Abstract: An optical material having an index of refraction related to wavelength is placed between the reflectors of a Fabry-Perot cavity employed as an interference filter. The cavity is skewed with respect to the optical path of incident radiation such that the material diverts the optical paths of different spectral lines and the filter response more nearly matches the line spectrum.

Abstract: An optical material having an index of refraction dependent on wavelength of incident radiation is used between the reflectors of an off-normal Fabry-Perot cavity used as an interference filter. External to the cavity, and in the direction of incident radiation, another optical material having an index of refraction dependent on wavelength of radiation is placed. The incident radiation is thus refracted into and within the cavity dependent on its wavelength. By proper choice of the indices of refraction, and other variables, the filter may be designed to exactly match the output spectrum of a line spectrum laser, and to transmit all spectral lines of the laser, but to reflect all other radiation of interest.

Abstract: The missile system disclosed herein involves directing a beam from a modeely powered laser on a taget for such time that a hot spot is produced. This hot spot is then used as a target for a cooperating infrared seeking missile.

Abstract: An annular resilient band structure designed for installation on a ground hicle to provide tractive propulsion force and vehicle suspension force. Resilient suspension function is achieved by an annular resilient leaf spring core encapsulated within an elastomeric sheath. Load transfer between the ground or vehicle and the band structure is obtained by plies or cords trained along the surfaces of the core between non-extensible beads at opposite side edges of the band structure. Propulsion capability is achieved by metallic drive shoes rivetted onto edge areas of the elastomeric sheath.

Abstract: Apparatus for a beamrider missile guidance system in which a rotating rete wheel with a predetermined pattern of opaque and transparent segments is used to spatially encode a projected beam of electromagnetic radiation with the projected spatial information being used as a tone burst code with the frequency of the tone being proportional to missile position and the projected information being projected in two axes with appropriate timing of the burst for axis recognition.

Abstract: Disclosed is a single chamber ultra-high vacuum processing system for the oduction of hermetically sealed quartz resonators wherein electrode metallization and sealing are carried out along with cleaning and bake-out without any air exposure between the processing steps. The system includes a common vacuum chamber in which is located a rotatable wheel-like member which is adapted to move a plurality of individual component sets of a flat pack resonator unit past discretely located processing stations in said chamber whereupon electrode deposition takes place followed by the placement of ceramic covers over a frame containing a resonator element and then to a sealing stage where a pair of hydraulic rams including heating elements effect a metallized bonding of the covers to the frame.

Abstract: Manufactures, apparatus and processes for shielding the hazards of exploss, pyrotechnics and propellants during manufacture, demolition, demilitarization storage, transportation and use.

Abstract: Water-soluble protein is coated onto particles of nitramines by making a rry of nitramine powder in a water solution of the protein and removing the water by evaporation or by filtration after previously precipitating the protein by addition of ethanol. The protein coating acts as a bonding agent to enhance the bond strength between propellant binders and the nitramine particles, resulting in substantial enhancement of desirable propellant properties.

Abstract: A method and apparatus for eliminating the sidelobe ambiguity in the range esponse of an FM-CW radar. An FM-CW signal with a periodic modulation frequency is transmitted and reflected from a target, received and combined with a sample of the transmitted signal to provide a combination signal. A portion of this combination signal including a selected harmonic and next adjacent harmonic is amplified and mixed with reference signals comprising the selected harmonic and next adjacent harmonic to provide two separate difference signals. These signals are in turn low pass filtered and further mixed to provide a range response with a mainlobe of one polarity and all side lobes of an opposite polarity. The energy under the mainlobe is detected and integrated to provide a voltage signal. When this voltage signal reaches a preset threshold level a further signal is generated.

Abstract: A line source antenna adapted for a light weight, compact phased array radar and consisting of a plurality of radiating slots periodically located in one side wall of a length of waveguide, having a single monolithic ferrite phase shifter in the form of a long continuous toroid extending the length of all of the slots.

Abstract: A military tank having a turret, a gun mounted in the forward portion of turret, and ammunition storage magazines in the rear portion of the turret. A loader is arranged within the turret in alignment with the gun to transfer individual rounds of ammunition from the magazine area into the gun. The arrangement provides a compact storage system capable of storing a relatively large number of rounds in a given height turret.

Abstract: This invention relates to the correction of the orientation angle or angle of cut of quartz crystal blanks which substantially eliminates the initial formation of mesas and the subsequent lapping operation, as heretofore required, by providing a controlled linear etching gradient across opposing faces of a crystal plate or blank which is to be corrected. A beam for either ion etching or photolytic etching is repeatedly scanned across the face of the crystal plate in a multi-line raster pattern under the control of a microprocessor or mini-computer which controls the contour of the face being etched. X-ray apparatus monitors the etching and feeds information back to the computing apparatus for providing a closed loop control. The scanning includes either intensity modulation or velocity modulation of the beam, or succeeding scan lines are repetitively scanned a greater number of times than the respective preceding lines causing increasing amounts of the surface to be eroded as the scanning operation proceeds.

Abstract: The angle of cut of a quartz resonator blank is corrected by a photolytic etching technique whereby an intensity gradient of photon energy is developed across the surface crystal blank which is to be corrected. The intensity gradient is generated by means of a lens system located intermediate a photon source and the crystal blank, the surface of which has been treated with a photolytic etchant. The lens system includes at least one lens having a region of variable transmissivity of photon energy so that the amount of photon energy impinging on the crystal determines the depth of surface erosion. Additionally, the etching operation is controlled by means of a programmed digital computer which controls the contour of the face being etched upon receiving feedback information from X-ray apparatus which examines and monitors the etching for providing closed-loop control.

Abstract: The invention discloses an apparatus for the radial inertia welding of a al band to the outer surface of a cylindrical metallic structure. The metals may be similar or dissimilar. The band is placed on the inside of a spinning collet and as the cylindrical structure is advanced thru the band, at a predetermined position, it activates the collet jaws, causing the band to be radially compressed onto the cylindrical structure. Friction between the rotating band and the cylindrical structure held by a tailstock creates heat and under the resulting collet jaw pressure welding action results.

Abstract: A microwave switching device replacing PIN diodes and operating at higher eeds requires reduced switching current. A field effect controlled device is utilized with no ground plane, for elimination of source-ground and drain-ground capacitance. Massive source and drain structures reduce terminal inductance. A low resistance active region provides dynamic switching capability improving over prior art devices in operating frequencies and speeds.

Abstract: A propellant grain for improved ballistic performance of guns, the grain prising a cylinder of generally hexagonal cross-section being provided with a plurality of perforations, preferably 37, passing therethrough. The perforations are disposed such that the interstitial distance between adjacent perforations is substantially equal and the extrastitial distance between peripheral perforations and the surface of the outer wall is substantially equal to the aforesaid interstitial distance. The novel shape of the solid propellant grain improves ignition and burning characteristics such that higher average pressures are maintained during projectile acceleration without increasing the maximum pressure within the gun barrel.

Abstract: Apparatus for centering the aft end of a missile in a telescoping launch e including equally spaced bore rider members bonded in the detent groove of a missile at the aft end of the missile. Each bore rider member includes upper and lower portions having a notch therebetween. The bore rider shears at the notch as the rider impacts the inner launch tube ramp. The remaining base is retained in the detent groove and centers the missile in the smaller launch tube as the missile moves along the smaller tube.

Abstract: A wedge-shaped seal for sealing against leakage of gun gases past a projele in the bore of a gun barrel includes a wedge-shaped tip having rearward angled forward and rear surfaces which is preloaded to bear the tip against the projectile body. A wedge-shaped region between the lip and the projectile body is partly collapsed by the pressure of gun gases on the rear surface of the lip to improve the seal. A similar seal may be provided with the bore of the gun barrel.

Abstract: A missile disposed for launching from a telescoping launcher having inner d outer sections. The missile is provided with fins folded along the body. A resilient spring clip member is carried on each said fin and engages the inner surfaces of the launcher sections as the missile traverses the launcher to retain the fins in folded position in the launcher.

Abstract: An electrical harness interface system including a circuit board (either id or flexible) having one or more electronic modules adapted to be removably secured thereto with each of the modules having a plurality of connectors. An input/output connector and a matrix connector are also provided on the circuit board. The circuit board further includes a plurality of electrical conductors (or traces) interconnecting the electronic modules, the matrix connector, and the input/output connector. The system permits one or more of the electronic modules to be removed and to be replaced with another electronic module having a different electrical function (or logic) and requiring a different electrical connection to the conductors in the circuit board and/or to the input/output connector. This system comprises a plurality of spare connectors for each of the electronic modules and a plurality of spare electrical conductors in the circuit board.