Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1982-01-04
1985-05-21
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
194100A, 235449, 324235, G01R 3312, G01N 2772, G07D 700, G06K 708
Patent
active
045189196
ABSTRACT:
A paper note containing a magnetic strip is transported along a path and adjacent a magnetic detector. This magnetic detector comprises a magnet and a magnetic resistance element provided in the magnetic field generated by the magnet. When the magnetic strip passes through this magnetic field, the change in the field is detected by circuitry. This circuitry detects the change in resistance of the magnetic resistance element. By checking the change in resistance of the resistance element and comparing it with a predetermined value, the existance or non-existance of the magnetic strip can be determined.
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patent: 4107601 (1978-08-01), Barmeier et al.
patent: 4229696 (1980-10-01), Gustafson
patent: 4255708 (1981-03-01), Wilson
Strecker Gerard R.
Tokyo Shibaura Denki Kabushiki Kaisha
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