Ice stress gauge
US4402226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1980 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Dec 11, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0091
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A stress gauge comprising a pair of substantially circular metal sheets welded together along their circumference, a metal tube in communication with the space between metal sheets, a pressure transducer attached to the metal tube and a slightly pressurized fluid filling the tubing and the space between the metal sheets. Liquid pressure is selected to provide a desired volume between the two plates, thereby providing a proper aspect ratio and preferably reducing the sensitivity of the gauge to temperature changes. When positioned in a solid ice sheet, pressure output indications from the pressure transducer are directly correlated to stress in the ice normal to the plane of the metal sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.