Abstract: The present invention is a heater box for use in combination with a heating unit in an improved portable soldering furnace which includes a casing having a base and a hood which covers the base. The base has a first compartment wherein a soldering iron, having a shaft, a handle and a soldering head, and a second compartment. The heating unit includes a cylindrical bottle, which holds a flammable gas under pressure, a valve, which is mechanically and fluidly coupled to the cylindrical bottle, and a burner tube, which is mechanically and fluidly coupled to the valve. The heating unit is disposed in the second compartment of the base.The heater box includes a heating chamber having a back wall, a bottom wall and a pair of side walls and being open at both its front and its top and it is disposed in the second compartment of the base and mechanically coupled to the heating unit. The heater box also includes an insulating apparatus for insulating the heating unit from the heating chamber.

Abstract: The present invention is a universal chuck adaptor which is used in combination with a yankee screwdriver in order to mechanically couple a drill chuck to the yankee screwdriver which includes a handle. The yankee screwdriver also includes a ratchet mechanism which is mechanically coupled to the handle and a release mechanism which is mechanically coupled to the ratchet mechanism. The universal chuck adaptor includes an integral member which has a cylindrical portion at its center, a right-handed, externally threaded cylindrical portion at one end with a left-handed, internally threaded bore and a truncated cylindrical portion with a notch. The truncated cylindrical portion is adapted to be slideably received within the release mechanism and secured thereby. The drill chuck is threadedly coupled to the right-handed, externally threaded cylindrical portion. A left-handed threaded screw securely coupled the drill chuck to the universal chuck adaptor through the left-handed, internally threaded bore.