Pot-type burner

Abstract

A pot-type burner comprises an open burner having a pot formed by a cylindrical wall defining a column with a bottom wall and an open top, a means for supplying liquid fuel to the vicinity of the bottom wall within the pot, and a first column barrier for restricting the flow of vapor derived from the liquid fuel. The first barrier is spaced axially from the bottom wall in order to form a first chamber with a restricted throat, a second column barrier is spaced axially within the pot, from the first barrier, the second barrier comprising a catalyzer plate extending in a plane normal to the axis of the pot, the catalyzer plate having a central opening, radially extending, spaced apart fins and an annular portion near the first wall of the pot but spaced therefrom to define an annular opening with the first wall. The fins each have a planar component extending axially relative to the column, the second barrier defining a second chamber and the first wall having perforations at least at the level of the second chamber in order to supply air to support combustion of the vapors at the second chamber whereby a blue flame will be sustained in the column at the catalyzer plate.

I claim:  
     
         1 . A pot-type burner comprising an open burner having a cylindrical wall defining a pot forming a vertical column with a bottom wall and an open top, means for supplying liquid fuel to the vicinity of the bottom wall within the pot, and a column barrier is spaced vertically within the pot, spaced from the bottom wall, the column barrier comprising a catalyzer plate, extending in a plane normal to the axis of the pot, the catalyzer plate having a central opening, and radially extending, spaced apart fins whereby fuel vapours passing by the fins will absorb heat from the fins to produce a blue flame.  
     
     
         2 . A pot-type burner as defined in  claim 1  wherein a ring is provided between the bottom wall and the catalyzer plate to define first and second chambers and the ring defines a restricted throat between the first and second chamber for the purpose of retaining the vapours in order to increase the temperature of the vapours within the pot.  
     
     
         3 . A pot-type burner as defined in  claim 2  wherein the second chamber includes an annular series of air holes defined in the cylindrical wall defining the pot in order to provide air to mix with the vapours before passing through the catalyzer plate.  
     
     
         4 . The burner as defined in  claim 1  wherein the catalyzer plate includes a first ring defining a central opening along the axis of the column, a second ring in the plane of the first ring but spaced radially therefrom, the second ring defining an annular space between the wall defining the pot and the periphery of the second ring, and a series of radially extending fins extending between the first and second rings with each fin defining a plane extending axially of the column.  
     
     
         5 . The burner as defined in  claim 4  wherein the second ring is fabricated separately from the first ring and the fins extend as one-piece from the first ring and are alternately staggered to overlap top and bottom surfaces of the second ring.  
     
     
         6 . The burner as defined in  claim 4  wherein a plurality of tongues extend from the periphery of the second ring to abut the wall defining the pot in order to maintain the annular space between the wall and the periphery of the second ring.  
     
     
         7 . The burner as defined in  claim 6  wherein the first ring includes an annular series of openings.  
     
     
         8 . A pot-type burner comprises an open burner having a pot formed by a cylindrical wall defining a column with a bottom wall and an open top, a means for supplying liquid fuel to the vicinity of the bottom wall within the cylinder, and a first column barrier for restricting the flow of vapour derived from the liquid fuel, the first barrier spaced axially from the bottom wall in order to form a first chamber with a restricted throat, a second column barrier spaced axially within the pot, from the first barrier, the second barrier comprising a catalyzer plate extending in a plane normal to the axis of the pot, the catalyzer plate having a central opening, radially extending, spaced apart fins and an annular portion near the first wall of the pot but spaced therefrom to define an annular opening with the first wall, the fins each having a planar component extending axially relative to the column, the catalyzer plate defining a second chamber with the first barrier and the first wall having perforations at least at the level of the second chamber in order to supply air to support combustion of the vapours at the second barrier whereby a blue flame will be sustained in the column at the catalyzer plate.  
     
     
         9 . The burner as defined in  claim 8  wherein the first barrier includes a barrier ring normal to the axis of the cylinder, the barrier ring having a planar web portion with axially extending peripheral and inner flanges and wherein the inner flange defines the throat.  
     
     
         10 . The burner as defined in  claim 8  wherein the ring is removably supported within the cylinder.  
     
     
         11 . The burner as defined in  claim 9  wherein the first ring defines a central opening and extends in a plane normal to the axis of the pot, a second ring spaced radially from the first ring and the second ring spaced slightly from the wall of the cylinder to define an annular opening between the first wall and the periphery of the second ring, and the fins are flat, planar panels extending radially and axially.  
     
     
         12 . The burner as defined in  claim 11  wherein the second ring has parallel outer and inner surfaces and alternating fins overlap the inner and outer surfaces.  
     
     
         13 . A catalyzer plate for use in a pot-type burner having a cylindrical wall with a bottom wall and an open top, the catalyzer plate having a central opening, radially extending spaced-apart fins terminating at an annular outer ring, the fins each having a planar component extending normal to the plane of the plate to thereby improve heat exchange that will occur at the level of the catalyzer plate between the fins.