Coin inspecting apparatus

Details Coin inspecting apparatus Coin inspecting apparatus

1976-12-02

1978-11-07

Rolla, Joseph J.

Check-actuated control mechanisms

Including noncontacting, relatively movable parts connected...

194100A, G07F 302

Patent

active

041241118

ABSTRACT:
In a coin inspecting apparatus wherein two secondary coils of a differential transformer are disposed along a coin passage and connected in series opposition, the secondary coils are disposed with a spacing smaller than the diameter of the coin and the level of the output of the secondary coils is detected to determine the diameter of the coin. In a modification two sets of the secondary coils are provided to inspect not only the diameter but also the material and the surface pattern of the coin.

REFERENCES:
patent: 3682286 (1972-08-01), Pramm
patent: 3901368 (1975-08-01), Klinger
patent: 3918564 (1975-11-01), Heiman et al.
patent: 3962627 (1976-06-01), Ptacek et al.

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