Instrument for measuring vertical distances
US4845855A · kind A · utility
Inventor
Key dates
| Filing date | Apr 28, 1988 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Apr 28, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/061
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring instrument having a column 2 mounted on a base and a sliding unit 3 adapted for vertical displacement on said column 2. The sliding unit 2 has a housing 9 and a plate 10. The housing 9 is suspended on the column 2 by means of a cable 7 which is provided with a balancing weight. The plate 10 carrying a gauging element 5 is operatively connected by a counterweight device 17 to the housing 9. The counterweight device 17 has a lever 16 which is mounted on the housing 9. Lever 16 has a weight mounted on one end thereof. The other end of the lever 16 accommodates ball bearings 21 which serve to support plate 10 through cams 22. The instrument has a latching device 23 for establishing a zero position between plate 10 and housing 9 and for enabling adjustment of a measuring force. A damping device 26 interposed between plate 10 and housing 9 enables to cushion jolts occurring on the gauging member 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.