Amorphous antipilferage marker

Details Amorphous antipilferage marker Amorphous antipilferage marker

1982-10-27

1985-01-22

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340551, G08B 1326

Patent

active

044954875

ABSTRACT:
A magnetic theft detection system marker is adapted to generate magnetic fields at frequencies that (1) are harmonically related to an incident magnetic field applied within an interrogation zone and (2) have selected tones that provide the marker with signal identity. The marker is an elongated, ductile strip of amorphous ferromagnetic material having a composition defined by the formula Fe.sub.a Cr.sub.b C.sub.c P.sub.d Mo.sub.e Cu.sub.f B.sub.g Si.sub.h where "a" ranges from about 63-81 atom %, "b" ranges from about 0-10 atom %, "c" ranges from about 11-16 atom %, "d" ranges from about 4-10 atom %, "e" ranges from about 0-2 atom %, "f" ranges from about 0-1 atom %, "g" ranges from about 0-4 atom % and "i" ranges from about 0-2 atom %, with the proviso that the sum (c+d+g+h) ranges from 19-24 atom % and the fraction [c/(c+d+g+h)] is less than about 0.84.

REFERENCES:
patent: 3820104 (1974-06-01), Fearon
patent: 3856513 (1974-12-01), Chen et al.
patent: 4074249 (1978-02-01), Minasy
patent: 4075618 (1978-02-01), Montean
patent: 4298862 (1981-11-01), Gregor et al.

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