Liquid-level detector
US4132899A · kind A · utility
16Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1976 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Jul 22, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/906
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light-emitting element and a light-responsive element are optically connected with each other through a U-shaped optical guide. An output level of the light-responsive element indicates whether the U-shaped guide is above or below the liquid-level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.