Angle and distance measuring instrument
US4916822A · kind A · utility
Inventor
Key dates
| Filing date | Dec 1, 1988 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Dec 1, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angle measuring instrument provides two straight arms connected at one end for relative pivotal movement. A telescoping assembly includes two elongated telescoping members each providing a free end. The free end of one telescoping member is pivotally connected to one arm and the free end of the other telescoping member is connected to the other arm. The telescoping members provide scales indicating the angular position between the two arms, the distance between the pivots of the free ends of the telescoping members on the arms, and a correction to be added to or subtracted from measurements along the length of the arms to establish distances from the corner which is being measured. The two arms can pivot through a full 360 degrees relative to each other, permitting the measurement of inside and outside corners of all sizes. A straight edge is removably mounted on one of the arms when measuring outside corners. A level is provided to establish the position of one of said arms relative to a horizontal direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.