Abstract: The present invention involves apparatus for performing a sequential problity ratio test to make decisions in a Friend Identification System. The apparatus determines a product of sequential ratio probabilities and compares them to appropriate threshold probability values to make decisions as to acceptability, non-acceptability, or the unknown nature of replies from a target.

Abstract: Compounds of the general formula: ##STR1## wherein R.sub.1 is a radical of an isomer of phthalaldehyde; R.sub.2 is a adical of an isomer of an aromatic dialdehyde selected from the class consisting of phthalaldehyde, naphthalene dialdehyde, phenanthrene dialdehyde, anthracene dialdehyde, biphenyl dialdehyde, terphenyl dialdehyde; and mixtures thereof and R.sub.3 is a radical of an isomer of an aromatic diamine selected from the class consisting of benzene diamine, naphthalene diamine, phenanthrene diamine anthracene diamine, biphenyl diamine, and terphenyl diamine, and the cyano-condensation resins thereof which are useful in preparing semiconductors.

Abstract: An improved method and means for pulse detection comprising a pair of comparators with different predetermined reference signals to one of which the input pulse is applied and to the other of which the derivative of the input pulse is applied.A zero-crossing detector is fed a second derivative of the pulse and provides an output to a NAND gate when said derivative crosses zero. Each comparator provides an output to said NAND fate when its input signal exceeds its reference signal. The NAND gate is connected to one input of a flip-flop and one input of a monostable multivibrator. The other input of the flip-flop is connected to receive the output of the input signal comparator. One output of the flip-flop is connected to an inverter pair which in turn is connected to a second monostable multivibrator; the other output of said flip-flop is connected to the first multivibrator which in turn is connected to the second multivibrator.

Abstract: A waterproof electrode useful in metal-working is obtained by coating the ectrode with a polyolefin selected from the class consisting of polyethylene, polypropylene, polybutylene and mixtures thereof at a thickness from 0.25 cm to 0.80 cm by a method which comprises placing the electrode inside a polyolefinic heat-shrinkable tubing of a length sufficient to cover at least 0.6 cm of the bare metal of an electrode with a flux coating and sufficient to extend at least 0.8 cm beyond the electrode and with a diameter and a shrinkability sufficient to bring the polyolefin in contact with the bare metal of a flux-coated electrode.

Abstract: Marine fungal growth is inhibited and/or eradicated in wood by contacting e wood with obtusastyrene whose formula is: ##STR1##

Abstract: A silicon-phthalocyanine-siloxane polymer having the formula ##STR1## WHEREIN Pc is a phthalocyanine nucleus, Ph is a phenyl group, n is an integer from 1 to 8, and x is an average value up to 20, is prepared by a method including a reaction of a phthalocyanine-silicon-disilanol with a bis(ureido) dialkyl silane or bis(ureido) siloxane or by the reaction of a phthalocyanine-silicon-disilanol with a bis(dialkyl) amino) silane or a bis(dialkylamino) siloxane. These polymers are useful as strengthening agents for high-temperature resins, such as polyimides, poly(phthalocyanines) or epoxies and as coatings or dyes.

Abstract: A random fluorinated polymer of the general formula: ##STR1## wherein x is an integer from 1 to 4, y is an integer from 1 to 4, z is 1 more, R' is selected from the group consisting of the 1,3 and the 1,4 isomers of --OC(CF.sub.3).sub.2 .phi.C(CF.sub.3).sub.2 O--, R" is selected from the group consisting of the cis and trans isomers of --O(CF.sub.3).sub.2 CCH.sub.2 CH.dbd.CHC(CF.sub.3).sub.2 O--, and R is either R' or R"; and epoxy resins and urethane resins prepared therefrom.

Abstract: A silicon-phthalocyanine-siloxy monomer having the formula:PcSi(OSiR'Ph(OSiR".sub.2 ).sub.r X).sub.2wherein X is a hydroxyl group or unreido group having the formula: ##STR1## Pc is a phthalocyanine nucleus, R' and R" are alkyl groups having from 1 to 8 carbon atoms, and r is an integer from 1 to 4. The monomers are useful as dyes and in polymer synthesis as reactive intermediates.

Abstract: This invention is directed to an armor plate made of three layers of diffnt materials each of which are separated by an adhesive. The assembly is an improved assembly which resists penetration from attack by fragments, and projectiles fired from rifles. The first layer is of a hard face material, the second layer has greater ductility than the hard face first phase and the third layer is doron, or any other type of fiberglass laminates.

Abstract: Strengthened and densified ceramic bodies are produced by hot pressing lead itanate powder into a lead titanate ceramic at a pressure from 1000 to 5000 psi and at a temperature from 700 to 1100.degree. C if the atmosphere is reducing or from 700 to 1200.degree. C if the atmosphere is oxidizing and by annealing the lead titanate ceramic at a temperature from 600 to 1100.degree. C in an oxidizing atmosphere for at least four hours.

Abstract: A "coldness-storage" unit for use in a refrigeration storage and cooling tank system for nighttime coolant storage while providing for subsequent daytime cooling. The "coldness-storage" unit has a closed tank which includes a plurality of cans containing a liquid material which freezes at a temperature below room temperature. The outer surface of the cans are coated with a wicking surface and the tank includes a condensable liquid such as butane, which vaporizes to fill the unoccupied space in the tank with butane vapor. The ends of the wick covered cans touch the butane so that the butane wets the wicks. A refrigerator/compressoris operated to cool condensation coils in the tank. The butane vapors in the unoccupied space condense on the condensation coils giving off heat to the refrigerator/compressor coils which lowers the vapor pressure within the tank.

Abstract: An optical waveguide power divider which uses a two-dimensional slab waveguide. An input confined to one arm propagates to a point where synchronism between two closely adjacent guides is abruptly introduced by introducing an overlay with a fast taper. The coupled guides are here sufficiently synchronous and close together that the symmetrical and asymmetrical normal modes of the coupled structure will be excited, each with 1/2 of the input power. Synchronism is then slowly removed by tapering the overlay to zero so that mode "a" selects arm #1 while mode "b" selects arm #2. These latter changes are adiabatic, i.e., slow enough tAfter synchronism has been removed, the two arms may be spatially separated to split the power into two directions.

Abstract: A method for determining in situ the thermal conductances of bonding layers of detectors in infrared detector arrays for quality selection of preferred detector arrays. Each detector of the array is heated successively by laser pulses of variable pulse width and the thermally-induced change in detector resistance is measured as a function of time after each laser pulse and converted directly to its corresponding temperature. Using measured values of detector resistance as a function of temperature for each detector, one can obtain the time-dependence of the detector temperature following each laser pulse for each detector of the array.

Abstract: A reflex triode for use in producing ultra-high-current (>10.sup.5 A), ul-high-power (>10.sup.11 W) ion beams includes an improved anode and an improved cathode and has a low inductance design. A cylindrical anode stalk supporting the anode is positioned inside of and closely spaced from a cylindrical cathode shank which supports the cathode. Magnetic insulation allows for a close spacing between the anode stalk and cathode shank which reduces the inductance. The improved cathode is embedded in a cathode mount to reduce divergence of the ion beam. The improved anode consists of conducting concentric rings with thin film in the space between the rings to produce a more uniformly dense ion beam having low divergence.

Abstract: A method for strengthening lead zirconate-lead titanate ceramic transducers hich comprises heating the transducer at a temperature from 900.degree. C to 1000.degree. C in a nonreducing atmosphere containing at least 20 volume percent of oxygen for at least one hour.

Abstract: A polymeric residue with one or more metals, salts, and oxides mixed therein, deposited on refrigeration system surfaces by a circulating halogenated hydrocarbon refrigerant, is removed from a surface by contacting the residue with a saturated aqueous solution or slurry with a pH from 2 to 4 of ethylenediaminetetraacetic acid at temperatures from 30.degree. C to 100.degree. C.

Abstract: A displaced-phase-center antenna technique which compensates accurately for he motion of an airborne radar system in both the boresight direction of the antenna and in the direction normal to the boresight. An antenna system comprising a broadside array of endfire arrays forms four receive beams which are displaced from each other in both the boresight direction and in the direction normal to the boresight. These four beams are used to produce signals which correspond to signals from two receive beams with phase centers having a separation equal in magnitude and direction to the aircraft's motion during the interpulse period. A signal scattered from a fixed object on a first transmitted pulse and received in one of the two receive beams will have the same phase characteristic as a signal scattered from the same fixed object on a subsequent pulse and received in the other receive beam. Upon proper delay of the first received signal, the returns from the fixed object may be cancelled.

Abstract: A moving-target indicator system uses adaptive loop cancellers for cancelg clutter. Each adaptive-loop canceller uses multiple memories and a switching circuit. The switching circuit switches each memory into the circuit to allow each of the memories to develop a weight W for a different selected range interval on a pulse-to-pulse basis.

Abstract: Storage of thermal energy in a ternary mixture of salts which comprises from 22.5 to 26.5 weight percent of sodium chloride, from 18.5 to 22.5 weight percent of potassium chloride and from 53.0 to 57.0 weight percent of magnesium chloride.

Abstract: A photoconductive detector comprising a thin film of photoconductive material deposited on a thin substrate of high thermal conductivity having a surface area that is large relative to the detector's absorbing surface area. The back surface of the substrate is metalized and soldered to a high-thermal-conductivity, large-thermal-mass heat buffer which is coupled to a heat sink. The resulting detector is hardened against damage resulting from laser irradiation.