Abstract: A cylindrical chamber has a drive shaft rotatably mounted therein and extending along substantially the entire longitudinal extent thereof. This drive shaft is rotatably driven by a motor at a speed of 1,500-10,000 rpm. Solid particles to be comminuted which may be of coal, limestone/dolomite, cement or lime are fed into the chamber. Pressurized air is fed into the bottom of the chamber. Uplifting pressure for driving the gas and particles upwardly in the chamber may be provided by pressurized gas fed in through a tangential inlet in conjunction with a stationary velocity head. The upwardly driven particles are first driven through a plurality of short arm rotors which are driven by the shaft and provide a centrifugal force which comminutes the particles. The particles are then driven through a plurality of semi-permeable screens which are rotatably driven by the shaft and further comminute the particles. High apex flow enhancers are installed along the walls of the chamber to enhance the fluid flow.

Abstract: A gaseous fuel injector for an internal combustion engine or a propulsion system using fuel cells has an electromagnetic solenoid with a flat rectangular armature which seats against a seat member to form a valve. The valve is kept in a closed position by the differential between the fuel pressure on one side and the atmospheric pressure or the ambient pressure in the discharge chamber on the other side with additional closing force being provided by a spring which abuts against the armature. With each pulsating actuation of the coil of the solenoid, the armature is driven away from its seat to open the valve formed thereby providing an injection of gas from the injector. The injector has a discharge nozzle which is integrally formed therewith. A centrally located aperture is formed in the armature which along with the side space afforded by the rectangular shape of the armature provides dual apertures for the flow of gas through the injector.

Abstract: A guided bomb is provided with a central hardback section having a pair of extensible wings pivotally attached thereto. The hardback section is attached to the bomb by a saddle member. After launch of the bomb from the aircraft, the wings are extended by means of an electric motor and gear train to provide the lift necessary for gliding flight. One or more ailerons are provided on the trailing edges of the wings to enable control of the flight, these ailerons being controlled by the bomb's resident guidance system. The geometry of the wings, the hardback section and saddle member are designed so that the guided bomb units can be fitted within a restricted space on bomber aircraft rotary launchers.

Abstract: A cylindrical chamber has a drive shaft rotatably mounted therein and extending along substantially the entire longitudinal extent thereof. This drive shaft is rotatably driven by a motor preferably at a speed of about 3600 rpm. Solid particles to be comminuted which may be of coal, limestone/dolomite, or hydrated lime are fed into the chamber. Pressurized air is fed into the bottom of the chamber. Uplifting pressure for driving the air and particles upwardly in the chamber may be provided by pressurized gas in conjunction with a stationary velocity head. The upwardly driven particles are first driven through a plurality of rotors which are driven by the shaft and provide a centrifugal force which comminutes the particles. The particles are then driven through a plurality of semi-permeable screens which are rotatably driven by the shaft and further comminute the particles to a micronized state. To lower NO.sub.x and SO.sub.

Abstract: An antenna dish for reflecting signals for a first antenna operating in a first frequency band is mounted in proximity to a second antenna operating in a second frequency band separated from the first band. With the two antennas in certain relative orientations, the dish is partially or totally in the receiving and transmitting path of the second antenna. The dish is modified so that signals in the first frequency band can effectively pass through the dish. This end result is achieved by placing conductive antenna elements over the entire reflecting surface, these elements being dimensioned to efficiently radiate and receive signals in the first frequency band, thereby permitting such signals to effectively pass through the reflector dish.

Abstract: An optical reflector antenna utilizes a subreflector that is offset from the optical axis of the antenna and that revolves about the optical axis to scan the beam from the antenna in a circular path about the axis of the antenna to facilitate the search for and acquisition of a satellite for subsequent tracking and communications. The subreflector is mounted on a rotatable shaft that is aligned with the optical axis of the antenna. When the shaft is not being rotated, one or more springs hold the subreflector in a fixed position aligned with the optical axis of the antenna to facilitate tracking and communications. When the shaft is rotated, rotational forces cause the subreflector to shift to and remain at a position that is offset from the optical axis and the rotation of the shaft causes the offset subreflector to revolve about the optical axis of the antenna, thus scanning the beam from the antenna to facilitate the search for and and the acquisition of the satellite.

Abstract: A beam assembly is formed from a hollow beam member which has a pair of slidable channel units installed therein and extend from the opposite ends thereof. The ends of the channel units have guide shoes forming latching assemblies pivotally supported thereon, each guide shoe having a spring loaded lock key mounted pivotally mounted thereon. A pair of tracks are spaced from each other in opposing relationship by a distance equal to the longitudinal extent of the beam member. The tracks have a plurality of aligned apertures and C-shaped runners running along their longitudinal extent. The lock keys of the beam member each has a pair of fingers extending therefrom which fit into a pair of adjacent track apertures. The fingers may be locked in place in the opposing track apertures by the spring action of their associated springs and may be withdrawn from the apertures by way of a tab formed thereon.

Abstract: A chamber has a drive shaft rotatably mounted therein and extending along substantially the entire longitudinal extent of the chamber. This drive shaft is rotatably driven by a motor at a speed of 1,200-10,000 rpm. A plurality of screens having a mesh of 6-10 mesh are spaced from each other along the longitudinal extent of the chamber in opposing relationship and attached to the drive shaft for rotation therewith. Above the screens are a pair of discs which are attached to the shaft for rotation therewith and longitudinally spaced from each other. First and second similar plates having circular apertures formed therein are fixedly attached to the chamber in longitudinally spaced relationship, the first and second discs being positioned in the apertures of said first and second plates respectively. Gas to be purified is fed into the bottom of the chamber and driven upwardly by a compressor fan attached to the drive shaft.

Abstract: A device for driving a stepper motor in variable sized micro-steps in response to slew rate commands. The device integrates the slew rate commands, calculates the currents to be supplied to the windings of the stepper motor and supplies these currents to the stepper motor. The device utilizes an update frequency for the integration, calculation and supply of currents to the stepper motor that is higher than the frequencies of the predominant resonances of whatever system is being driven by the stepper motor. As a consequence, the size of each micro-step executed by the stepper motor in response to slew rate commands is larger for high slew rates and smaller for low slew rates.

Abstract: The controls for controlling the supply of natural gas fuel for a vehicle are integrated together in a module which is located at the gas tank. Such controls include a high pressure regulator for lowering the pressure of the gas flowing from the tank and an electronically controlled solenoid valve which shuts off the gas flow when no fuel is required by the engine and when the gas pressure in the tank falls below a predetermined value. Also included in the module are a pressure sensor for providing signals for controlling the shutoff valve; a check valve which permits one way flow of gas into the gas tank when it is filled; a pressure relief mechanism responsive to the temperature and pressure sensors for allowing safe release of the gas to the outside should the temperature rise above a predetermined limit.

Abstract: A mixture of gaseous fuel (natural gas or propane) and gasoline is used to fuel the internal combustion engine of a motor vehicle. The ratio of gaseous fuel to gasoline is preadjusted by the manual settings of an electronic processor which is used to change the gasoline fuel injection rate and the manual settings of an air/vacuum balance valve connected to a low pressure regulator and mixer are used to regulate the pressure of the gaseous fuel and mix it with air to provide the desired ratio. The fuel injection is also controlled in response to a signal fed to the processor which is in accordance with the output of the vehicle's exhaust oxygen sensors. The flow rate of gaseous fuel to the engine is controlled by means of a mixer which is preadjusted for a desired flow rate. This flow rate is automatically varied in response to the intake manifold pressure of the engine. This manifold pressure drives a valve which controls the gaseous fuel flow rate.

Abstract: The experience of parachute flight is simulated including parachute release and malfunctions. The parachutist trainee is suspended in a harness and a control line provided for the parachutist to operate. The parachutist's actions are sensed by an action sensor actuated by the control line. Force and position sensors sense position and force factors effected by the parachutist. The parachutist's head motion can be tracked by a head mounted sensor. The outputs of the sensors are converted to digital signals which are fed to a computer. The computer is programmed with a mathematical and logical model of parachute dynamics and environmental factors. The computational results are displayed to the parachutist on a monitor or on a head mounted display, the scene viewed containing a variety of three dimensional representations of objects on the ground such as buildings vegetation roads, etc.

Abstract: A filter assembly for use in filtering air in a dust collecting system has a pleated conical filter element which is mounted within a pleated cylindrical filter element. The cylindrical filter element is attached at one end to a base member and at the other end to a top member. The base portion of the conical element is attached to the base member. The apex of the conical member is closed off by a brace which has brackets thereon for supporting the conical member on the inner wall of the cylindrical member. Air to be cleaned is flowed into an aperture formed in the base portion and flows into the inner portion of the conical element with various portions of the air flowing through the filter walls of the conical element into the space between such walls and the cylindrical element. Air to be cleaned is also fed through the side portion of the cylindrical element into the space between the conical element and he cylindrical element with the filtered air being fed out through an aperture in the top member.

Abstract: A container has an upper fluid receiving portion and a lower fluid discharge portion which is closed off at its bottom by a closure. In carrying out the method of the invention, a blood sampling from the umbilical cord of a newly born infant is taken by first clamping off a section of the cord. The clamped section is then separated from the main portion of the cord and deposited into the container. One of the clamps is then removed to permit the blood in the cord section to drain into the container. The drained blood is then transferred to a second container, which may comprise a test tube or syringe, through the fluid discharge portion of the container, this being achieved by either causing a needle attached to the container and sealed with a needle cover to penetrate the needle cover as well as the test tube cover, penetrating the closure with a needle if it be a diaphragm or the like or opening a valve at such closure by a mechanical actuation with the nose of a syringe.

Abstract: Semi-permeable screens are installed in a pulverized coal burning boiler and rotatably driven by a high speed rotatable shaft. A first one of the screens is located above the main combustion zone of the boiler and a second one of the screens is located directly under the burnout zone of the boiler. The underside of the first rotating screen repels the larger and slower burning fuel particles that escape from the main combustion zone so that they are recycled for a complete burn-out. The smaller glowing particles suspended in the combustion gases pass through the first rotating screen and are micronized by the comminution effected by the spiral vortexes generated above this first screen. The second rotating screen positioned under the burnout zone provides for mixing and comminution of the gases and burning coal particles respectively. The vortexes generated by the screens homogenize the heat distribution in the upwardly moving stream of gas and solid particulates.

Abstract: A dual fuel injector for an engine is selectively controlled to either inject a liquid fuel such as gasoline or a gaseous fuel such as butane or propane to the engine. The injection of one fuel or the other is effected by alternatively feeding a pulsating voltage of one polarity or he other to the coil of an electrically controlled injector. The injector has a permanent magnet armature which is driven in one direction in response to pulses fed to its surrounding coil of one polarity and the opposite direction in response to pulses fed to the coil of the other polarity. When the armature is driven in a first direction, it drives a pintle attached thereto in that direction. The pintle in turn drives against a spring urged valve to open this valve, thereby permitting gasoline to pass through the control injector from where it is injected into the engine in a pulsating manner.

Abstract: One or more support rods made of a non-magnetic material have magnets mounted thereon, the magnets being placed with their north-south pole axes perpendicular to the longitudinal axes of the rods and with the north-south axes of magnets of adjacent rods normal to each other. The bottom end of the rod or rod assembly is connected through a flexible sleeve, which may be of rubber, to a support. The sleeve acts as a universal joint permitting freedom of movement of the rod and magnet assembly sideways. The rod swings back and forth sideways in response to the wind and other forces thereby creating a variable magnetic field which tends to repel birds, keeping them from flying into the immediate area and/or nesting in such area.