Stoves and furnaces – Stovepipes
Patent
1975-05-23
1977-03-01
Capossela, Ronald C.
Stoves and furnaces
Stovepipes
126312, 98 48, 431 20, F23J 1102
Patent
active
040097056
ABSTRACT:
A venting system for a warm-air furnace, gasfired boiler or the like heating plant has an open bottom diverter box which is arranged horizontally externally of the heating plant substantially at the level of the top thereof. The top wall of the diverter box at one end section thereof is connected by a vertically upstanding U-shaped, internally unobstructed, ducting to the top of the combustion chamber of the heating plant so that fumes flow therethrough into such combustion chamber end section of the box while the top wall of the diverter box at the other end section is connected by a vertically upstanding, internally unobstructed, piping to the flue.
The open bottom of the diverter box is in constant free communication with the air well above the base of the heating plant and the oxygen entering the open bottom establishes a cold pressure head to lock-in the generated heat in the combustion chamber while permitting only clean fumes to pass across the upper portions of the end sections of the diverter box to the flue and while preventing down drafts or blocked flues from interferring with the proper operation of the heating plant.
A safety limit switch is housed in the combustion chamber end section of the diverter box and is activated by a rise in temperature of the fumes in the instance of a blocked flue, for example, to act through the thermostat circuit and close the gas valve to shut off gas flow to the burners of the heating plant. A barrier plate is mounted in the box in protective relation with the switch to prevent any cold down drafts from coming into contact therewith and neutralizing its performance.
REFERENCES:
patent: 886391 (1908-05-01), Moore
patent: 1837581 (1931-12-01), Peterson
patent: 1840628 (1932-01-01), Howle
patent: 2002020 (1935-05-01), Nyborg
patent: 2486780 (1949-11-01), Fenberg
patent: 2698140 (1954-12-01), Buehler
patent: 2937697 (1960-05-01), Johnston
Capossela Ronald C.
Connors Edward F.
Thrifty-Vent, Inc.
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