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:
Dec. 30, 2003
Filed:
Aug. 30, 2001
Hiroshi Ohtomo, Iwatsuki, JP;
Asahi Seiko Co., Ltd., Tokyo, JP;
Abstract
A coin sensor is provided for more accurately assessing the authenticity of a coin passing through a vertical channel where the channel is sized to accommodate different diameter coins. In the present invention, magnetic coils are deployed on the side of the channel to measure magnetic flux, which is converted to digital signals and compared to stored values to assess the diameter, thickness, and material of the coin. To reduce the tolerances associated with the varying path of the coin, the sensors have been provided with cores having generally straight and parallel upper and lower surfaces aligned perpendicular to the path of the coin to remove the variances in the overlapping coin area as the coin.