User calibrated electronic speedometer and odometer
US4167699A · kind A · utility
31Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1977 |
| Grant date | Sep 11, 1979 |
| Priority date | — |
| Expiry date | Mar 25, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P21/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit is disclosed for driving an electronic speedometer (or tachometer) and an associated odometer of the type suitable for use in automobiles, trucks and tractors. The circuit includes a programmable divider which can be user calibrated so that a change in a system parameter, such as tire size, can be accommodated. The circuit employs a pulse generator producing timing pulses for a magnetically driven air core gauge. The timing pulses are produced in response to pulses indicative of the remote condition being sensed as, for example, wheel rotation or engine speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.