| 摘要 |
An arrangement for making payments by credit card, comprising a card reader (1), a keyboard (2) for entering the sum required and optionally a personal code, a printer (5) and a microprocessor (4) arranged to receive a signal from the card reader (1) relating to the account on which the credit card has been issued and optionally other information read from the credit card, and programmed to control the printer (5). The microprocessor (4) is intended to be coupled to the computer of a bank and/or the computer of a credit card financing company for debiting the account concerned. The invention is characterized in that a memory (17) is connected to the microprocessor (4); in that the microprocessor incorporates a random number generator; in that there is provided a further keyboard (19-21); in that the microprocessor (4) is programmed to store the signals received from the card reader (1) in the memory (17) pairwise with a number generated by the random number generator and in conjunction therewith to instruct the printer (5) to print out a record slip or receipt (15) on which, inter alia, the sum (16) and number (18) involved are printed. The microprocessor (4) is arranged to receive a signal from one of the further keyboards (19-21) corresponding to the aforementioned number, wherewith upon receipt of such a signal the microprocessor (4) is programmed to make a comparison between this signal and the combinations of the sums and numbers stored pairwise in the memory (17) and when the number is found present in the memory (17) to send a signal to the computer of the bank or credit card finance company instructing the computer to debit the account on which the sum is drawn. |
