Combustion – Timer – programmer – retarder or condition responsive control – Of or by exhaust damper or exhaust pump
Patent
1975-08-15
1977-05-03
Croyle, Carlton R.
Combustion
Timer, programmer, retarder or condition responsive control
Of or by exhaust damper or exhaust pump
126285B, 236 16, F23N 300, F23N 302
Patent
active
040211878
ABSTRACT:
A flue gate device operated by a solenoid whose energy comes from any outside source, which energy is controlled by the furnace burner control of the furnace to which it is attached. The pull of the solenoid is resisted by a spring which will restore the flue gate to an open position when the solenoid is deenergized or in case of an electrical failure in the flue gate device itself. Through relay switches, the solenoid is deenergized when the furnace burner is energized, and the solenoid is energized when the burner is deenergized, thus enabling a "fail-safe" condition, which enables the furnace to function completely free of the flue gate device.
REFERENCES:
patent: 2166242 (1939-07-01), Doolittle
patent: 2179120 (1939-11-01), Firehammer
patent: 2224705 (1940-12-01), Stringer
patent: 2357642 (1944-09-01), Firehammer
Schulte Milton Robert
Swartz George Albert
Casaregola L. J.
Croyle Carlton R.
Thermal Developments, Inc.
Weingram Edward R.
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