Abstract: A liquid fertilizer is produced from off-gassed ammonia resulting from the processing of animal waste materials, particular animal manure. The vaporized ammonia is generated primarily by heating the animal waste materials and capturing the resulting vapors and particulate materials. The ammonia vapors and particles are removed from the gas stream through a scrubbing operation, which creates an ammonium-enriched liquid stream that can be concentrated into an organic fertilizer having a high-nitrogen content.

Abstract: A liquid fertilizer is produced from off-gassed ammonia resulting from the processing of animal waste materials, particular animal manure. The vaporized ammonia is generated primarily by heating the animal waste materials and capturing the resulting vapors and particulate materials. The ammonia vapors and particles are removed from the gas stream through a scrubbing operation, which creates an ammonium-enriched liquid stream that can be concentrated into an organic fertilizer having a high-nitrogen content.

Abstract: The present invention relates to a system and method for allowing quality of an image to be tested. For example, the present invention may be utilized to test the quality of an image produced by a helmet-mounted display such as an Integrated Helmet and Display Sighting System (IHADSS). In at least one embodiment, after the image is captured by a camera, for example, at least one measurable aspect of the image is analyzed in an objective manner to determine at least one possible difference in the measurable aspect of the image and a corresponding measurable aspect of a recalled representation of the image and presenting the difference via a visual display device.

Abstract: A solar-powered, illuminated aircraft warning marker for connection to suspended cables and overhead transmission lines includes a polygonal housing having a plurality of light elements attached to different sides of the housing. The warning marker includes solar cells, storage batteries and electrical circuit apparatus for selectively illuminating the light elements during low ambient light and nighttime conditions.

Abstract: A process for the production of bis(fluoromethyl)ether by contacting formaldehyde with hydrogen fluoride in a reaction/distillation vessel. The reaction/distillation vessel is preferably a reaction/distillation column through which formaldehyde and hydrogen fluoride preferably flow in counter current.The bis(fluoromethyl)ether may be converted to difluoromethane, preferably by heating the bis(fluoromethyl)ether to elevated temperature in the presence of a metal, metal oxide, metal fluoride or metal oxyfluoride catalyst.

Abstract: A process for the production of bis(fluoromethyl)ether by contacting formaldehyde with hydrogen fluoride in a reaction/distillation vessel. The reaction/distillation vessel is preferably a reaction/distillation column through which formaldehyde and hydrogen fluoride preferably flow in counter current.The bis(fluoromethyl)ether may be converted to difluoromethane, preferably by heating the bis(fluoromethyl)ether to elevated temperature in the presence of a metal, metal oxide, metal fluoride or metal oxyfluoride catalyst.

Abstract: Each of two aircraft ejection seats, initially mounted in a side-by-side arrangement in an aircraft, has a primary rocket motor for accelerating the seat/airman combination on ejection, by producing a thrust vector substantially through the center of gravity of the combination, and having a substantial component along that axis of the seat/airman combination about which the combination is rotationally balanced, which lies closest to parallelism with the vertical center line of the airman. To ensure separation, upon ejection, between the two ejection seats, each has, in addition to its primary rocket motor, a lateral thrust rocket motor arranged to produce a transverse thrust vector which passes through said axis at a position spaced from said center of gravity, so as to produce a rotational moment acting on the combination, whereby the two seats are caused to move in respective arcs diverging from one another, but without spinning about said axis.

Abstract: An energy absorbing seat arrangement, particularly for a helicopter, in which a seat pan is carried by a frame slidably mounted on parallel upwardly extending pillars secured to the helicopter. In normal conditions, downward sliding of the frame on the pillars is prevented, in one embodiment, by metal rods fixed with respect to the pillars, and extending through drawing dies fixed with respect to the seat frame. In a variant the rods and dies are replaced by a deformable metal tube and a mandrel extending through the tube. In the event of a crash in which rapid downward movement of the helicopter and the pillars is halted suddenly, the seat and seat frame continue to move downwardly, sliding along the pillars, while drawing of the rods through the dies, or drawing of the mandrel through the deformable tube, to dissipate the kinetic energy of the seat and its occupant relatively gradually.

Abstract: An aircraft ejection seat system which incorporates means for permitting deployment of a main parachute at the end of a delay after ejection and a mode selector mechanism operable to permit such deployment at a shorter predetermined time after ejection if ejection takes place at low speed and low altitude. The mode selector mechanism incorporates a piston slidable along a bore to operate a firing pin to fire a cartridge and thus initiate the earlier deployment of the parachute. Means for sensing barometric pressure, air speed, and deceleration are arranged, if the sensed value indicates the longer delay period is required, to project respective plungers transversely into the bore to prevent the piston from striking the firing pin. A further plunger remains projected into the bore unless auxiliary sensing means positively senses low speed and altitude.