| Patent Number |
Title Of Patent |
Date Issued |
| 7552810 |
Sensor and method for discriminating coins using fast fourier transform |
June 30, 2009 |
| A coin discrimination sensor having an excitation coil and two detector coils arranged to detect eddy currents in a passing coin. The excitation coil is provided a composite waveform formed by adding a low frequency signal (30 KHz) with a high frequency signal (480 KHz). The two detector |
| 7256874 |
Multi-wavelength currency authentication system and method |
August 14, 2007 |
| A counterfeit determination is made with respect to currency bills by illuminating the currency bill with multiple wavelengths of light. Genuine currency bills include indicia printed with an ink that responds similarly to infra-red illumination at two different wavelengths. To ident |
| 7188720 |
Disc-type coin processing device having improved coin discrimination system |
March 13, 2007 |
| A coin processing system for processing a plurality of coins of mixed denominations comprises a rotatable disc for imparting motion to the plurality of coins, a sensor for differentiating between valid and invalid coins, a stationary sorting head, a diverter and a controller. The sta |
| 6988606 |
Coin processing machine and method for discriminating coins of varied composition, thickness, an |
January 24, 2006 |
| A coin discrimination sensor having an excitation coil and two detector coils arranged to detect eddy currents in a passing coin. The excitation coil is provided a composite waveform formed by adding a low frequency signal (30 KHz) with a high frequency signal (480 KHz). The two detector |
| 6892871 |
Sensor and method for discriminating coins of varied composition, thickness, and diameter |
May 17, 2005 |
| A coin discrimination sensor having an excitation coil and two detector coils arranged to detect eddy currents in a passing coin. The excitation coil is provided a composite waveform formed by adding a low frequency signal (30 KHz) with a high frequency signal (480 KHz). The two detector |
| 6755730 |
Disc-type coin processing device having improved coin discrimination system |
June 29, 2004 |
| A coin processing system for processing a plurality of coins of mixed denominations comprises a rotatable disc for imparting motion to the plurality of coins, a sensor for differentiating between valid and invalid coins, a stationary sorting head, a diverter and a controller. The sta |
