Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-11-14
1998-09-15
Biegel, Ronald L.
Communications: electrical
Condition responsive indicating system
Specific condition
340571, G08B 1324
Patent
active
058085491
ABSTRACT:
A method of manufacturing a magnetic sensor element, and a security system using this element. The method involves preparing an amorphous magnetic n=0.1.about.0.3, and heat treating the magnetic alloy in the atmosphere for more than one minute at 200.degree. C..about.460.degree. C. to produce the magnetic sensor element where the heat treatment is carried out under substantially zero external magnetic field. The manufacturing method results in a magnetic sensor element which produces a sensor signal having two major pulses and two minor pulses during one period of an externally applied alternating magnetic field, the two major pulses being easily detected by a security system.
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Jang Hyo Sun
Shin Kyung Ho
Yoo Heung Yeol
Biegel Ronald L.
Korea Institute of Science and Technology
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