Abstract: A high altitude reconnaissance platform is implemented by an ultralight aircraft powered solely by long wave infrared cells mounted on the lower surfaces of the wings and the fuselage. The aircraft may be of the pusher, slow speed propeller style, with a larger rear wing and a small, canard-type front wing. The bottom of the fuselage may be flat. The two wings may be vertically offset from one-another, and the cross-section of the wings may be relatively thick, with the ratio of the width of the wings to their thickness being in the order of about 6 to 8.

Abstract: A pusher turboprop engine is provided with an interior exhaust duct structure which directs the hot turbine gasses through and out of the engine nacelle to an annular duct mounted on the rear spinner which surrounds the propeller hub. The rotating annular duct includes blade-shaped shields which protect the roots of the propeller blades from the hot exhaust gasses and also pulls warmed cooling air through the engine nacelle thereby providing a rearwardly directed jet thrust to augment the propeller thrust.

Abstract: A cargo conveyor system (10) having a receiving platform (20) for receiving cargo containers (138) conveyed through a loading door (16) in an aircraft fuselage (14), and movable between a lower inclined position and a vertically raised, horizontally level position; a first roller platform (22) positioned at an upper horizontal level that is substantially coplanar with the vertically raised, horizontally level position, the first roller platform being adapted for lateral movement in the cargo hold (12) between a first position and a second position; and a second roller platform (24) vertically movable between an intermediate horizontal level position vertically below the first roller platform (22) and the upper horizontal level when the first roller platform (22) is in the second position. A lug (130) is contacted by the first roller platform (22) during lateral movement and moves a rod (128) to raise the second roller platform (24) to the upper horizontal level.

Abstract: A receptacle comprises a plurality of juxtaposed tanks interconnected adjacent upper portions thereof in liquid communication with each other by eyelets defining liquid transmitting passages. Each of the tanks has an open top closed by a funnel shaped cover having a central opening for admitting burning liquid fuel. Spheres are suspended from the covers to normally seal the liquid transmitting passages with the spheres each having a density which will permit them to float on the liquid fuel when it rises to the level of the passage to thereby open the passage.

Abstract: A vertical hydro-hoist for conveying a slurry under pressure by using a liquid obtained from a chemical process as a driving liquid and method for operating the same, the hydro-hoist includes at least one feed chamber and a detector for detecting a relationship of specific gravities between a driving liquid, a slurry and a float desporent in the at least one feed chamber. A holding member is provided for holding the float and a device, provided for supplying or discharging a specific gravity adjusting liquid into and out of the float. After temporarily holding the float in the feed chamber, the adjusting liquid is supplied into or discharged out of the float in accordance with the relationship detected by the detector.

Abstract: The invention is a propulsion system for a buoyant aircraft. The invention comprises a gas storage container filled with a lighter-than-air gas and having outer walls of which at least a portion thereof are flexible. A system is provided to move the flexible portions of the walls alternately inward and outward varying the internal volume of the container, thus, varying the buoyancy of the aircraft and providing a propulsive force. Air foils mounted on the aircraft are adapted to provide trimming forces as the aircraft descends and ascends.

Abstract: An airlock for the continuously feeding through of a material while obstructing the free flow of a gas is provided. The airlock comprises a first continuous belt having a plurality of nonporous flaps projecting out from it. Each flap has a free edge located outwardly from the belt. A second belt runs parallel to the first and has elements to seal against the free edges of the flaps of the first belt. A motor moves the belts so that their transport sides move together. Particulates are transported in the chambers formed by belts and flaps while the flow of air between and past the belts is inhibited.

Abstract: A hopper system comprising a hopper having a side wall sloping downwardly and radially inwardly from the inlet at the top of the hopper to the outlet at the bottom of the hopper. Secured to the inside of the hopper is a membrane having a shape generally conforming to the inside of the hopper and closely overlying the conical side wall of the hopper. The membrane is permeable to air but generally impermeable to fluent material in the hopper and has a plurality of pockets for receiving stay bars. The upper and lower cylindric ends of the membrane are clamped to clamping assemblies mounted on the inside of the hopper adjacent its upper and lower ends, respectively, without the use of fasteners extending through holes in the ends of the membrane or other means of attachment to the hopper. The clamping assemblies are removable from the hopper without first unclamping the membrane whereby the clamping assemblies and membrane may be readily installed in and removed from the hopper.

Abstract: A load carrying and releasing pendular device for attachment to a kite string and release the load on jerking on the kite string. The device is fixedly attached to the kite string at an upper location. The device is also releasably coupled to the kite string at a second lower location. The kite string is releasable from coupling to the device at the second location by jerking on the string of the kite. The device assumes a first raised position when it is coupled to the kite string both at the first upper location and at the second lower location. On jerking the kite string, the string becomes released at the second lower position and the device pivots from the first raised position to a second lower position. This pivoting of the device, providing movement of portions of the device, relative to the kite string causes the release of the load releasably carried by the device.