Coin validator
US5609234A · kind A · utility
5Cited by
2References
13Claims
0Family size
Inventors
Key dates
| Filing date | Nov 4, 1994 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Nov 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D5/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A coin validator has a sensor circuit including two sensor coils each of small diameter, the coils being positioned such that they are passed in succession by a coin moving through a test section of the validator. The sensor circuit derives a signal representing the difference between the coil outputs so that bimetallic coins having a different outer ring material from the core material are easily detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.