connected to the controlled devices for communication with the programmable controller for use in verifying that the controlled devices have properly performed their programmed tasks. The controlled devices include upper and lower arm assemblies for use in engaging and moving the uncoupled pipe stands to a storage position. The controlled devices further include a finger board assembly and a set-back assembly. The finger board assembly moves and retains the upper portions of the pipe stands while a drill rig floor of a derrick supports their lower portions.