Combination geodetic transit compass and signal mirror
US4395828A · kind A · utility
13Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1980 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Jul 10, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A geodetic compass having a mirrored cover that has the dual purpose of providing means for reading the compass needle orientation for geodetic purposes, while at the same time having cross hatch diffractional sighting means incorporated in said cover and mirror for utilizing said mirror for emergency signalling purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.