METAL COINS WHICH CAN BE DISTINGUISHED AND SEPARATED FROM ONE ANOTHER BY PHYSICAL METHODS RESPONDING TO MAGNETIC PROPERTIES

In order to make metal disks, especially coins, distinguishable and separable from one another and from disks consisting of other materials on the basis of their magnetic properties, they are made according to the invention of one or more nonmagnetic layers, which consist preferably of a copper-nick...

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Bibliographic Details
Main Authors HUGO ZOEBE, HANS CONRADT
Format Patent
LanguageEnglish
Published 18.01.1972
Subjects
ALLOYS
BRACELETS
CHEMISTRY
COINS
FERROUS OR NON-FERROUS ALLOYS
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
HABERDASHERY
HUMAN NECESSITIES
JEWELLERY
METALLURGY
OTHER PERSONAL ADORNMENTS
TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:In order to make metal disks, especially coins, distinguishable and separable from one another and from disks consisting of other materials on the basis of their magnetic properties, they are made according to the invention of one or more nonmagnetic layers, which consist preferably of a copper-nickel alloy containing 5 to 60 percent nickel, and of one or more layers of magnetic metal, especially nickel, in special, very specific thickness ratios between the magnetic layers and the overall thickness of the metal disks in question.
Bibliography:Application Number: USD3634890