Perforated tape reader
US4044230A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Apr 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/047
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a perforated tape reader, the tape is sensed by detecting elements rotatable on one end of rocker arms. The other end of the rocker arms is provided with a fork. A flat spring urges on the upper arm of the fork and a conductive resilient element is engaged between the arms of the fork. When the detecting elements sense a perforation on the tape, the conductive element abuts against a fixed electric contact in a intermediate position between the arms of the fork; when the detecting elements sense no perforation the lower arm of the fork lifts the conductive element in order to open the electric contact. Since the space between the arms of the fork is greater than the thickness of the conduction element, but less than the shifting of the fork, any small amplitude movements of the rocker arms in not transmitted to the conductive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.