Coin discriminator

US5833042A · kind A · utility

Assignee

• Microsystem Controls Pty Ltd · AU

Inventors

• Alexander Baitch · Parramatta, AU
• Lawrence Peter Phillips · Hornsby, AU
• Norman Raymond Malzard · Parramatta, AU
• Phillip Andrew Wolstoncroft · Hill Top, AU
• Nikola Korecki · Sydney, AU

Key dates

• Filing date: Jun 17, 1996
• Grant date: Nov 10, 1998
• Expiry date: Jun 17, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G07D5/00
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method of categorizing coins/tokens by energizing detect coils with a single pulse detecting the back EMF curve of the decaying pulse information, analyzing the unmodified back EMF curve to extract therefrom a number of variables and processing those variables to provide values proportional to the variables, and comparing the values of the coin/token to at least one of a number of reference values to determine into which of a number of predetermined categories the coin/token falls.