Programmed control module for inductive coupling to a wall switch
US5264761A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1991 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Sep 12, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B39/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp control module including a housing having a receptacle therein with a transformer winding wound around the inner walls of the receptacle in being operatively driven by a programmed microprocessor. The transformer winding of the module is further operative to be inductively coupled to a second transformer winding which is located within an on-off switch knob of a wall switch panel, and the second transformer winding is further connected to the gate electrode of an AC switch. Pulses which are generated in the lamp control module and controlled by data values stored in the microprocessor therein are transformer coupled from the housing receptacle transformer winding into the knob switch transformer and then to the gate electrode of the AC switch. These pulses are operative to control the phase angle and conduction time of the Triac and in turn control the conduction time that an AC voltage is applied from an external AC voltage source to a lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.