Fire cube

Abstract

A fire-starter cube has a combustible box housing having a bottom, four sides and a lid, a crib of stacked wooden slats, the slats arranged around a central chimney, a plurality of openable doors within the sides configured to admit fresh air, a knock-out on the lid configured to permit the exhaust of hot gases, the removal of the knock-out providing an opening to the chimney, wherein as the cube burns, the fresh air enters the doors and exits from the opening, and wherein the air forms a vortex within the chimney. In an embodiment the cube has wooden shavings within the chimney. The doors may be perforated on three sides and the opening of the doors is selectable by a user. The heat of the burning cube bakes the slats before they ignite. In an embodiment, the lid releasably locks onto the sides of the box.

I claim: 
     
         1 . A fire-starter cube, comprising:
 a. a combustible box housing having a bottom, four sides and a lid attached to at least one of the four sides, wherein the box further comprises:
 i. a plurality of adjustable doors in communication with at least one of the four sides, wherein at least two of the plurality of adjustable doors are in communication with adjacent sides, and wherein one of the at least two doors is positioned higher than any of the other doors; 
   b. a plurality of wooden slats stacked onto one another, wherein each one of the plurality of wooden slats has a first end and a second end, wherein the first end and the second end of each wooden slat contacts a first end or a second end of another wooden slat, and wherein the plurality of wooden slats are arranged around a central chimney, and wherein the plurality of wooden slats are disposed within the combustible box;   d. a knock-out on the lid configured to permit the exhaust of hot gases, the removal of the knock-out providing an opening to the chimney,
 wherein as the cube burns, the fresh air enters the doors and exits from the opening, and wherein the air forms a vortex within the chimney. 
   
     
     
         2 . The cube of  claim 1 , further comprising wooden shavings within the chimney. 
     
     
         3 . The cube of  claim 1  wherein each of the plurality of adjustable doors are perforated on three sides and the opening of the doors is adjustable by a user. 
     
     
         4 . (canceled) 
     
     
         5 . The cube of  claim 1 , wherein the lid releasably locks onto the sides of the box. 
     
     
         6 . The cube of  claim 3 , wherein the user selects the opening of the plurality of adjustable doors using a method comprising the steps of:
 a. opening two or more of the plurality of adjustable doors, wherein one of the two opened doors is higher than the other one of the two or more opened doors;   b. air flow circulating in a vortex within the box; and   c. adjusting the two or more opened doors to control the vortex.   
     
     
         7 . The cube of  claim 3 , wherein the crib of stacked wooden slats further comprises a plurality of brad nails extending through the first end and the second end of each of the plurality of wooden slats.