Burner for a boiler

Claim 1

A BURNER FOR A BOILER COMPRISING, A FIRE POT HAVING A CYLINDRICAL BODY DEFINING A COMBUSTION CHAMBER, A DOMESHAPED END WALL CLOSING ONE END OF SAID BODY AND A CHOKE AT THE OTHER END OF SAID BODY, A PLURALITY OF COMBUSTION THROAT HAVING INNER AND OUTER ENDS AND BEING CIRCUMFERENTIALLY AND EQUALLY SPACED AROUND SAID BODY ALONG A SINGLE TRANSVERSE PLANE SPACED CLOSELY ADJACENT TO SAID END WALL, AND A BURNER NOZZLE FOR EACH THROAT, THE LONGITUDINAL AXIS OF EACH BURNER NOZZLE AND EACH THROAT BEING COAXIAL AND BEING ANGULARLY DISPLACED FROM A RADIAL LINE PROJECTING FROM THE LONGITUDINAL AXIS OF THE FIRE POT AND INTERSECTING THE AXIS OF THE ASSOCIATED THROAT AND BURNER NOZZLE AT THE INNER WALL OF THE FIRE POT SO THAT EACH BURNER NOZZLE IS ARRANGED TO DIRECT ITS SPRAY NOZZLE, ACROSS THE SPRAY PATTERN OF AN ADJACENT SPRAY NOZZLE, MEANS POSITIVELY DELIVERING COMBUSTION AIR THROUGH SAID THROATS, AND MEANS FOR PROVIDING AN AIR CURTAIN ALONG THE INSIDE WALLS OF SAID BODY TO COOL SAME, SAID AIR CURTAIN MEANS INCLUDING A PLURALITY OF HOLES EXTENDING THROUGH SAID BODY AT THE CHOKE END THEREOF AND BEING PARALLEL TO THE LONGITUDINAL AXIS OF SAID BODY, SAID HOLES OPENING ADJACENT TO THE INSIDE WALLS OF THE BODY.