Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
An interface for receiving two-terminal thin round electronic token data modules and establishing a data interface thereto, comprising: a physical positioning device, dimensioned to receive electronic tokens in an orientation which is well-defined but which does not conclusively determine which face of the token is facing in which of two directions; a grounded contact positioned to make contact to the edge of a token contacted by said physical positioning device; first and second data contacts, positioned in said slot to make contact to the opposite faces of a token contacted by said physical positioning device; first and second open-collector interface circuits, respectively connected to said first and second data contacts, said interface circuits each including a pull-up element; circuitry connected to detect when one of said data contacts is pulled to ground, and thereby to detect that a token has been contacted by said physical positioning device and that the other of said data contacts is in contact with the data line of the token.
Claim 2
Dependent Claim
165 words
An interface for receiving two-terminal thin round electronic token data modules and establishing a data interface thereto, comprising: a physical positioning device, dimensioned to receive electronic tokens in an orientation which is well-defined but which does not conclusively determine which face of the token is facing in which of two directions; a grounded contact positioned to make contact to the edge of a token contacted by said physical positioning device; first and second data contacts, positioned in said slot to make contact to the opposite faces of a token contacted by said physical positioning device; first and second open-collector interface circuits, respectively connected to said first and second data contacts, said interface circuits each including a pull-up element; circuitry connected to detect when one of said data contacts is pulled to ground, and thereby to detect that a token has been contacted by said physical positioning device and that the other of said data contacts is in contact with the data line of the token.
Claim 3
Dependent Claim
139 words
An interface for receiving two-terminal thin round electronic token data modules and establishing a data interface thereto, comprising: a slot, dimensioned to receive electronic tokens; a grounded contact positioned to make contact to the edge of a token which may be inserted into said slot; first and second data contacts, positioned in said slot to make contact to the opposite faces of a token which may be inserted into said slot; first and second open-collector interface circuits, respectively connected to said first and second data contacts, said interface circuits each including a pull-up element; circuitry connected to detect when one of said data contacts is pulled to ground, and thereby to detect that a token has been inserted in said slot and that the other of said data contacts is in contact with the data line of the token.
Claim 4
Dependent Claim
139 words
An interface for receiving two-terminal thin round electronic token data modules and establishing a data interface thereto, comprising: a slot, dimensioned to receive electronic tokens; a grounded contact positioned to make contact to the edge of a token which may be inserted into said slot; first and second data contacts, positioned in said slot to make contact to the opposite faces of a token which may be inserted into said slot; first and second open-collector interface circuits, respectively connected to said first and second data contacts, said interface circuits each including a pull-up element; circuitry connected to detect when one of said data contacts is pulled to ground, and thereby to detect that a token has been inserted in said slot and that the other of said data contacts is in contact with the data line of the token.