Abstract: In combination, a range having at least a first burner and a first burner control disposed on a horizontal surface. First and second spaced vertically disposed guide tracks are secured to the range proximate the first burner. A cover is operably connected to the range. The cover has a vertical orientation permitting access to the burner and the burner control, and a horizontal orientation covering the burner and the burner control for prohibiting access thereto. A handle extends from the cover for permitting the cover to be shifted between the orientations. First and second rollers are secured to an extend from the cover, and are each received in one of the guide tracks for guiding movement of the cover during shifting thereof between the orientations.

Abstract: A flash evaporator heater including a substrate formed of an intermetallic compound or of graphite and having an outer coating composed of pyrolytic boron nitride or pyrolytic graphite. The substrate has a substantially rectangular configuration with a substantially flat upper surface and a recessed cavity. The cavity has a longitudinal cross sectional geometry which forms a slope intersecting the substantially flat upper surface of the substrate at an angle .alpha. of less than 60 degrees.