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US 3,982,525 AGranted
Hot air furnace
OwnerJohn A. Hermaninventor
Life of this patent
Estimating the term…
Abstract
A hot air furnace having a fire box and a plurality of heat exchange units connected together in series, the front wall of said furnace being common to said fire box and said heat exchange units and the remaining walls of said furnace being spaced from said fire box and wall, the furnace employing a mechanical draft control system which simultaneously regulates an air intake to the fire box and an air intake to the exhaust duct from the furnace to uniformly regulate the temperature in the furnace.
Claims17
In a hot air furnace, the combination of;
- a rectilinear housing having an exhaust outlet, a firebox disposed in said housing, a plurality of heat exchange members forming elongated chambers within said housing and above said firebox, passage means communicating said chambers in series, one chamber at one end of said series of chambers being connected to said firebox to receive products of combustion therefrom and a chamber at the other end of said series of chambers being connected to said exhaust outlet to discharge products of combustion therefrom, one wall of said housing and one wall of each of said chambers being in common with each other, the remaining walls of said chambers being spaced from each other and from the walls of said housing to permit the passage of air, said housing having an air inlet adjacent the bottom of said housing for receiving relatively cool air, and an air outlet adjacent the top of said housing for discharging warm air passing around said heat exchange members.
In a hot air furnace, the combination of;
- a housing, a firebox in said housing, an air inlet formed in said firebox, a damper member movable between positions opening and closing said air inlet, an exhaust member communicating with said housing and with said firebox, said exhaust member forming an air intake opening, a closure member movable between open and closed positions relative to said intake opening, control means movable in response to changes in temperature in said housing and being operatively connected to said damper member to move the latter from an open towards a closed position upon an increase in temperature in said housing and to simultaneously move the latter from a closed toward an open position, said control means including a shaft rotatably mounted in said housing, a bimetal element coiled about said shaft and being responsive to changes in temperature to coil and uncoil, said bimetal element having one end connected to said shaft and the other end fixed relative to said housing whereupon changes in temperature in said housing rotates said shaft, means operatively connecting said damper member and said closure member to move the latter upon rotation upon said shaft, an arm member movable in response to movement of said shaft, and a weight member on said arm movable longitudinally thereof to vary the response of rotation of said shaft for any given temperature.
Dependencies are inferred from the claim text.