Navigation instrument
US4390948A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1980 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Jun 13, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A navigation instrument comprises a first counter for counting travelling distance from a start point, a second counter for counting travelling time from starting, a means for setting a scheduled average vehicle speed, an arithmetic means for calculating average vehicle speed, the deviation of travelling distance from the scheduled distance and the deviation of travelling time from the scheduled time, and a display means for displaying the result of calculation. The first counter is capable of subtractively counting travelling distance in response to switching operation of a switching means which is incorporated to the first counter. The first counter is also incorporated with a means for stopping navigating operation which is operative when the first counter counts down the travelling distance until a given value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.