U.S. Patent Specifications

Combustion apparatus comprising a burner having a nozzle portion provided with an orifice effective to produce a diverging fuel spray, means defining a chamber surrounding said burner and including an inner annular air diverting and directing wall shaped and arranged to form with the nozzle portion of the burner an inner annular air passage of decreasing cross sectional area in the direction of air flow therethrough, and an inner member surrounding the orifice end of said nozzle portion in passage forming relation there‐with, said member being axially spaced from the inner peripheral edge of said annular wall in the direction of air flow to divert and direct a portion of the air issuing from said inner passage inwardly against said fuel spray at a point immediately adjacent said orifice.