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:
May. 17, 2005
Filed:
Jan. 24, 2003
Tien-yuan Chien, Taipei, TW;
Chun-yi LU, Taipei Hsien, TW;
Cheng-yi Lin, Taipei, TW;
International Currency Technologies Corporation, Taipei, TW;
Abstract
A coin detector installed in the track of a coin acceptor at a back side of a face panel is constructed to include a frequency oscillation circuit, the oscillation circuit assembly being formed of two printed circuit boards symmetrically disposed at two sides of the track of the coin acceptor each printed circuit board having a spiral coil and adapted to measure the inductance value of the coin passing through, a frequency switching circuit for setting reference values, and a CPU adapted to compare the inductance value of the coin detected by the oscillation circuit assembly to reference values obtained from the frequency switching circuit so as to determine the authenticity and value of the coin detected.