Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1981-02-26
1982-08-10
O'Connor, Daniel J.
Stoves and furnaces
Hot-air furnaces
Compressed air
126112, 126117, 126193, 237 55, F24H 302
Patent
active
043432905
ABSTRACT:
A hot air furnace has an outer housing and a firebox positioned within the housing. A space between the outer housing and the firebox defines a pre-heating chamber which communicates through an air distribution blower to a lower chamber and an upper chamber within the housing. The walls of the firebox are hollow and open into the lower chamber and the upper chamber so that air extracted by the distribution blower from the pre-heating chamber and directed into the lower chamber is heated as it is channeled up through the hollow walls of the firebox prior to entering the upper chamber. A smoke chamber is located within the upper chamber and it serves to further heat the air entering the upper chamber. A combustion air blower is provided and it together with the distribution blower is automatically controlled by a thermostat located within the space to be heated. An anti-puffing device on the furnace loading chute is operated in conjunction with the chute door latching mechanism to permit air to enter the firebox prior to the door being opened thus preventing flames from leaping out of the furnace and injuring a person attempting to load the furnace.
REFERENCES:
patent: 2284674 (1942-06-01), Murdock
patent: 2466868 (1949-04-01), Scott
patent: 4044820 (1977-08-01), Nobles
patent: 4083398 (1978-04-01), Fallon
patent: 4201187 (1980-05-01), Skow
patent: 4202318 (1980-05-01), De Podesta
patent: 4232651 (1980-11-01), Lind
patent: 4241874 (1980-12-01), Schossow
patent: 4275705 (1981-06-01), Schaus et al.
patent: 4291669 (1981-09-01), Herne
patent: 4292950 (1981-10-01), Schossow
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