Low current pilot light and switch
US4340826A · kind A · utility
16Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 1981 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | May 7, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B5/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An indicator light for a switch to show when a remote load is energized is provided for installations where no neutral wire is available at the switch box. A circuit including a gas discharge indicator lamp, a diode-resistor charging circuit and a capacitor across the lamp is connected between the load side of the switch and the grounding conductor in the switch housing. Current through the circuit is sufficiently small to create no hazard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.