Magnetic detector

Electricity: measuring and testing – Magnetic – Displacement

Reexamination Certificate

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Details

C324S252000

Reexamination Certificate

active

07397236

ABSTRACT:
The invention provides a magnetic detector that exerts no influence on detection accuracy of a magnetic movable body, being a detected body, even if relative positions of magnetic resistance elements and a magnet are out of alignment due to variation occurred in manufacturing process. A magnetic detector includes: a magnetic field detection part constructed of at least two magnetic resistance elements; a magnet for applying a magnetic field to the magnetic resistance elements; a magnetic movable body for changing the magnetic field that is generated by the magnet; and a processing circuit part for outputting a signal based on the change in resistance values of the magnetic resistance elements due to the change in the magnetic field; and in which a shape of the magnetic resistance elements is symmetric with respect to a point.

REFERENCES:
patent: 4835509 (1989-05-01), Yoshino et al.
patent: 5057678 (1991-10-01), Ichikawa
patent: 6111403 (2000-08-01), Yokotani et al.
patent: 6177793 (2001-01-01), Shinjo et al.
patent: 6366079 (2002-04-01), Uenoyama
patent: 6577122 (2003-06-01), Yokotani et al.
patent: 6630821 (2003-10-01), Shinjo et al.
patent: 6819101 (2004-11-01), Yokotani et al.
patent: 101 27 754 (2003-01-01), None
patent: 103 33 249 (2004-03-01), None
patent: 2004-69546 (2004-03-01), None

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