Switch state assurance system
US7642674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2006 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Oct 25, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switch state assurance mechanism of a power stealing circuit for connection to a thermostatically controlled or other kind of operational system. The mechanism may be an interface for the power stealing circuit to the operational system. A switch or relay of the mechanism may have several states but have an appropriate state for a given status of the power stealing circuit and the operational system. The switch or relay may have a latching characteristic relative to its states. The mechanism may have a detection circuit and a drive circuit connected to the relay, and a control circuit connected to the detection circuit and the drive circuit. The mechanism may check the relay state and change the relay to a desired state. The mechanism may be incorporated in other circuits beside a power stealing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.