Abstract: An altimeter (24) of the aneroid type having a correctable digitizer 26 is shown. When the pilot sets the altimeter to the local barometric pressure, the correctable digitizer is also set to the local barometric pressure. An input device (58) connected between the barometric pressure correction control (66) and the digitizer (62) generates a barometric pressure correction signal (67) which is routed to digitizer (62). Barometric pressure correction signal (67) modifies the aircraft altitude output value of digitizer (62) to a corrected aircraft altitude output value (68) which is routed to one or more external navigation systems (70).

Abstract: An improved folding burner apparatus which is characterized by three support legs, two of which legs are each provided with a compression leg fitting for pivotally mounting the support legs on a burner pipe in foldable relationship. Each of the leg fittings is further provided with a leg stop which contacts the burner pipe when the legs are deployed, to prevent the legs from folding excessively when the burner apparatus is oriented in functional configuration. The third leg is fixed to a leg collar which is rigidly attached to the burner pipe and serves to stabilize a gas inlet line which terminates inside the bottom area of the burner pipe.

Abstract: The invention disclosed herein relates to fireproof building panels for use in building structures and in adding to existing structures where it is desired to insulate the internal volume defined by the structure from a high outside ambient temperature. The building panel is comprised of a fiber insulating material placed against a metal screen. The outer perimeter of the fiber material and the metal frame is surrounded by a metallic channel.