Coin discrimination sensor and coin handling system
US5630494A · kind A · utility
58Cited by
48References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1995 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | Mar 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D5/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A coin discrimination sensor and coin handling system for discriminating among desired and undesired coins, comprised of an excitation coil for producing an alternating magnetic field. These alternating magnetic fields couple to the desired and undesired coins to induce eddy-currents. The sensor also is comprised of a detection coil for detecting eddy-currents from desired and undesired coins. The detection coil produces a differential voltage corresponding to the composition of the desired and undesired coins being sensed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.