Patent ID: 7097448

Claim:
A vortex type gas lamp for producing an upwardly-directed vortex flame of combustible gas inside a surrounding and confined boundary of rotating body of air, there existing during operation an interface located between said body of air devoid of said gas and a central region of said gas bounded by said interface inside of which substantially all of the combustion of said gas occurs, said lamp having a central axis and comprising: a base having a base surface extending laterally from said central axis, with provision to supply combustible gas without air at and nearly adjacent to said central axis; a shield comprising a first and a second axially-extending section, each said section having an upper end and a lower end, each said section being structurally attached to said base at its lower end in fluid-sealing relationship therewith, said sections being substantially identical and transparent to light, each constituting an impermeable wall having an arcuate inner surface and an arcuate outer surface, each said section having a first and a second edge extending axially from end to end; said first and second walls alternately overlapping one another and adjacent to their edges spaced from one another so as to form tangentially-directed ports, thereby forming an axially-extending chamber open at its side only through said ports; said sections being so disposed and arranged that at the base they surround the entry of the combustible gas; said gas receiving air for combustion only through said ports, whereby combustion of the gas results in a flame spaced from said inner surfaces, with said peripheral body of air devoid of gas entering through said ports.