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. 14, 1993
Filed:
Mar. 04, 1992
Applicant:
Inventors:
Ralph H Carmen, Lebanon, NJ (US);
James M Rodgers, Harrison, AR (US);
Assignee:
Duncan Industries Parking Control Systems Corp., Harrison, AR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G07D / ;
U.S. Cl.
CPC ...
194319 ;
Abstract
An apparatus for sensing coins is disclosed which is capable of distinguishing between valid and non-valid coins as well as between the different denominations of coins. The apparatus is useful for application in coin-operated parking meters as well as other coin-operated machines. The apparatus makes use of a twin-coil sensor which enables it to distinguish between small coins with high metal content and large coins with low metal content.