Safety switch for a combustion system
US4401425A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1980 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Nov 18, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2225/08
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
This invention relates to a method and apparatus for shutting down a combustion system when a pressure greater than atmospheric pressure is present in the flue pipe of the system. The apparatus comprises a connector means for connecting the flue pipe of the system with the surrounding atmosphere and a thermal switch which is in thermal contact with and responds to the gases within the connector means. The apparatus is especially useful as a safety device for shutting down an induced draft combustion system when the flue pipe of the system is blocked. Also, the apparatus can be used with a combustion system having a flue outlet vent which is also used as the outlet vent for another combustion system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.