Control of display devices with electromagnetic drums
US4283715A · kind A · utility
37Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1979 |
| Grant date | Aug 11, 1981 |
| Priority date | — |
| Expiry date | Oct 12, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/252
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A control device for digital display indicators using electromagnetic drums. An analogue/digital converter converts the information to be displayed, received in analogue form E, into digital information which can be utilized by the drums of the display device. The renewal frequency of the information delivered by the analogue/digital converter is made a function of the rate of change of the information by means of a differentiator which calculates the derivative dE/dt and a means of comparing voltages and/or frequencies and means of controlling the analogue/digital converter and/or all or a proportion of the display drums.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.