Automatic temperature and humidity regulation – Miscellaneous – Burner controls with automatic cutoff
Patent
1978-04-14
1979-11-27
O'Dea, William F.
Automatic temperature and humidity regulation
Miscellaneous
Burner controls with automatic cutoff
236 68R, 431 20, F23N 300
Patent
active
041756959
ABSTRACT:
An improved flue damper for isolating furnace from chimney-flue when burner is not operating includes in preferred embodiment a damper plate pivotally mounted within a flue section on a control rod extending through the flue section to bearing support in a bracket spaced from the flue section by a frame affixed to the flue section exterior; a bimetallic strip spiral having inner end affixed on the control rod and outer end detachably looped over a stud extending from the frame rotates the control rod under thermal actuation provided by an electric heating element adjacent the bimetallic strip spiral; a damper control strip on the end of the control rod adjustably affixes a switch plate rotatable therewith and bearing a first mercury switch controlling the heating element circuit and a second mercury switch controlling the furnace burner circuit; stop structure on the bracket limits rotation of the damper control strip and control rod.
REFERENCES:
patent: 1300990 (1919-04-01), Meacham
patent: 2095951 (1937-04-01), McCabe
patent: 2118299 (1938-05-01), Ellis
patent: 2154644 (1939-04-01), Sweatt
patent: 2155642 (1939-04-01), Dewey
patent: 2633299 (1953-03-01), Brown, Jr.
patent: 2761494 (1956-09-01), Field
patent: 2856992 (1958-10-01), Bartels
patent: 3050601 (1962-08-01), Bohn
patent: 3197139 (1965-07-01), Diermayer et al.
patent: 4046318 (1977-09-01), Ripley
McClellan, Sr. John F.
O'Dea William F.
Tapolcai, Jr. William E.
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