Using two thermal switches to control a hybrid lamp
US8723430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2011 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Oct 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp assembly provides both instant light through use of an incandescent/halogen light/lamp source and an energy saving type light provided by a compact fluorescent light/lamp source. Both light sources are enclosed within a common envelope or outer bulb. First and second thermal sensors are provided in the lamp envelope at spaced locations to monitor the temperature of the lamp. When the sum of these two temperatures reaches a preselected value, power to the incandescent lamp source is terminated. Alternatively, when the difference these two temperatures reaches a preselected value, power to the incandescent lamp source is terminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.