Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1983-02-04
1985-11-12
Myracle, Jerry W.
Communications: electrical
Condition responsive indicating system
Specific condition
235493, G08B 1326
Patent
active
045531366
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 value of magnetostriction near zero that retains its signal identity under stress.
REFERENCES:
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patent: 4075618 (1978-02-01), Montean
patent: 4126287 (1978-11-01), Mendelsohn et al.
patent: 4298862 (1981-11-01), Gregor et al.
Egami, T. et al., Amorphous Alloys as Soft Magnetic Materials, _Publication of Univ. of Pennsylvania, 1975, 17 pages.
Luborsky, F. E. et al., Magnetic Annealing of Amorphous Alloys, _IEEE Transactions, vol. MAG-11, No. 6, Nov. 1975, pp. 1644-1649.
Sellers, G. J., Metglas Alloys: An Answer . . . Shielding, IEEE publication, 1977, 4 pages.
Anderson, III Philip M.
Hasegawa Ryusuke
VonHoene Robert M.
Allied Corporation
Buff Ernest D.
Fuchs Gerhard H,.
Myracle Jerry W.
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