Precision coin analyzer for numismatic application

Details Precision coin analyzer for numismatic application Precision coin analyzer for numismatic application

1978-09-08

1980-10-07

Tollberg, Stanley H.

Check-actuated control mechanisms

Including noncontacting, relatively movable parts connected...

G07F 302

Patent

active

042263239

ABSTRACT:
A device for testing coins or other metallic articles is disclosed whereby the article to be tested is introduced into the field generated by the inductor of an oscillator and the change in amplitude of the oscillations resulting from the interaction of the field generated and the article to be tested is measured.

REFERENCES:
patent: 2642974 (1953-06-01), Ogle
patent: 3401780 (1968-09-01), Davin
patent: 3956692 (1976-05-01), Weinberg
patent: 4105105 (1978-08-01), Braum

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