Solid fuel stove
OwnerMarius C. Schullerinventor
Life of this patent
Estimating the term…
Abstract
A stove for burning solid fuel such as wood, coal or briquets in a more efficient manner utilizes preheated outside air for primary and secondary combustion and has tempered glass windows for observation. The combustion air flow is directed so as to minimize obscuring of the glass by deposits of unburned volatiles. A fire chamber is provided with self-feeding grate, and the stove also has a secondary grate, a high proportion of radiating and convective surfaces, a heat exchanger, a cooking surface, an automatic linkage between a fuel loading door and an opening-reducing damper to limit back drafts and thermostatic control to ensure complete combustion and efficient heat exchange. The self-feeding grate has a thermostatic grate shaker to promote unattended complete combustion, and can be replaced to match the fuel used.
Claims56
In a stove comprising a housing defining a combustion chamber, said housing being provided with a window through which said combustion chamber is visible from the exterior of said stove, means defining an inlet for admitting an inflow of air into said combustion chamber, means for supporting fuel for combustion in said combustion chamber and means for directing a portion of said air inflow upwardly past a surface of said window facing inwardly of said combustion chamber, the improvement comprising means for deflecting said air inflow portion from said inlet opening under and in contact with said fuel support means for preheating said air inflow portion prior to arrival thereof at said window surface.
A stove, comprising:
- means defining a combustion chamber;
- grate means in said combustion chamber for supporting fuel to be combusted;
- said combustion chamber defining means comprising a vertical window in the front of said stove through which the combustion chamber is visible from the exterior of said stove;
- a horizontal inlet opening located under said grate means at the bottom of said combustion chamber for the inflow of air into said combustion chamber through said grate means;
- a horizontal outlet opening at the top of said combustion chamber for the outflow of gases from said combustion chamber;
- said inlet and outlet openings, said grate means, said combustion chamber and said window being elongate in the direction of the width of said stove;
- an air inlet communicating with said inlet opening for supplying the air thereto;
- means for controlling air flow through said inlet;
- and
- means in said combustion chamber for deflecting portion of the air upwardly past the face of said window directed inwardly of said combustion chamber.
A stove, comprising:
- a firebox defining a combustion chamber;
- a primary combustion air inlet communicating with said chamber;
- means for controlling the inflow of air through said air inlet into said chamber;
- a combustion gas outlet communicating with said chamber;
- means for supporting fuel for combustion within said chamber;
- said firebox being provided with a window through which said chamber is visible from the exterior of said firebox;
- and
- means defining a secondary combustion air flow passage extending under and in contact with said fuel support means for deflecting secondary combustion air from said primary combustion air inlet past said fuel support means for preheating said secondary combustion air and past a surface of said window facing inwardly of said chamber, whereby the deflected air counteracts deposition of combustion products on said window surface.
A stove, comprising:
- a firebox defining a combustion chamber;
- means for supporting fuel in said combustion chamber during combustion of the fuel;
- means defining a fuel inlet opening in said firebox for insertion of the fuel into said combustion chamber;
- door means for closing said fuel inlet opening;
- an ash receptacle beneath said fuel support means;
- said fuel support means comprising means defining an ash opening therein through which ash can fall downwardly to said ash receptacle, and fuel support bars downwardly inclined towards said ash opening at opposite sides thereof for promoting movement of the fuel under gravity towards said ash opening;
- a combustion air inlet communicating with said ash receptacle to provide an upward combustion air flow through said ash opening;
- plates downwardly inclined towards said ash opening;
- one of said plates forming part of a duct means for deflecting part of said air flow beneath said fuel support means to provide a flow of preheated secondary combustion air to an upper region of said combustion chamber to promote secondary combustion;
- and
- auxiliary fuel support means in said ash receptacle for supporting partially combusted fuel in the air flow below said ash opening to preheat the upward combustion air flow through said ash opening.
In a stove, comprising:
- means defining a combustion chamber;
- means for supporting fuel for combustion in said combustion chamber;
- an air inlet for supplying a inflow of combustion air to said support means;
- and
- an outlet for the outflow of combustion gases from said combustion chamber;
- the improvement comprising:
- first air flow constriction means defining a straight horizontal elongate air inlet opening through which said air inlet communicates with said combustion chamber, said air inlet opening being located under said fuel support;
- second air flow constriction means defining a straight horizontal elongate combustion gas outlet opening through which said combustion chamber communicates with said outlet;
- said outlet opening extending parallel to and being vertically spaced from said inlet opening;
- and
- said support means being adapted to support fuel along the length of said inlet opening;
- whereby a wide flame is produced on combustion of the fuel;
- and
- a window parallel to the longitudinal directions of said openings, the interior of said combustion chamber being visible through said window from the exterior of said stove.
A stove comprising:
- a lower chamber for containing ashes;
- an air inlet communicating with said lower chamber;
- an upper chamber forming a heat exchanger;
- a combustion gas outlet communicating with said upper chamber;
- a combustion chamber intermediate said upper and lower chambers;
- a fuel inlet opening into said combustion chamber;
- a door for closing said fuel inlet;
- a first elongate opening between said lower chamber and said combustion chamber;
- a second elongate opening between said combustion chamber and said upper chamber;
- said stove having an external surface defining elongate recesses in the exterior of said stove between said chambers;
- said first and second openings extending between said recesses and being parallel;
- and
- means within said combustion chamber above said first opening for supporting fuel during combustion, said supporting means defining gaps through which ashes and partially combusted fuel can fall through said first opening into said lower chamber;
- said first elongate opening being located under said fuel supporting means;
- and
- said first and second openings, said combustion chamber and said upper and lower chambers being elongate widthwise of said stove to form a wide flame in said combustion chamber.
Dependencies are inferred from the claim text.