The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 1991
Filed:
Mar. 16, 1990
Riichiro Yamashita, Hyogo, JP;
Koichi Kanehara, Hyogo, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A coin discriminator discriminates a genuine coin from a counterfeit on the basis of a real component and an imaginary component of an impedance of the coin produced from a high frequency alternating current bridge circuit and decides an amount of the coin when the coin is genuine. An automatic balancing circuit having a sufficiently long time constant is employed to detect variations in the real component and the imaginary component of the impedance due to insertion of the coin. Whether the coin is genuine or counterfeit is discriminated on the basis of peak values of both variations and when the coin is genuine, an amount of the coin is decided.