Horizontal film balance having wide range and high sensitivity
US4413506A · kind A · utility
4Cited by
0References
10Claims
0Family size
Inventors
Key dates
| Filing date | Mar 5, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Mar 5, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2013/0233
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thin-film, horizontal balance instrument is provided for measuring surface tension (surface energy) of thin films suspended on a liquid substrate. The balance includes a support bearing and an optical feedback arrangement for wide-range, high sensitivity measurements. The force on the instrument is balanced by an electromagnet, the current through the magnet providing a measure of the force applied to the instrument. A novel float construction is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.