Method and apparatus utilizing magnetic field sensing for detect

Details Method and apparatus utilizing magnetic field sensing for detect Method and apparatus utilizing magnetic field sensing for detect

1983-05-05

1985-09-17

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324117H, G01R 3300, G01R 3108

Patent

active

045423334

ABSTRACT:
A method and apparatus for detecting discontinuities in electric conductor heating lines in automobile heated back lights is disclosed. The apparatus includes a "Hall effect" probe, a microprocessor, a display, a stepping motor drive, an optical scanner and associated circuitry. The method includes the steps of energizing the heating grid and moving a Hall effect probe in the vicinity of each conductor line. Any heater line having discontinuity will lack a detectable magnetic field.

REFERENCES:
patent: 3590371 (1971-06-01), Shaw
patent: 4362991 (1982-12-01), Carbine
patent: 4395677 (1983-07-01), Petersdorf

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