Identification card which is magnetically coded to prevent count

Details Identification card which is magnetically coded to prevent count Identification card which is magnetically coded to prevent count

1982-04-23

1984-06-19

Pitts, Harold I.

Registers

Records

Magnetic

235449, 235450, G06K 1906

Patent

active

044554842

ABSTRACT:
An identification card includes a plurality of magnetizable spots, each spot comprising two portions of opposite polarity spaced apart by a distance d.sub.1. Adjacent spots are spaced apart such that the distance d.sub.2 between a pole on one spot and an oppositely magnetized pole on an adjacent spot is less than the distance d.sub.1. The direction of magnetization of each spot is determined by a corresponding horseshoe core magnetizing assembly. With the magnetizing assembly moved proximate to the corresponding spot, a current is passed in either of two directions through a coil wound about the horseshoe core, which action magnetizes a corresponding spot in either of two directions. A plurality p of the q spots represent binary inputs which are to be read. The remaining (q-p) spots are dummy spots which are not to be read and can be magnetized in any direction in order to confound a counterfeiter.

REFERENCES:
patent: 4253017 (1981-09-01), Whitehead

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