Automatic temperature and humidity regulation – Miscellaneous – Burner controls with automatic cutoff
Patent
1981-10-02
1983-09-06
Tapolcai, William E.
Automatic temperature and humidity regulation
Miscellaneous
Burner controls with automatic cutoff
428617, G05D 2308
Patent
active
044024541
ABSTRACT:
A thermally responsive damper for opening the flue of a gas-fired apparatus when gas firing occurs and for otherwise closing the flue to prevent unnecessary energy losses utilizes a low cost, high flexivity, thermostat metal adapted to operate in the corrosive flue environment, the thermostat metal having a high expansion layer of a corrosion-resistant austentic stainless steel which does not transform as it is worked during manufacture of the thermostat metal and a low expansion layer of an alloy of 36 percent nickel and the balance iron. The thermostat metal also has a thin layer of a stabilized, high chromium, ferritic stainless steel on the outer surface of the lower expansion layer for protecting the low expansion layer from corrosion in the flue gasses and for permitting the achievement of high flexivity in the thermostat metal while also permitting economical manufacture of the composite material.
REFERENCES:
patent: 2461518 (1949-02-01), Chace
patent: 2962806 (1960-12-01), Stumbock
patent: 3512947 (1970-05-01), Alban
patent: 3876819 (1975-04-01), Boyd et al.
patent: 4131720 (1978-12-01), Spengler
patent: 4191326 (1980-03-01), Diermayer et al.
Haug John A.
McAndrews James P.
Sharp Melvin
Tapolcai William E.
Texas Instruments Incorporated
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