Magnetizer having a main electromagnet and leakage flux reducing

Details Magnetizer having a main electromagnet and leakage flux reducing Magnetizer having a main electromagnet and leakage flux reducing

1987-02-25

1989-05-30

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetic recording medium on magnetized object records...

324228, 335284, 335304, G01N 2785, H01F 1300

Patent

active

048354708

ABSTRACT:
A magnetizer for magnetographic inspection of articles comprises a main electromagnet, an auxiliary electromagnet, and a power supply unit for the windings of the electromagnets. The auxiliary electromagnet is offset with respect to the central zone of the magnetic field established by the main electromagnet, in a direction perpendicular to that of the magnetic lines of force of the main electromagnet, and is mounted for changing its position.

REFERENCES:
patent: 2842737 (1958-07-01), Zoltan
patent: 2892150 (1959-06-01), Nettles et al.
patent: 3271664 (1966-09-01), Mountz et al.
patent: 3430133 (1969-02-01), Greiner et al.
patent: 4058762 (1977-11-01), Holt et al.
patent: 4477776 (1984-10-01), Spierer
patent: 4490675 (1984-12-01), Knuettel et al.
patent: 4594549 (1986-06-01), Smith et al.

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