System for indicating measured values
US4227150A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1978 |
| Grant date | Oct 7, 1980 |
| Priority date | — |
| Expiry date | Jul 6, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/248
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for indicating measured values, particularly the speed of movement of a motor vehicle, includes a pulse generator generating pulses having a frequency corresponding to a measured value, a counting circuit including first and second counters for counting pulses generated during successive time intervals to produce a pulse count signal for each time interval, a comparator comparing the pulse count signals from successive time intervals to produce a pulse difference signal corresponding to the difference therebetween, a memory for storing the pulse difference signal and transmitting the pulse difference signal to a stepper motor, and a pointer driven via gears from the output of the stepper motor to produce an indication of the measured value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.