Memory card read/write device provided with an anti-fraud device

Details Memory card read/write device provided with an anti-fraud device Memory card read/write device provided with an anti-fraud device

1988-12-23

1991-03-12

Pitts, Harold I.

Registers

Records

Conductive

235488, G06K 1906

Patent

active

049996010

ABSTRACT:
In order to avoid attempted fraud, the reader is provided with a detector for detecting a conductor wire disposed fraudulently in the insertion passage. The detector comprises a conducting plate (50) disposed across the passage. The plate (50) is fed with A.C. (62). When a fraudulent conductor wire (46) is connected to one of the contact blades (26) of the read head (28), the detector circuit is looped by capacitive coupling between the wire (46) and the plate (50).

REFERENCES:
patent: 4105156 (1978-08-08), Dethloff
patent: 4707594 (1987-11-01), Roty

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