Mass transit inductive data communication system

A mass transit information communication system, comprising:

• first data accumulation means for storing first information pertinent to fares;
• first data transmitter means connected to said first data accumulation means for retrieving said first information pertinent to fares, for serially providing first transmitted data bits corresponding to said first information pertinent to fares, for encoding said first transmitted data bits into sequences of first signal transitions, and for providing a first current change in response to each said first signal transition;
• a first inductive transformer half connected to said first data transmitter means for providing a first flux change in response to each said first current change;
• a second inductive transformer half for providing a second current change in response to each said first flux change, said first inductive transformer half and said second inductive transformer half being disposed such that they may be placed into sufficient proximity that each said flux change may induce a corresponding second current change in said second inductive transformer half;
• first data receiver means connected to said second inductive transformer half for providing a second signal transition in response to each said second current change, for decoding sequences of second signal transitions into first received data bits reproducing said first information pertinent to fares;
• second data accumulation means connected to said first data receiver means for storing said reproduced first information pertinent to fares;
• second data transmitter means connected to said second data accumulation means for retrieving second information pertinent to fares, for serially providing second transmitted data bits corresponding to said second information pertinent to fares, for encoding said second transmitted data bits into sequences of third signal transitions, and for providing a third current change in response to each said third signal transition;
• a third inductive transformer half collocated with said second inductive transformer half and connected to said second data transmitter means for providing a second flux change in response to each said third current change;
• a fourth inductive transformer half collocated with said first inductive transformer half for providing a fourth current change in response to each said second flux change, said third inductive transformer half and said fourth inductive transformer half being disposed such that they may be placed into sufficient proximity that each said second flux change may induce a corresponding fourth current change in said fourth inductive transformer half;
• second data receiver means connected to said fourth inductive transformer half for providing a fourth signal transition in response to each said fourth current change, for decoding sequences of fourth signal transitions into received data bits, for providing reproduced second information pertinent to fares corresponding to said second received data bits, and for providing said reproduced second information to said first data accumulation means.