Abstract: A gas burner assembly for producing a high intensity flame while also producing a flame of a large area. The burner assembly includes a hollow shell having a stem member engaged at one end thereof for supplying a combustible gaseous mixture to the shell. A circular, disk-shaped slug member which contains a plurality of cavities extending therethrough directs the flow of the gaseous mixture through the cavities. The longitudinal axes of the plurality of cavities extending through the slug member extend an angles relative to the the longitudinal axis of the shell. Part of the combustible gaseous mixture is caused to emerge from each cavity and strike and be reflected from the interior walls of the shell, causing the velocity of the gas to decrease. The reflected gaseous mixture is recombined at a lower velocity with gas stream parts which do not impinge on the shell.

Abstract: A hand trowel device for particular use in roofing and like constructions is specially provided with an integral heating means. The heating means is adapted to continuously maintain the trowel blade at a temperature sufficient to plasticize or render flowable, preferably under applied pressure, the roofing compound or roofing cement employed. The roofing compound to be plasticized may be pre-impregnated in or otherwise integrated with the roofing sheet (or "felt") material being used in the roof covering or it may be separately provided for the purpose of independently sealing and waterproofing the roof covering material, particularly lapped edge or flashed edge portions of sheet roof covering material. Also, since it is a hand trowel, the trowel device is provided with a convenient hand gripping portion to facilitate lifting, carrying and manipulating the trowel during use and, in addition, an attached safety stand for supporting the hot or heated trowel in a rest position elevated above the roof surface.