Abstract: Free radical cure of the bismaleimide of dimer diamine is accomplished with ydroperoxides promoted with a vanadium trineodecanoate/N,N-dimethyl-p-toluidine mixture to form a hard polymer.

Abstract: The effective lasing lifetime of coumarin 102 in 50:50 ethylene glycol is gnificantly extended by increasing the rate of pumping and photolysis, with a flashlamp in a laser system having a pyrex ultraviolet filter and an inert cover gas.

Abstract: A pyrogen igniter for small nozzle applications has a high initial output. igh initial output and long duration burning are achieved through utilization of a slow burning igniter main charge in conjunction with a booster pellet. A nozzle plate focuses and directs the output of the igniter as a gas jet while shielding the interior of the igniter from exterior temperature and pressure fluctuations which might otherwise operate to extinguish the igniter. A flush bridgewire/pressed prime igniter configuration and the elimination of loose powder in the igniter facilitates economical production and long shelf-life.

Abstract: Video signal monitoring apparatus searches a video signal for the existence f an imposed indicator signal having predetermined characteristics. The indicator signal is a series of pulses exceeding a predetermined brightness level and having a duration falling within a predetermined range of durations imposed one pulse per video line in a predetermined number of consecutive video lines in a video frame. A stripper circuit extracts signals indicative of the start of each video line and each video frame as well as pulses in each video line having a brightness level exceeding the predetermined brightness level which indicator pulses must exceed from the video signal as the video signal is received. The duration of each pulse extracted from a video line is determined and a counter is incremented for each line in which a pulse is found to exist having a duration falling within the range of durations established for indicator pulses.

Abstract: An ambient temperature thermal battery having two relatively high temperature melting electrolytes which form a low melting temperature electrolyte upon activation.

Abstract: A video amplifier for a raw video signal permits increasing the gain of the ignal so that it stands out from background noise prior to processing. The amplifier uses a sample and hold circuit between two gain stages to permit the raw video signal to only be sampled at a preset rate. This type of device is especially suitable for charge coupled device video where sampling is desired after a predetermined integration time for the pixel elements of a CCD array. This processing permits low voltage level signals to be amplified relatively isolated from background noise and then processed after being amplified to a level significantly above processing noise. The final gain stage permits amplifying suitable for standard video monitors to use the signal.

Abstract: A method of evaluating the cross-correlation properties of microroughness present at the interfaces in dielectric stacks is based on a comparison between observed and calculated angular distribution of scattered light. The calculation is based on a first-order perturbation treatment of the interaction of a monochromatic plane wave with a dielectric stack which has microroughness present at each interface. The average deviation of the interface microroughness from the perfectly smooth, ideal, situation is assumed to be much less than the incident wavelength. The theory retains the vector nature of the electromagnetic fields, allows for complex dielectric constants, arbitrary angles of incidence, scattering and polarization. The dielectric stack may have any number of layers of arbitrary optical thickness. In practice, angular scattering data is measured for various incident angles with either p- or s-polarized light. These data are then compared to the calculated distribution of scattered light.

Abstract: Apparatus for multiplexing selected information contained in first and sed pulse waveform signals includes an analog switch through which the first signal passes unchanged except for periods during which the switch is caused to be thrown. The first signal has periods of activity and inactivity. Voltage detectors detect pulses in the second pulse waveform well as periods of activity and inactivity in the first waveform. A logic network is responsive to the voltage detectors and produces a signal triggering a multivibrator to throw the analog switch during a period of inactivity in the first waveform to indicate the occurrence of a pulse in the second pulse waveform.

Abstract: A munition fuze electronic arming and firing controller includes a micropessor and logic network which verify controller operation and provide an enabling signal necessary to arm the fuze. A signal of predetermined duration is twice produced by the microprocessor and is utilized with a clock signal continuously produced in the logic network to cause a counter to count during two separate periods. The resulting counter count is checked by verifying logic which outputs a signal only if the count is a predetermined count after each counting period. If the counter output is twice verified and an energy storage component external to the controller is charged to less than a predetermined minimum the logic network outputs an enabling signal which triggers the microprocessor to produce drive signals utilized to arm the fuze by charging the energy storage device. User selected inputs and firing sensor initiated inputs initiate munition detonation at a predetermined time and under predetermined conditions.

Abstract: Minor slides in a geologic exploratory trench are stabilized by applying a ater diluted vinyl acetate-ethylene copolymer emulsion to the trench walls. Although the resulting emulsion and sand crust provides no structural support, it provides a surface cohesion which effectively stops all minor sliding and permits normal engineering logging to proceed.

Abstract: A reefing system to delay the development of a parachute wing is disclosed. single line system in conjunction with a slider and a two line system are described.

Abstract: The novel explosive compound, 1,4-dinitrofurazano[3,4-b]piperazine, is prred by the reaction of 2,3-dioximinopiperazine with a base, followed by the nitration of the intermediate furazano[3,4-b]piperazine. The nitrated compound has a density, detonation pressure, detonation velocity and Isp similar to RDX while being highly insensitive.

Abstract: A sabot fragment diverter deflects selected sabot fragments discarded by ot type ammunition in a directionally controlled manner to prevent direct fragment impact with the firing platform or impact of a deflected fragment with the projectile from which it is discarded. A fragment diverter cone which includes a deflecting surface, a fragment cutter and a barrier dam is connected to the muzzle end of a gun system by an extender cage and a mounting section.

Abstract: A thermally activated electrochemical cell utilizes a lithium-boron anode and a molten nitrate electrolyte selected from the group consisting of lithium nitrate, a mixture of lithium nitrate and sodium nitrate, a mixture of lithium nitrate and potassium nitrate, and a mixture of lithium nitrate and sodium nitrate with potassium nitrate, to provide improved cell electrical performance. The electrolyte is contained on a fiberglass separator and the electrolyte adjacent to the cathode may contain silver nitrate as well. Current densities over 300 mA/cm.sup.2 with a usable temperature range of over 150.degree. C. have been obtained. Anode open circuit potentials of about 3.2 V were found with little polarization at 100 mA/cm.sup.2 and with very slight polarization at 300 mA/cm.sup.2.

Abstract: A new compound 2,6-diamino-1,4,5,8-tetranitronaphthalene is disclosed and a method of preparation thereof. The new compound is useful as a high energy, high density explosive.

Abstract: A primary explosive, potassium 7-hydroxyamino-4,6-dinitro-4,7-dihydrobenzroxanide ##STR1## is prepared by reacting 4,6-dinitrobenzofuroxan with hydroxylamine in a methanolic solution of potassium bicarbonate.

Abstract: A thermally activated electrochemical cell utilizes an anode constructed of lemental lithium and transition metal powder. Iron is disclosed to be the best mode of transition metal powder. The cell uses nitrate salt electrolyte containing lithium nitrate and silver nitrate as a cathode enhancer. Electrical performance of this cell includes open circuit potentials of approximately +3.4 volts at 300.degree. C. and thermal activation within the range of 123.degree. to 465.degree. C. Current densities as high as 1,250 mA/cm.sup.2 have been demonstrated.

Abstract: A safe-arm device for use in a fuel-air explosive munition carried by an craft. The device has a housing having an environmental seal which is separated from the housing upon munition release to form a seal opening, a pressure probe for obtaining static and dynamic air pressure and extending through the seal opening when deployed, a piston and rod which is driven upon sensing of a sufficient differential air pressure between the static and dynamic air pressure probe, a safety lock which locks a pyrotechnic rotor and which disengages upon full extension of the piston rod, and an arming spring which is compressed by extension of the piston rod and which drives the pyrotechnic rotor for rotation against a mechanical escapement device thus providing for a timed rotation. The pyrotechnic rotor has two explosive wheels, each having switched detonators and upon receipt of electronic signals two explosive trains with a controlled time delay therebetween are initiated.

Abstract: A unidirection circularly polarized dual armed spiral antenna of a stripl printed circuit configuration is disclosed. The antenna is powered by a planar, edge connected, balun. The radial arms may be configured to spiral in any one of a multiplicity of different patterns and are not limited solely to Archimedean or logarithmic spirals.

Abstract: A plurality of strip-line elements are used as an antenna array. The direvity of the array is controlled by controlling the terminating reactance of the closely-coupled stripline elements.