Abstract: A system for attaching the pilot chute to the crown area of a main parachute having a parachute vent pull down apparatus including a thong-disc assembly and a crown line assembly secured to the pilot chute bridle. The pilot chute bridle is connected between the pilot chute and a position on the main parachute canopy adjacent the crown area. The pilot chute bridle and six crown lines are equally spaced around the crown area of the canopy. Each of the six crown lines includes a loop at their free ends. The thong-disc assembly includes six fabric thongs equally spaced together with the bridle around a circular disc. The crown line assembly includes seven panels with the pilot chute bridle line being secured along the junction of two panels and webbing member secured along other junction lines between panels. Pilot chute bridle attachment loops are connected to the webbing members and pass through a loop on the bridle.

Abstract: An adjustable fluid flow and spray control for use in conjunction with a manifold. The rate of flow of a fluid, and the rate of spraying of the fluid, are controlled by moving a pintle, instead of further deforming the manifold, as is conventionally done.

Abstract: A surface acoustic wave electromagnetic transducer (SAW EMT) having a meander line with progressively smaller spacing between conductors produces a surface, acoustic, traveling, exploratory, output signal that is greatly dispersed, when excited with a pulse electrical signal; and a corresponding compressed electrical output signal is produced from a received acoustic signal. The transducer may be used either to transmit or receive signals.

Abstract: This invention relates to a novel railway vehicle brake apparatus that comprises a brake cylinder device having two tandem-connected pistons of unequal size, the larger of which is provided with a check valve and cooperates with a hollow cylindrical body in which it is slidably disposed to form on its respective opposite sides two fluid pressure storage reservoirs wherein is stored fluid under pressure for effecting a brake application. This brake apparatus further comprises a novel brake control valve device that is so responsive to a reduction of pressure in a train brake pipe as to first cause simultaneous shifting of both pistons in a brake-applying direction and a transfer of fluid under pressure from one side of the larger piston to the other until a chosen braking force is transmitted through brake rigging to press brake shoes against the wheels of a vehicle.

Abstract: This invention relates to an improvement in a process for treating a flue gas with a spiking gas containing sulfur trioxide. In this process, the concentration of sulfur trioxide in the spiking gas is maintained in a proportion of from about 0.15 to 1.2 mol percent, and the temperature of the spiking gas is maintained such that during any stage of mixing of the spiking gas with the flue gas, the resulting temperature of the mixture is not more than 10.degree. C below the dew point, the dew point being determined by equation.

Abstract: A manually operated tool for relieving material on a 360.degree. staked aircraft bearing by performing an accurate concentric cut at a controlled feed rate with a nominal cutting force. Three equally spaced cutting blades stabilize the cutter assembly while an integral timing and blade calibration component also serves as a retention collar. The staked grooves of the bearing race provide for concentric positioning of the cutter instead of the bore of the bearing thereby preventing possible damages.

Abstract: This invention relates to an anesthesia dispensing device which comprises a turntable for carrying a plurality of vaporizers having an inlet and outlet port for each vaporizer, and a manifold having a feed port and an exhaust port with a passageway capable of providing communication between the feed port and an external gas supply and a passageway capable of providing communication between the exhaust port and the exterior of the dispensing device. The turntable and manifold are supported for relative rotational and reciprocal movement so that a vaporizer can be rotated into position, engaged and disengaged by simple manipulation.

Abstract: A method for forming tellurium N-type layers in gallium arsenide by using ion implantation as the doping process and aluminum nitride as a protective overcoat to prevent disassociation of the gallium arsenide during anneal.

Abstract: This invention relates to a mattress to which conditioned air can be supplied to issue from the mattress to impinge upon and pass around the body of a person so as to wholly or partly enclose the person in a microclimate to promote healing or maintain the health of the person. A supply of conditioned air to a person can be of great assistance in the prevention of bed sores and can greatly encourage the healing of burns. Further the provision of a supply of warm air to, say, an elderly person at home during sleeping can be of great assistance in the prevention of hypothermia.

Abstract: A two stage remotely actuated structural latch especially suitable for supporting an aircraft canopy during flight as well as on the ground. One single part of the latch carries all of the load and the latch can be locked or unlocked from a remote location by use of a rod, cable or tube to acruate only non-structurally loaded pins and links which have high mechanical advantage in the first stage unlocking movement. This arrangement permits emergency canopy release during flight by the application of average human leverage and provides maximum pull up capability at the time of maximum mechanical advantage. A self-aligning and floating hook pin concept eliminates the need for hook and mating pin alignment.

Abstract: A passive target array, for measuring the resolution of infrared reconnaissance sets, having a heat retaining background pad. A plurality of perforated aluminum strips are laid on the pad in a conventional photographic resolution target configuration.

Abstract: A vapor recovery system in which gasoline vapors or other flammable vapors are withdrawn from the vicinity of a like, and are disposed of by combustion in a burner system, preferably consisting of two burners selectively usable for burning vapor-air mixtures of different B.T.U. contents. The vapors may be temporarily stored by adsorption onto an adsorbing substance, and then be removed from that substance by conducting a flow of air therepast.

Abstract: A supersonic diffuser having a plurality of blades therein for dividing the diffuser channel into a plurality of approximately axisymmetric ducts wherein a portion of said ducts ingest a boundary layer along at least one of the walls of the supersonic diffuser. The blades in the diffuser channel have their upstream ends bent away from the wall having the boundary layer to redirect the flow into the ducts. In one embodiment the wall between the duct having the boundary layer and the duct adjacent to the duct having the boundary layer is made in two sections with both sections being bent away from the wall having the boundary layer, to provide internal redistribution between the two ducts.

Abstract: The means and method for the cleaning and self-cleaning of an electrostatic precipitator is especially suited for adaptation to an electronic air cleaner comprised of an ionizer unit and a collecting cell unit adapted to be included in tandem within a suitable cabinet; means to bring air to be cleaned through these units are also provided, and these may or may not be an integral part of the cleaner. The ionizer unit may include support members for a plurality of ground plates between which are located ionizing wires which normally carry a low current but high voltage, preferably in the neighborhood of 10,000 to 14,000 volts. (Some electronic air cleaners, however, use voltages in the 5,000 to 9,000 volts range. This invention will also work effectively with them.

Abstract: At the outlet of the duct for the powdery material is provided a movable diaphragm where orifice is adapted to engage a clearing fixed pin when the flow rate of said material reaches a predetermined low threshold. Said diaphragm is controlled by clearance actuating means comprising a pneumatic jack adapted to be supplied with compressed air through an electro-valve whose control input is connected to the output of a flow detector.

Abstract: A modified activated sludge system is provided wherein BOD-containing wastewater and recycled sludge are initially admixed under anaerobic conditions in the substantial absence of oxygen or oxidizing agents and subsequently subjected to aeration and clarification. By the disclosed operation the selective production of non-bulking biomass is favored while effective removal of phosphates is obtained. By a further alternative modification, nitrates and nitrites are also removed by interposing an anoxic treating zone between the anaerobic zone and the aerating zone.

Abstract: An improved tubular filter bag of two piece construction, one piece being coated with a flexible and abrasive resistant coating, the coated piece being in communication with a flow-through inlet for absorbing the impact of the bag during cleaning. Also disposed at approximately the maximum impact point of the filter bag is a support member to restrict flexing of the bag during cleaning.

Abstract: A fail-safe symmetrical solid-state polarized relay circuit having a positive and a negative level detector coupled to a source of periodic input signals. A pair of amplifiers for amplifying the a.c. oscillations produced by the level detectors. A plurality of rectifiers for rectifying the a.c. oscillations and for alternately producing a d.c. output voltage on a pair of output terminals in accordance with the positive and negative excursions of the periodic input signals.

Abstract: A radio controlled remote brake system for a railway train having a caboose equipped with a motor driven pressure regulating valve device and an equalizing reservoir that is charged from the train brake pipe pressure via the regulating valve device. When a brake application is made at the locomotive by operating the conventional engineer's brake valve device, a radio signal corresponding to the brake valve position is transmitted to the caboose where it is compared with a feedback signal corresponding to the instantaneous position in which the caboose regulating valve is set by its drive motor. When the brake control and feedback signals match, the caboose regulating valve is set to effect a reduction of the caboose equalizing reservoir pressure in accordance with the locomotive equalizing reservoir pressure reduction resulting from operation of the engineer's brake valve device.

Abstract: A multi-zone heating-cooling system having a plurality of reversible cycle air heating and cooling units connected to a closed loop water circulation circuit, and at least one ventilating air tempering coil in liquid flow communication with the water flowing in the closed loop water circulation circuit and in heat exchange relationship with a stream of outdoor air such as might be used for ventilation.