A human-machine interface involves plural spatially-coherent visual presentation surfaces at least some of which are movable by a person. The adapter device detects that the transceiver module has connected to the adapter device. and high strength and good oxidation resistance at 500\xb0 C. The receptacle is capable of holding a portable electronic device. A retainer ring is mounted in an associated groove in the base over the heads of the screws to prevent unintentional unfastening of the screws from the die member. The electric power supply means are inoperational when the latching means are not in the first operating position, the actuating coil of the electromagnetic actuator not being able to be supplied.