Abstract: A resonant microwave isolator is described in which a diagonal slot is fod in the top conductor of a microstrip, a strip of ferromagnetic material is mounted over at least a portion of the slot and magnetic flux is established in the ferromagnetic material in a direction intersecting the slot.

Abstract: A low-drag supersonic tubular projectile with self-contained thrust augmetion and capable of simultaneous dual internal air flows. One is a centrally located supersonic flow for providing low-drag characteristics, and the other a subsonic flow annularly arranged about the supersonic flow path, comprising a ramjet structure with solid fuel for deriving thrust augmentation enabling the projectile to achieve a terminal velocity which is substantially the same as or exceeding muzzle velocity.

Abstract: A flexible wing which is connected to a submunition provides a substantia vertical descent and provides torque which power submunition electronics. The flexible wing is deployed in a low drag configuration to avoid collision with other submunitions. The flexible wing is canted to allow rotation of the wing.

Abstract: An aircraft landing gear system including a window shaped type membrane wh is mechanically stretched prior to landing. The large surface area of the membrane would significantly increase the load bearing area of the helicopter, enabling landing in snow. Upon takeoff, the member would be rolled up.

Abstract: A spectroscopy characterization module having a particular configuration includes a light tight housing that accepts monochromatic radiation through a first optical port and optically chopped coherent radiation through a second optical port. A material sample is held on a sample mount within the housing according to the spectroscopy characterization technique to be used. A rotatable detector mount enclosed within the housing positions a detector in different positions depending on the measurement being performed. A first one-to-one image forming mirror focuses monochromatic radiation passing through the first optical port onto the material sample. A lens focuses optically chopped radiation passing through the second optical port onto the material sample. A second one-to-one image forming mirror focuses radiation transmitted through the sample onto the detector in a first position while a third one-to-one image forming mirror focuses radiation reflected off the sample onto the detector in a second position.

Abstract: The black hole which a cryogenically-cooled infrared (thermal) detector ctes in a scene being observed by another such detector is obscured by inserting a partial transmitter-reflector on the optical axis of the detector. A black-body radiator projects an ambient-temperature image the same size and shape as the black hole onto the transmitter-reflector such that the other detector sees a combined image with no apparent black hole.

Abstract: Van Atta array is used to receive a millimeter wave beam from a beam transmitter located in a missile in flight and retransmit the beam back to its source along its original optical path after the beam is phase conjugated and modulated at a tracking station by imparting to it missile guidance information. The missile extracts guidance information from the retransmitted beam and guides its trajectory closer to the course leading to the target.

Abstract: A hollow cylindrical flux source (HCFS) is formed into a toroidal shape. A hollow toroidal of magnetically neutral material is mounted in the central cavity of the toroidal flux source. The hollow toroidal has a central coaxial toroidal cavity of given cross-section (e.g., rectangular). The toroid flux source and the hollow toroid are each equatorially split into two halves. When the two halves are brought into juxtaposition and a suspension of magnetic material is deposited in the coaxial toroidal cavity a permanent magnet toroidal ring will be fabricated.

Abstract: A pattern of electrodes, with electrical lead lines to the electrodes, are arried by a thin-film membrane mounted on a frame. The pattern corresponds to a test point pattern on a circuit to be tested. The lead lines go to edge connectors on the frame. In order to test a circuit, the membrane is pushed against the test points by air pressure, such that capacitive coupling occurs between the electrodes and the test points.

Abstract: A pattern of electrodes, with electrical lead lines to the electrodes, are arried by a thin-film membrane mounted on a frame. The pattern corresponds to a test point pattern on a circuit to be tested. The lead lines go to edge connectors on the frame. In order to test a circuit, the membrane is pushed against the test points by air pressure, such that capacitive coupling occurs between the electrodes and the test points.

Abstract: A kinetic energy projectile intended to be launched toward a selected tar has a projectile body and a plurality of main fins attached to the projectile body to provide stability thereto in flight. A spoiler fin is attached to the projectile body ahead of each associated main fin for reducing the temperature of the main fins during flight of the projectile, and thereby, the burning of the fins in flight. The spoiler fin is adapted and configured to provide the temperature reduction by changing the aerodynamic flow over the edges and surfaces of the associated main fin, and also may be composed of material having a lower coefficient of heat conduction than that of the main fin. A gap of predetermined width is provided between the trailing edge of the spoiler fin and the leading edge of the associated main fin, this width being selected to create recirculating vortices behind the trailing edge of the spoiler fin sufficient to cool the leading edge of the associated main fin.

Abstract: Non-linear optical materials, i.e., those optical materials whose indices refraction depend on input radiation intensity, are few and of low non-linearities; this invention uses various metallic patterns on a transparent substrate, with non-linear elements between parts of the patterns, to function as an artificial dielectric. These elements may take the form of metal-oxide-metal tunnel diodes, Schottky diodes, p-n junction diodes, superlattice structures, and non-linear capacitors.

Abstract: A plurality of acoustic charge transport (ACT) tapped delay lines are coupled to respective antenna elements of a phased array antenna assembly to control the beam steering of either a transmitted or received electromagnetic wave in the megahertz (MHz) range. Each delay line, moreover, is comprised of an ACT channel region which operates as a delay line and further includes multiple signal output taps which can be selectively addressed from an address bus coupled to a digital controller for providing a predetermined delay. With each delay line being individually controlled, an improved technique for beam steering is provided.

Abstract: An encapsulated actuator for testing specimens includes a housing contain a wall defining first and second chambers. The specimen under test is arranged in one of the chambers and vent holes are provided in the wall in order to equalize the pressure within the chambers. An actuator is arranged in the second chamber for generating a mechanical force and a force transmitting device is connected between the actuator and the specimen. The force transmitting device passes through an opening in the housing wall and transmits the mechanical force from the actuator to the specimen. Because the actuator is encapsulated within the housing, it is subjected to the same confining pressure as the specimen.

Abstract: A short scan passive infrared remote sensor for detecting a target chemical pecies, located some distance from the center burst, includes a telescope for targeting a remote gas, a beam splitter means for splitting a beam from the target gas and sending one portion along a first path to an infrared detector and sending a second portion along a second path longer than the first path to the infrared detector. The second path is variable by providing a moving mirror a first distance away from the beam splitter which is 0.5 mm farther away from the beam splitter than the fixed mirror. By this arrangement, a mirror movement of only 0.5 mm is required to obtain an equivalent of 8 cm.sup.-1 spectral information for processing with time domain digital filters. The information from the infrared detector is converted from analog to digital and fed to a digital signal processor. The resulting interferogram is then filtered by a microprocessor using a FIR linear digital filter.

Abstract: A novel falling cylinder extensional rheometer is provided for measuring elongational viscosity of a polymeric solution at stretch rates comparable to those associated with aerodynamic liquid breakup and which is suitable with toxic liquids. The rheometer consists of an upper cylinder and a lower cylinder, both vertically arranged or oriented and having their longitudinal axes coincidental. A small quantity of liquid is inserted between the end of the two cylinders that are vertically spaced one above the other. The upper cylinder is held fixed while the lower cylinder rests initially on top of an air cylinder piston. When the piston is activated, it quickly retracts downwardly allowing the lower cylinder to fall and stretch the liquid sample adhering between the ends of the upper and lower cylinders. A high speed camera is used to photograph the falling lower cylinder and the ligament stretching.

Abstract: The invention disclosed herein is a battery cell compartment which is use in limiting the number of batteries in any battery cell matrix. The battery cell compartment permits the use of relatively few batteries for practically any power need. The battery cell compartment essentially comprises a housing for a plurality of battery cells; a door panel; a series of concentric springs attached to the door panel and positioned such that when the door panel is secured to the housing the concentric springs are aligned with battery cell berths in the housing; circuit power pins electrically connected to the concentric springs; a diode, a thermal fuse and a current fuse placed in series with the circuit power pins.

Abstract: A narrow, high energy, electron beam is caused to impinge upon an integra circuit. The accelerating voltage of the electron beam is increased until the electrons have just enough energy to penetrate through the thickness of the passivation layer of the integrated circuit. The accelerating voltage is then increased a predetermined amount (3-5 KeV) above the voltage required for passivation layer penetration. The transmitted electrons interact with the sublayer of thin film material and generate distinct X-rays. The increased-intensity electron beam is x/y or raster scanned over the area of interest of the integrated circuit. The X-ray intensities generated during the raster scan are detected and stored. After a complete scan of the area of interest, the X-ray intensities are read, processed through a formula that compensates for absorption effects, and visually displayed.

Abstract: Current state of the art air core homopolar generators employ large time ying magnetic fields (4 Tesla Range). These high fields are required for proper voltage, but also induce significant eddy currents. Use of novel transposed rotor conductors and a novel transposed coil winding reduces these currents to acceptable levels. Furthermore use of a segmented stator current collection system further reduces the flow of eddy currents.

Abstract: A device is disclosed which uses permanent magnets to manipulate charged ticle beams, such as those employed in traveling wave tubes, wigglers, and undulators. Tapered pole pieces are inserted between magnets in a periodic permanent magnet array, and the taper is oriented away from the beam path. The magnets themselves may also be tapered, but the taper is oriented toward the beam path. Tapering is described according to the cross sections formed when the plane which contains the beam path intersects the magnets and pole pieces.