Magnetic material amount detecting apparatus

Details Magnetic material amount detecting apparatus Magnetic material amount detecting apparatus

2007-06-05

2007-06-05

Aurora, Reena (Department: 2862)

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

Reexamination Certificate

active

11014173

ABSTRACT:
A magnetic material amount detecting apparatus includes primary winding and secondary winding which are wound on a core having a reading section to which a to-be-detected medium is set close. A current is supplied to the primary winding and an output signal from the primary winding is adjusted by an A.C. current detecting section. Then, a difference between the output signal output from the primary winding and adjusted by the A.C. current detecting section and an output signal from the secondary winding is output as a signal indicating the amount of magnetic material which is present near the reading section.

REFERENCES:
patent: 2875429 (1959-02-01), Quade
patent: 4622542 (1986-11-01), Weaver
patent: 5278500 (1994-01-01), Seitz
patent: 6289141 (2001-09-01), Roseman
patent: 7012424 (2006-03-01), Obama et al.
patent: 0611164 (1994-08-01), None
patent: 62-36540 (1987-02-01), None
European Search Report dated Apr. 18, 2005 for Appln. No. EP 04 02 9591.

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