Badge reader with reliable data clocking means
US4187980A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1978 |
| Grant date | Feb 12, 1980 |
| Priority date | — |
| Expiry date | Jun 29, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus is disclosed for reading a data encoded badge or document, wherein the operator manually inserts the badge into the reader. In the preferred embodiment, there is provided a movable slide element having clock holes thereon and means for ensuring that such slide moves in synchronism with the badge as it is inserted into and withdrawn from the reader by the operator. Suitable sensors and accompanying electronics are provided to synchronize the reading of data from the card with the detection of the passage of slide clock holes past a predetermined point in the reader. Special reader electronics is provided to ensure reliable clock detection, and to inhibit false generation of clock signals which could result from sensor ringing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.