Abstract: Disclosed is a continuous atmosphere controlled furnace for aluminum brazing and other purposes. A plurality of pots are suspended from a circular roof rotatable in a horizontal plane and arranged in a circle having a center on the axis of rotation of the roof. Each pot comprises a body having an open top and a cover capable of closing the open top of the body. The open top of each pot projects above the roof and that portion of each pot which contains the material to be heated extends downwardly below the roof. The material to be heated is supported on a hanger depending from the cover of each pot and the cover is lowered to place the material in the pot and close the pot. The furnace further includes an atmosphere gas distributor having its center on the axis of rotation of the roof and connected to the pots by gas supply and exhaust ducts. A method of supplying atmosphere gas through the pots is also described.

Abstract: An apparatus for treating a workpiece at elevated temperatures and pressures comprising an elongate cylindrical pressure vessel. Within the pressure vessel a hearth sits upon a pedestal. A cavity near the base of the pedestal defines an impeller chamber. An impeller is positioned in the chamber and has a downwardly extending drive shaft which is magnetically driven from outside the pressure vessel.

Abstract: A method for cooling gas chromatograph ovens with ambient room temperature air utilizing two separate air passages through an oven door. The door remains closed during the heating and cooling cycles which take place inside the oven housing. A rotating stirring fan internal to the oven creates regions of relatively higher and lower air pressures. The two air passages are disposed adjacent to these pressure regions to draw room temperature air into the oven, and to exhaust hot air from the oven. Within the oven door there is a movable, spring mounted, oven closure hatch in which the first air passage is located. This air passage is opened and closed by a movable cover. The hatch also establishes the second air passage when it is spaced-apart from the oven housing. Both air passages are opened and closed in response to movement of the hatch. An actuation device that can interface with a programmable actuation controller opens and closes the hatch as necessary for cooling the inside of the oven housing.

Abstract: The air flow in one zone of a gypsum wallboard dryer involves removal of the air from the wallboard drying section at one end of the elongate wallboard drying section, followed by directing a major portion of this air through fans to accelerate the air flow, next heating the air in an elongate plenum, through which the air passes, by directing high intensity flame angularly into the air flow from the periphery of the elongate section, thus creating agitation within the air flow to create uniformity of temperature therethroughout prior to directing the heated, thoroughly mixed air back into the wallboard drying section, at an end of the section opposite to the end from which it was originally removed.

Abstract: This invention relates to a U-fired soaking pit in which an auxiliary burner 4, e.g. a tunnel burner, is located below the main burner 3 to supplement the heat flow and heat transfer therefrom. The auxiliary burner is mounted between twin exhaust flue 5,6 and is vertically in line with the main burner, the main and auxiliary burners being disposed equi-distantly from one another and from the top and bottom of the furnace, respectively.