Gas ignition circuits
US4521825A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1983 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Oct 17, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23Q3/004
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Circuit arrangements for use in the generation of sparks for igniting gas at a gas burner assembly whereby the operation is controlled electrically by means of an electronic control circuit which reacts to the presence or absence of a gas flame. The circuit comprises a charging circuit for a charge storage capacitor, a spark output transformer, an SCR switching device for discharging the charge stored in the capacitor and a non-linear conductive element connected between the anode and the gate of the SCR. Therefore when the anode voltage reaches the required value a trigger signal is applied via said non-linear conductive element to the gate to trigger the discharge of the capacitor by the SCR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.