Automatic temperature and humidity regulation – Miscellaneous – Burner controls with automatic cutoff
Patent
1978-03-07
1979-06-26
O'Dea, William F.
Automatic temperature and humidity regulation
Miscellaneous
Burner controls with automatic cutoff
236 93, 236101E, 431 20, F23N 300
Patent
active
041590783
ABSTRACT:
A draft control arrangement having bimetallic damper elements mounted in a draft hood and adapted to change shape in response to temperature change to open and close the flow passage for vent gases from a combustion apparatus. The damper elements are positioned in the hood relatively close to the source of hot flue gases to provide faster opening and less tendency for vent gas spillage. When open the damper elements cooperate with stationary walls of the draft hood so that the resulting streamlined passage presents minimum flow resistance. In certain embodiments the damper elements are arranged to undergo a spreading action during opening movement to achieve a disproportionately large passage for the vent gases during the initial phase of opening. In another embodiment a damper unit is mounted separate from the draft hood and provides the same operating results as the other embodiments.
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Diermayer Werner
Kutzner Luitpold
O'Dea William F.
Tapolcai, Jr. William E.
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