Liquid-crystal indicator of voltage presence
US7336338B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Sep 29, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/155
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The subject of the invention is a liquid crystal indicator of voltage presence in electric conductors and equipment. The device is used to indicate the presence of an AC voltage, especially in medium and high voltage systems. The indicator according to the invention comprises two substrate layers on which conducting layers are deposited, and a terminal being an external electric output of the indicator is connected to the conducting layer. A structure containing liquid crystal is located between these layers. A fragment of each segment deposited on one substrate layer overlaps with at least one fragment of a segment deposited on the other substrate layer, and the overlapping fragments of the conducting segments from both substrate layers, together with a part of the intermediate liquid crystal layer, form liquid crystal elements of the indicator, which are electrically connected in series.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.