Coin testing apparatus

G - Physics – 07 – D

Patent

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Details

G07D 5/08 (2006.01) G07D 5/00 (2006.01) G07D 5/02 (2006.01)

Patent

CA 2064729

A coin testing apparatus is provided in which two oscillating magnetic fields interact with a coin and these interactions are monitored to test for the acceptability and/or the presence of a coin. The fields are associated with respective inductive coils which have a common core so arranged that not more than a minor proportion of the field of one coil interacts with the other coil. In a preferred embodiment one of the two coils encircles the other, which provides a very compact two-field coin sensing arrangement. In same embodiments one coil encircles the other but they have respective core elements.

Appareil pour vérifier les pièces de monnaie dans lequel deux champs magnétiques en oscillation interagissent avec une pièce, ces interactions étant contrôlées pour vérifier l'acceptabilité et/ou la présence d'une pièce. Les champs sont associés à des bobines inductives respectives qui ont un noyau commun disposé de sorte à ce que ni une plus grande ni une plus petite proportion du champ d'une bobine n'interagisse avec l'autre bobine. Dans une version préférée, une des deux bobines encercle l'autre, ce qui offre un dispositif de détection de pièce à deux champs très compact. Dans certaines versions, une bobine encercle l'autre mais elles ont des éléments de noyau respectifs.

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