Article surveillance magnetic marker having an hysteresis loop w

Details Article surveillance magnetic marker having an hysteresis loop w Article surveillance magnetic marker having an hysteresis loop w

1996-11-08

1998-09-01

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340551, 164463, 164462, 164423, 420435, 148100, 148122, 148121, 148304, 148408, 148425, G08B 1314

Patent

active

058016309

ABSTRACT:
A harmonic-type EAS marker includes a wire segment formed of cobalt alloy. To form the wire segment, the cobalt alloy is cast as an amorphous wire, die-drawn to a smaller diameter, and then annealed with application of longitudinal tension. The annealed wire is cut to produce wire segments which have a magnetic hysteresis loop with a large Barkhausen discontinuity at a lower threshold level than has previously been achieved.

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