Compact stove for emergency and other uses

A carbonaceous fueled heating device which comprises:

• a base;
• a vertically oriented continuous heat conduction metallic wall located on said base with a portion of said metallic wall located above said base and the remaining portion of said metallic wall located within and enclosed by said base, said metallic wall having continuous interior and exterior surfaces, said metallic wall having open top and bottom ends, said top end opening to the ambient environment so as to discharge heat to the ambient environment through said top end;
• an air permeable grate located within said wall upwardly displaced from said bottom end of said wall so as to divide the space enclosed by the interior surface of said metallic wall into a combustion chamber located above said grate and a primary heat exchange chamber located below said grate;
• a primary air supply means located in said base below said combustion chamber, said primary air supply means including a primary air chamber and a primary air inlet, said primary air inlet opening between the ambient environment and said primary air chamber whereby air from the ambient environment is admitted into said primary air chamber throgh said primary air inlet, said bottom end of said metallic wall opening into said primary air chamber with the portion of the interior surface of said metallic wall which is located between said bottom end and said grate serving as a heat exchanger to heat air within said primary heat exchange chamber whereby air flowing through said primary air inlet into said primary air chamber is preheated within said primary heat exchange chamber prior to passage through said grate;
• a secondary air supply means, said secondary air supply means including said exterior surface of said metallic wall and further including a continuous second wall spaced away from and continuously surrounding said portion of said metallic wall which is located above said base, said secondary air supply means further including an imperforate cap wall located on the top of and extending between said metallic wall and said second wall, together said exterior surface of said metallic wall, said second wall and said cap forming a secondary heat exchange chamber;
• said secondary air supply means further including a secondary air inlet, said secondary air inlet opening between the ambient environment and said secondary heat exchange chamber;
• said metallic wall between said top end and said grate including a plurality of air passageways between said secondary heat exchange chamber and said combustion chamber, said air passageways arranged in an array extending around said combustion chamber and vertically spaced from one another along the height of said combustion chamber between said grate and said top end of said metallic wall whereby air admitted into said secondary heat exchange chamber through said secondary air inlet prior to flowing into said combustion chamber through said passageways is heated by heat conducted from said combustion chamber by said metallic wall;
• together said second wall and said base completely enclosing said metallic wall so as to inhibit heat loss from said metallic wall directly to the ambient environment;
• a heat conducting tube means, at least a portion of which is vertically located within said secondary heat exchange chamber and at least a portion of which extends through said wall into said combustion chamber proximal to said top end of said wall;
• water supply means connected to said tube means to supply water to the interior of said tube means.