Safety circuits for electrical products
US10164421B1 · kind B1 · utility
1Cited by
6References
15Claims
0Family size
Inventor
Key dates
| Filing date | Dec 22, 2016 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Sep 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/044
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The response of a switch supplying electrical power to a load is periodically tested to ensure proper operation and control over the switch. In the event the switch does not respond to commands from a controller during a test cycle to turn off and open a circuit supplying power to the load, a short circuit is created by a test switch. In this event, a fuse is automatically blown preventing uncontrolled power from reaching the load. In one example, the load can take the form of a resistive heating element in an electric heating blanket or electric heating pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.