Abstract: A system to warn an aircraft pilot of a hazardous wind shear condition in which the rate of change of airspeed is compared to the ability of the aircraft to respond thereto. Any difference therebetween that exceeds a predetermined threshold is used to activate a suitable alarm or compensation device. Additional refinements include correcting the inertial speed inputs for vertical components and autopilot induced throttle changes, and correcting the air speed inputs for short term fluctuations.

Abstract: A cleaning system for furnaces in which a cleaning fluid such as air is directed through nozzles in the furnace, exiting adjacent curved fluid attachment surfaces. The fluid follows the attachment surfaces and is thereby directed onto and across the dirty surfaces of the furnace to continuously scrub the soot therefrom.

Abstract: A cleaning system for furnace walls in which a cleaning fluid such as air is manifolded through numerous small slots in the furnace wall, exiting adjacent the curved surfaces of the heat exchange tubes. The fluid attaches to and follows the curved tube surfaces to continuously scrub the soot therefrom.

Abstract: There is disclosed a suction operated body fluid collection bottle having cylindrical portion terminating in a dome-shaped portion. An opening is positioned centrally with respect to said dome. The sides of the opening are arranged to accept a screw cap closure. The said closure has an upwardly standing nipple arranged to be attached to a suction conduit line and a second nipple arranged to be attached to a conduit terminating at the other end at a source of body fluids. The arrangement of the bottle is designed to aspirate the body fluids into the container without permitting the fluids to actually reach the suction line. In another embodiment the aperture has an insert container which extends downwardly into the container. The insert container is calibrated to receive accurately measurable, small quantities of body fluid collected within both the bottle and the insert. Such insert includes overflow means whereby quantities in excess of a predetermined amount can overflow into the interior of the bottle.