Level straight-edge apparatus and method of construction
US5279041A · kind A · utility
Inventor
Key dates
| Filing date | Oct 5, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Oct 5, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring instrument provided with measuring vials for determining level or pitch relationships and a graduated straight edge for measuring linear distance. In the first embodiment, the instrument consists of a composite aluminum and plastic structure where the plastic structure forms the body portion having the vial holders and viewing windows and the aluminum portion forms the graduated straight edge. A second embodiment consists of an aluminum structure having a flat elongated frame portion and an integrally formed base portion disposed perpendicularly thereto. The frame portion forms the graduated straight edge and carries the measuring vials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.