Equipment and method for measuring convergence
US4913499A · kind A · utility
5Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1988 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Nov 16, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F17/185
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A transducer is placed in a telescopic strut and connected to a roof cam and a floor cam. The cams are pivoted to a roof support and a constant load is applied to the cams by a gas spring. As convergence takes place a transducer in the telescopic strut records the relative movement between the floor and roof and transmits this as an electrical signal for analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.