Amorphous antipilferage marker

Details Amorphous antipilferage marker Amorphous antipilferage marker

1985-06-03

1987-05-26

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

335296, 340551, G08B 1326

Patent

active

RE0324272

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 that retains its signal identity after being flexed or bent.

REFERENCES:
patent: 3820104 (1974-06-01), Fearon
patent: 3856513 (1974-12-01), Chen et al.
patent: 4036638 (1977-07-01), Ray et al.
patent: 4074249 (1978-02-01), Minasy
patent: 4075618 (1978-02-01), Montean
O'Handley, R. C., et al., "Ferromagnetic Properties of Some New Metallic Glasses," Applied Physics Letters, XXIX, 6, pp. 230-232.
Hilzinger, H. R. et al, "Amorphous Ferromagnetic Materials-Magnetic Fundamentals, Properties, & Applications," Journal of Magnetism and Magnetic Materials, IX (1978), pp. 191-199.
Fahlenbrach, "Techn Mitt. Krupp-Werksber.," 30, 149 (1972).

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