Abstract: An embodiment of a method of communicating between a surface processing unit and an energy industry tool includes: receiving a power signal from a power source at an integrated interface device of a communication and processing system, the communication and processing system located between a surface processing unit and an energy industry tool, the interface device including a processor and a variable output power supply; receiving a communication at the processor from a surface processing unit; transmitting a control signal from the processor to the variable output power supply, the control signal including a series of pulses having a duty cycle that is varied to cause the power supply to generate a modulated direct current (DC) output signal having at least one of a frequency and an amplitude that is modulated according to a communication protocol to represent the communication; and transmitting the modulated output signal to a tool.

Abstract: An embodiment of a method of communicating between a surface processing unit and an energy industry tool includes: receiving a power signal from a power source at an integrated interface device of a communication and processing system, the communication and processing system located between a surface processing unit and an energy industry tool, the interface device including a processor and a variable output power supply; receiving a communication at the processor from a surface processing unit; transmitting a control signal from the processor to the variable output power supply, the control signal including a series of pulses having a duty cycle that is varied to cause the power supply to generate a modulated direct current (DC) output signal having at least one of a frequency and an amplitude that is modulated according to a communication protocol to represent the communication; and transmitting the modulated output signal to a tool.

Abstract: A clip (10) for holding banknotes has a first clasp portion (14) and a second clasp portion (12) for holding banknotes therebetween. The first clasp portion (14) has a first magnetic portion (22) including magnetic material (30,32) and the second clasp portion has a second magnetic portion including magnetic material (18,19). The first magnetic portion (22) is moveable relative to the second magnetic portion between: a closed position whereby the interaction of the magnetic material of the first magnetic portion (30,32) and second magnetic portion (18,19) is such that there is a net force of attraction to hold the first and second clasp portions (14,12) together; and an open position whereby the first and second clasp portions (14,12) are released apart.