Portable hand-held voltage sensor with manually adjustable reference voltage for comparison with sensed voltage
US4634971A · kind A · utility
26Cited by
29References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/16561
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A hand held voltage sensor in which a low impedance test lamp mode or a high impedance voltage test mode is selectable via a thumb accessed slide switch. In the high impedance mode, three light emitting elements provide indication of the value of voltage potential between a probe conductor and an associated ground conductor being above, below or pulsing above an adjustable threshold level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.