7 the computer 31 is connected via a third line 39 with a remote programming station not shown in more detail for occasional or continuous input of the current rate of exchange further a coin tester 40 is arranged downstream of the coin insertion slot this coin tester 40 is designed to accept coins in the currency of the present country and is directly coupled via a fourth line 41 so as to bypass the computer with the drive 37 for disengaging the lock 38 of the blocking arms 24 which are suspended so as to be rotatable about a vertical axis and which control the release opening of the cart store 1 this coupling being effected in such a way that the coin operated machine and luggage pushcart release can also be actuated by inserting coins in the currency of the present country a video monitor 42 is arranged at the coin deposit acceptance devices 8 in each instance and displays operating instructions and if required the successive steps such as u201c insert deposit u201d u201c remove change u201d or u201c remove cart u201d and the like in the schematic view of the interaction between the stationary transmitter receiver system and the mobile transmitter receiver system shown in fig5 a stationary transmitter receiver unit 11 is outfitted with a prompting transmitter 43 and an integrated transmitter antenna 44 associated with the latter a receiver antenna 45 a receiver 46 connected downstream of the latter a microprocessor 47 a power supply 48 and an interface 49 for the host computer 50 in addition to a battery for safeguarding the power.