A material for use in currency comprises an antimicrobial polymer material which can be used in the manufacture of banknotes having security features therein. The locking device assembly has a body with two chambers with two wedge members that each have base portions that are each positioned on substantially opposite sides of the body in the chambers. A burner flame detecting thermocouple TC and the gas shut off magnetic valve MV in the magnetic circuit are connected to each other by the unipolar overheat prevention terminal 7. The rotor tends to rotate relative to the stator to a rotational position that maximizes the inductance of an energized winding. A switching between the ports, corrects for single faults in a two-way redundant system without time-consuming reconfiguration of other end devices or the need for complex middleware in the end devices. The rod is operable to pass through a hole in the stub track channel, wherein a pin is removably coupled to the rod, therein selectively fixing the stop block to the track.