Card speed determination in a card reader
US4782455A · kind A · utility
8Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | May 18, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K13/067
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A card reader control system includes a measuring device which measures a time interval of a clock signal which is developed from a card reader when a card is manually driven to travel in the card reader. The card reader control system stores the maximum time interval and the minimum time interval of the clock signal measured by the measuring device. When either one or both of the maximum time interval and the minimum time interval is not included in a preferred range, an alarm buzzer is enabled to indicate that the card speed is not suited for the reading operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.