Shutoff circuit for sensor controlled switch
US5124566A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Sep 19, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a shutoff circuit for a sensor controlled switching apparatus which does not require an additional high current switch. A two pole low current switch is used with one pole providing a control signal to the high current switch to open the high current switch. The other pole is connected between the AC line and a rectifier for a voltage regulator for the sensor circuitry. The second pole of the low current switch removes the power from the sensor circuitry. By piggy-backing a second pole on the switch, this switch can activate the primary power switch connected in series with the AC line without requiring a separate switch inserted in the AC line itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.