Coin discrimination sensor and coin handling system
US5743373A · kind A · utility
56Cited by
50References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1996 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Nov 7, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D5/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A coin discrimination sensor for discriminating among desired and undesired coins, comprised of an excitation coil for producing an alternating magnetic field. These alternating magnetic fields couple to said 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.