Abstract: A towbar assembly wherein two individual towbars are arranged in a V-configuration between a towing vehicle and a towed vehicle. The leading ends of the towbars have special end connectors that hook around a single towing pintle so that each towbar carries approximately the same tensile loading irrespective of changes in vehicle pitch or roll attitude. Each towbar is essentially independent of the other towbar, whereby the towbar loadings are essentially in the direction of the bar longitudinal axis; bending forces are to a great extent eliminated. The invention is designed primarily for use in towing large heavy vehicles weighing in excess of fifty tons.

Abstract: The high pressure furnace comprises a cylindrical pressure vessel with fr and rear pressure closures. An electrical heating element is supported within the interior of the pressure furnace. The front closure supports a relatively thin-walled inner container opening only to an aperture in the front closure. A small closure plugs the aperture. A reaction frame secures the various closures. Blanket gases are introduced into the furnace chamber and process gases into the process chamber defined by the interior of the inner container. Means are provided for minimizing the pressure difference across the inner container to enable it to maintain its original shape.

Abstract: An improved NF.sub.4.sup.+ composition for solid propellant NF.sub.3 -F.sub.2 gas generators and high detonation pressure explosives is described which combines high oxidizer content with good thermal stability. The novel composition has the formula (NF.sub.4).sub.2 MnF.sub.6, and a process for its production is disclosed.

Abstract: A method of coating a dry variola virus obtained by the inoculation of the mbryo of chicken eggs and stabilized by the addition of lactose, raffinose, lysine, sodium glutamate, isoniazid, and thiourea by treatment with methyl amyl acetate.

Abstract: A high speed digital equalizer provides a means for replacing the conventional transversal filter used to preset equalize a channel with simple digital circuits prior to data transmission. In particular, the analog to digital converter and digital multipliers of a transversal filter are replaced with a digital to analog converter and random access memory, respectively, which permits equalizers to be used with band limited channels operating at much higher data rates than previously possible because of sample rate limitations.

Abstract: A broad band flueric amplifier is disclosed which comprises means to incre the deflection of the fluid jet within the amplifier at higher frequencies of oscillation of the jet. The means for increasing jet deflection comprises vanes or protrusions positioned closely adjacent the jet path at selected distances from the nozzle. Acoustic feedback from these vanes or protrusions will assist the control pulse in deflecting the jet at selected frequencies of oscillation.

Abstract: A system is provided for remote determination of the attitude of a moving hicle. The system utilizes two remotely located transmitting-receiving stations and two retroreflecting single plane roof prisms mounted on the vehicle which may exhibit high angular rates about a roll axis. The two remotely located transmitter-receiver stations provide laser tracking of the vehicle, continuously illuminating the vehicle with a laser beam located at each station so that the position of the vehicle relative to the remote stations is obtained. During tracking, the roof prisms located symmetrically on the vehicle provide both a return signal to the laser station regardless of the aspect angle of the vehicle and a doppler signal indicative of the vehicle aspect angle, from which the vehicle attitude is determined.

Abstract: A high strength, lightweight composite wire is made by intercalating grape fiber with a material that will impart high electrical conductivities to the fiber. The intercalated fiber is coated with a wetting agent and the coated intercalated graphite fiber then placed in a molten bath of magnesium or a low melting magnesium alloy. A composite wire is then produced by extrusion through a suitable die.

Abstract: A latching pin is held in a mating hole by a retaining wire prior to firing f a guided projectile to lock together a canard frame and an intermediate body which is part of a canard deflecting mechanism. Upon launch, the retaining wire is sheared by an inertia-driven shear mass but the latch pin is maintained in the latching condition by centrifugal force imparted to the canard frame and intermediate body during launch. Following launch, the canard frame and intermediate body are despun by aerodynamic drag on canards. Once despinning has proceeded sufficiently to reduce the centrifugal force to a value low enough to be overcome by a resilient member, the latch pin is withdrawn from the mating hole and relative rotation of the intermediate body and the canard frame are permitted to thus begin deflecting a pair of deflectable canards for producing aerodynamic lift to steer the projectile.

Abstract: Positional sensitivity of a Kipp type generator with respect to a gravitanal field is achieved by utilization of one or more selectively oriented gravitational sensitive valves in the chamber containing the liquid capable of providing the desired gaseous output. The gravitational sensitive valves may be used individually or in combination. Each valve permits operation when it has an orientation corresponding to a predetermined orientational range. A chamber whose geometrical shape is a parallelepiped employs an arrangement of four gravitational sensitive valves to provide gas generator operation independent of its orientation in a gravitational field.

Abstract: An apparatus and method for determining a film development parameter and a camera exposure setting to compensate for the luminous dynamic range of a subject being photographed which takes film non-linearities into account. Film characteristic curve data is stored in a read only memory of the apparatus. In a semi-automatic embodiment, information corresponding to desired film densities for two areas of the subject matter is manually inputted to the apparatus, which is then pointed towards the two areas. In an automatic embodiment, information corresponding to desired film densities for the brightest and least bright areas of the subject to be photographed is manually inputted, the entire subject is automatically scanned by a vidicon or equivalent means, and the brightest and least bright areas of the subject are automatically detected.

Abstract: A segmented sabot utilizes a double ramp configuration and a centrally poioned obturating band in alignment with the center of gravity of an in-bore projectile to improve the uniformity of the shear traction forces at the interface between the sabot segments and a subcaliber projectile, to reduce propellant gas blow-by and to enhance projectile in-bore and trajectory stability. The increased uniformity of shear traction forces between sabot and projectile interfaces and propellant gas self-sealing design permits a reduction in sabot weight of sufficient magnitude to increase the velocity of the projectile at the muzzle exit.

Abstract: An electromagnet sensing device which detects the first axial motion of a ssile relative to its launcher to provide timing information and indicate when the missile first moves axially.

Abstract: Cross-correlation of an image with a reference pattern is done in order to etermine recognizable content and gives a sharp correlation peak whenever both image and pattern are edge-enhanced, darkfield representations. Incoherent light, conventional optics and electronics are used to obtain edge-enhanced, darkfield representations which are obtained by sending the light from the object through a dual-aperture unit to a lens so that a recording medium located forward of the focusing plane of the lens will receive light blocked alternately by the regular (perimeter) stop and the central stop and will record the difference.

Abstract: This invention disclosure describes a thin film plane-polarized electro magnetic energy pickoff system. The system provides a wide-angle linear range of .+-.40 degrees with a cosine nonlinear range of .+-.65 degrees. The design allows all active components to be mounted on the unstabilized housing structure, thus eliminating torque stabilization problems.

Abstract: A monolithic laser optical cavity structure and method of forming by use of planar photolithographic and crystal regrowth techniques. An original growth multilayer double heterostructure laser structure is grown by LPE on a N+-GaAs substrate. V-grooves are then etched in the epitaxial layers down through the optical cavity by photolithographic techniques. GaAlAs is grown in the V-grooves by crystal regrowth techniques up to the original surface of the laser wafer thus isolating the lasers from each other. The lasers are then separated to form laser arrays.

Abstract: Disclosed is a tunnel diode consisting of an accumulation region of p-type GaSb and an accumulation region of n-type InAs separated by a thin layer of a quaternary compound consisting of InGaSbAs. Such a diode structure converts the interface between the two accumulation regions of p-type and n-type material from what would normally be an ohmic junction into a tunneling junction. Such a tunnel diode requires no heavy doping which is normally required for a tunnel diode.

Abstract: A latching system for an infrared suppression device, which reduces the iared signature of the exhaust of a gas turbine engine, employs a two-point hinge for supporting and swivelling the IR suppressor and for permitting the IR suppressor to be translated forward and backward a substantial distance in order to complete the latching operation. Guide pins entering guide holes and held in firm engagement therebetween by retractable hooks engaging loops, support the forward end of the suppressor to the aft end of the gas turbine engine while resisting lateral and twisting displacement of the suppressor when it is latched in place.

Abstract: Narrow pulse modulation (less than four nanoseconds) of millimeter wave ts will enable radar systems to achieve improved pattern recognition. The modulator has an outer cylindrical return shield surrounding a tetrode thyratron. An inner cylindrical shield connected to the anode provides capacitive energy storage for generating the output pulse when the control grid is triggered. The anode is connected via only a resistance to the direct current supply.

Abstract: A trim circuit for compensating for null offset of the jet stream in a flic transducer, such as an amplifier or jet deflection sensor, includes a flow bias control circuit and a supply sensitive difference flow control circuit. The flow bias control circuit supplies fluid pressure to a pair of symetrically disposed control channels at the input end of the transducer. This fluid pressure tends to decrease the amount of null offset of the jet stream from a central axis of the transducer which intersects a pair of symetrically disposed output channels. The supply sensitive difference flow control circuit removes the null offset remaining after correction by the flow bias control circuit. The supply sensitive difference flow control circuit may be disposed in one of the later stages of a cascaded fluidic amplifier chain or at the control inputs of a single stage transducer or amplifier.