Safety switch for a combustion system

Details Safety switch for a combustion system Safety switch for a combustion system

1980-11-18

1983-08-30

Wayner, William E.

Combustion

Timer, programmer, retarder or condition responsive control

By sensing of gas leakage, flashback or escaped flame

431 21, F23N 524

Patent

active

044014252

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.

REFERENCES:
patent: Re28013 (1974-05-01), McLarty
patent: 3111978 (1963-11-01), Peoples
patent: 3537803 (1970-11-01), Ignazio

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