Metal detector

Details Metal detector Metal detector

1991-02-04

1992-06-09

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340551, G08B 1314

Patent

active

051211050

ABSTRACT:
The invention relates to a metal detector for detecting metal objects in the material passing through the apparatus by means of a magnetic field induced by eddy currents. According to the invention, in the area between the transmitter coil system (1, 6) and the receiver coil system (3, 7) of the metal detector, there is installed at least one electrically insulated but electroconductive and/or magnetic element (2, 4, 5) in order to change the sensitivity distribution of the metal detector.

REFERENCES:
patent: 4012690 (1977-03-01), Heytow
patent: 4489313 (1984-12-01), Pfister
patent: 4866424 (1989-09-01), Parks

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