Aliki Collins - Newton MA Ronald Martis - East Hanover NJ Victor Ambasz - Bedminster NJ
Assignee:
AlliedSignal Inc. - Morris Township NJ
International Classification:
H01F 153
US Classification:
148304
Abstract:
A magnetic theft detection system includes a glassy metal alloy strip having a value of magnetostriction near zero. The strip has been annealed to produce a step change in the magnetization versus applied field behavior (B-H loop) thereof, and has a composition consisting essentially of the formula. (Co Fe). sub. 100-x (Si B). sub. x where 20. ltoreq. x. ltoreq. 23 and 15. 4. ltoreq. Co/Fe. ltoreq. 15. 9 and 7. 5. ltoreq. B/Si. ltoreq. 9. Annealing of the metal alloy strip in an oxidizing atmosphere causes the formation of a surface oxide followed by a distinctive crystalline Co-layer with thickness in the range of 1 to 2. mu. m. The thickness of the crystalline Co-layer determines the value of the threshold magnetic field and is controlled by the annealing conditions and the as cast surface chemistry and structure.
Aliki Collins - Newton MA John Silgailis - Cedar Grove NJ Peter Farley - Roselle Park NJ Ryusuke Hasegawa - Morristown NJ
Assignee:
AlliedSignal Inc. - Morristown NJ
International Classification:
H01F 1706 H01F 2728
US Classification:
336178
Abstract:
An electrical choke comprises a magnetic amorphous metal core having, in combination, a distributed gap and a discrete gap. The amorphous metal is an iron based, rapidly solidified alloy. The distributed gap configuration is achieved by subjecting the magnetic core to a heat treatment, causing partial crystallization of the amorphous alloy. Such partial volume crystallization reduces the permeability of the magnetic core from several thousands to a value ranging from 200 to 800. The discrete gap is introduced by cutting the core and inserting a spacer. Depending on the width of the gap and the value of the annealed permeability, effective permeabilities in the range of 200 to 40 can be achieved. Advantageously, the reduced permeability magnetic core maintains its initial permeability under DC bias field excitation and exhibits low core loss, making it especially suited for use in power factor correction applications.
Vms-Mit 2002 - Sep 2013
Mentor
Mit Club of Boston 2004 - 2005
President
Akc Patents 2004 - 2005
Owner
Ipcapital Group 2000 - 2001
Director Ip Valuation
Fish & Richardson P.c. 1997 - 1999
Technology Specialist
Education:
Massachusetts Institute of Technology Sep 1983 - 1987
Doctorates, Doctor of Philosophy, Materials Science, Physics
Technische Universität Berlin 1976 - 1982
Skills:
Patents Invention Medical Devices Start Ups Intellectual Property Prosecution Entrepreneurship Licensing R&D Patent Prosecution Technology Transfer Patent Litigation Venture Capital Trademarks Biotechnology Lifesciences Corporate Development Innovation Management Semiconductors Patent Law Strategy