Abstract: A process for silver coating superconducting ceramic powder by(1) coating the superconducting ceramic powder particles with AgNO.sub.3 ;(2) melting the AgNO.sub.3 so that it wets and forms a uniform coating over the surfaces of the particles; and(3) decomposing the AgNO.sub.3 to form a thin, uniform coating of silver metal on the surfaces of the particles.The product is a loose powder of the superconducting ceramic particles which are uniformly coated with silver metal. The powder can be cold worked (e.g., swaged, forged, etc.) to form superconducting structures such as rods or wires.

Abstract: A 360 degree surveillance system for detecting an infrared IR signal coming rom a scene. The IR signal is reflected by the scanning mirror to an imaging lens. The scanning mirror rotates 360 degrees around a vertical axis. The imaging lens images the IR signal through a derotator onto a linear array of IR detectors. The derotator serves to keep the image of the IR scene in a proper orientation. The detectors sense the IR signal and produce a current proportional to its strength. Each detector is the beginning of a channel of information. Each channel has operational amplifiers to process the signal, control gain, restore dc, etc. The output of the amplifiers are fed to a linear array of LED's. The light output of the LED's passes through a rotator and is imaged by a projector lens, after reflection off a rotating mirror, onto a cylindrical screen. The purpose of the rotator is to keep the image of the LED's in the proper orientation on the screen.

Abstract: An electro-optical target acquisition system having a scanning mirror which otates through a 360.degree. azimuthal plane. The infrared (IR) signal of a target is reflected off a mirror and imaged by a lens through an optical derotator onto a linear array of IR detectors. The detectors produce a current proportional to the strength of the IR signal. The current of each detector channel is amplified and fed to a corresponding light emitting diode, LED, that is part of a linear array of diodes. This light is imaged by a coupling lens through an optical rotator onto the photosurface of an image intensifier tube. The light image of the LED's creates a corresponding electron image. The electron image is swept across the tube and impinges onto the tube's phosphor output plate and creates a light output. The light output is an intensified image of the LED's.

Abstract: A pair of wire specimens supported within a transparent frame established by two sets of pulleys are interconnected between a common powered rotor and a pair of wire tensioning weights protectively enclosed by plastic sheathings. The wire specimens are simultaneously and cyclically displaced along direction changing paths through test medium during a testing operation terminated in response to rupture detected by sensing switches engaged by the weights.

Abstract: A method of melt casting plastic bonded explosives by:A. forming a uniform binder mixture of the following ingredients(1) from 10 to 30 weight percent of a triblock polymer of the formula A-B-A wherein A represents a polystyrene block and B represents an elastomeric midblock which is selected from the group consisting of polybutadiene, polyisoprene, and polyethylenebutylene; and(2) from 70 to 90 weight percent of a low viscosity oil selected from the group consisting of naphthenic, paraffinic, and olefinic oilsby mixing the ingredients under low-shear conditions at a temperature of from 80.degree. C. to 110.degree. C.;B. mixing an energetic filler into the binder mixture under low shear conditions and at a temperature of from 80.degree. C. to 110.degree. C., provided that the viscosity of the mixture does not exceed 20 kilopoise;C. pouring the energetic filler-binder mixture formed in step B into a mold; andD. cooling energetic filler-binder mixture to form a solid explosive composite.

Abstract: A method of forming diffusion bonds between aluminum and aluminum alloy saces by coating the surfaces with molten AgNO.sub.3 and then decomposing the AgNO.sub.3 to form a thin uniform layer of silver on the surfaces before forming the diffusion bond. The AgNO.sub.3 coating and decomposition in treatment permanently breaks up the Al.sub.2 O.sub.3 coatings on the aluminum or aluminum alloy surfaces, making diffusion bonding possible.

Abstract: A 360 degree infrared surveillance system comprising a scanning head rota on a turntable having optics and IR detectors in a vertical linear array, amplifiers for each detector and light emitting diodes for each respective detector/amplifier channel. The light from the LED's is imaged onto photodetectors whose output is amplified and fed to a corresponding LED. An optical rotator causes the image of their light to rotate. A lens images this light onto photodetectors located on the projector turntable, rotating synchronously with the scanner head. The photodetector current is amplified and fed to a linear array of LED's and imaged onto a cylindrical screen for display.

Abstract: A test set including a digital card tester section and a satellite simulator section is used to detect the reduced capabilities of an associated navigational satellite receiver and to isolate malfunctions therein. The digital card tester section is configured to generate digital signals (signatures) which are used to test and isolate faults in four digital system boards (cards) of the associated navigational satellite receiver. The satellite simulator section is configured to generate a facsimile of a navigational reference signal which is normally transmitted by an associated satellite system and received by the aforementioned associated navigational satellite receiver. The facsimile signal is used to test the receiver-processor section of the associated navigational satellite receiver.

Abstract: Interfacing of different logic level devices is effected through a multi-ic level converter under selective control of an assembly of coupler connectors enabling different logic level voltage conversions and operational monitoring of the converter.

Abstract: An explosive safety junction which can meet the high reliability and safety standards of conventional or nuclear weapon safing devices. The safety junction is an explosive logic device having an inlet trail which diverges into one or more tiers of safety trails and converges to form an outlet trail. The safety trails are crossed by a control trail which propagates a control detonation wave which severs the safety trails and prevents an input detonation wave from proceeding from the inlet trail to the outlet trail to detonate the weapon.

Abstract: This invention relates to detecting and ranging on energy sources and more articularly to ascertaining the presence and range of sound emitting sources by passive apparatus.

Abstract: An underwater signalling device to fire explosives at a preselected depth a prearranged time sequence, which is intended to be part of an underwater sound communication system.

Abstract: A land vehicle sensing device includes a geophone for detecting vibratory gnals and a bandpass amplifier for limiting the electrical output of the geophone to those signals indicative of land vehicles. A real-time frequency analyzer provides a normalized power density spectrum signal which is threshold detected and averaged to provide an indication of land vehicle intrusion.

Abstract: This discloses an improved side-scan sonar capable of locating objects on e ocean floor including the strip directly beneath the sonar transmitter and receiver, which in prior arrangements had to be obtained by another pass. The arrangement includes a platform having acoustic transmitters spaced apart a substantial distance on either side of acoustic receivers. The transmitter on the right directs its acoustic output to the left and the transmitter on the left directs its acoustic output to the right for increased shadow forming and enhanced detection by the receiver of objects of height directly beneath the receiver.

Abstract: A pulsed laser beam aiming apparatus is configured such that substantially 00% of the energy from a pulsed laser beam from a Q-switched pulsed laser device is accurately aimed at a distant target/obstacle in space. The pulsed laser beam is reflected off of a multifaceted polygonal mirror spinning about its axis and perpendicularly affixed to a rotatable azimuthal table wherein the spinning mirror provides elevational orientation, and, in conjunction with the rotatable azimuthal table, azimuthal orientation. Control circuit and associated equipment cause the Q-switched pulsed laser device to be triggered on when a facet of the mirror is in the proper elevational and azimuthal orientation for the pulsed laser beam to hit the target/obstacle. Correct aiming of the pulsed laser beam at the target/obstacle is accomplished when the coordinates thereof are specific only as an elevational angle .+-.5 above and/or below the horizon and an azimuthal angle between 0.degree. and 360.degree..

Abstract: A control system for a magentic submarine mine adapted to be fired automaally upon the approach of a vessel and in which the possibility of premature detonation of the mine by a minesweeper is substantially reduced. For example, some of the magnetic mines being laid in a particular mine field may be set so that after several actuations by a minesweeper a few of the mines will be exploded, the remaining mine field requiring a larger number of signals before detonation. By varying the number of signals before a mine is detonated the particular mine field after being swept is still considered lethal because many of the mines are left in the armed condition and others awaiting to be armed by subsequent minesweeping or the passage of vessels, as the case may be.

Abstract: A temperature compensation system that adjusts the temperature of an acoustic lens fluid in a prescribed manner to maintain the index of refraction of the fluid constant relative to the surrounding water thereby maintaining the focal length of the lens constant over its operating temperature range. The system comprises two temperature sensors, a programmed lens fluid temperature prescriber and an error amplifier all cooperating to direct a servomechanism system to adjust a temperature control system to either heat or cool the lens fluid to the prescribed temperature so that its index or refraction and focal length are held constant.

Abstract: A process for preparing 3-nitro-1,2,4-triazol-5-one by nitrating 1,2,4-trol-5-one in 70% nitric acid at a temperature of from 60.degree. C. to 75.degree. C. and then crystallizing out the product 3-nitro-1,2,4-triazol-5-one at a temperature of from 0.degree. C. to 10.degree. C. The nitro-1,2,4-triazol-5-one is useful as an explosive.

Abstract: The invention is directed to a Pyronol torch and holder device for provid quick and efficient attachment of the torch to a barrier target (flat, curved, or irregular shape) that is made of steel or magnetic steel alloys. The device provides for attachment to the target and for holding a cutting torch containing pyrotechnic material at a predetermined standoff distance from the surface of the target for proper operation of the torch and for permitting escape of products of combustion to minimize liftoff forces on the holding device tending to lift it from the target to which it is attached.

Abstract: A device for inspection by eddy current methods of materials exhibiting cumferential conductivity. This device finds application for the inspection of filament-wound carbon fiber reinforced composites which do not usually have sufficient conductivity in the axial direction to allow inspection by conventional surface probes while still providing the desired resolution. This device is also useful in inspecting thick-walled circumferentially conductive materials, including metal, where their thickness would require a surface probe of such diameter as to be impractical.