Abstract: A digital logic controller providing instruction execution times on the order of 50 nanoseconds and employing a read-only memory outputting instructions to a pipeline register, a portion of each instruction providing a status-select control signal and address signals for controlling selection of the next instruction from the read-only memory.

Abstract: A disc brake system for a shuttle orbiter including an annular disc element (10) having internal radially directed and angularly spaced relief slots (12) and trapezoidial shaped carbon pad members (15) disposed circumferentially around the disc element. T Clips (19, 19') snugly engage the outer ends of the pad members and are attached to rivet heads (34, 35) and (34', 35') and have guide members (51, 51') slidably received in guide grooves (50, 50') in a spring housing (20). Springs (61) provide a force tending to move the T Clips toward the center of the disc where the magnitude of the force can be adjusted by a screw (65).

Abstract: A small component package employing a ring frame 11 of a mouldable polyamide-imide thermoplastic directly moulded onto a heat conducting base plate 10 with integral moulded anchoring pins of the thermoplastic material engaging corresponding bores 21 and 22 through the base plate. The other edge of the ring frame 11 is metalized as is the interface area 13 with a cover plate 12 of the same thermoplastic material for a soldered seal. Multiple solid electrical leads 17, 18, 19, 20 are moulded into the ring frame 11 during the base plate-to-ring from moulding operation to provide an inexpensive, sealed package which is also light in weight. Threaded inserts 14 facilitate a firm connection to an external heat sink surface along surface 10a of base plate 10.

Abstract: A welding monitoring system is constructed having an arc welder (16) mounted in an enclosure (12) containing a pair of periscopically positioned mirrors (56, 60). A welding electrode (64) extends from the welder (16) through an opening (58) in the mirror (56) and through an opening (62) in the enclosure (12). The mirror (56) is inclined to reflect an image of a welding operation to the mirror (60), which in turn is inclined to reflect the image through an opening (72) in the enclosure (12) to a third mirror (98). This mirror (98) is mounted in an adjoining region (100) between support members (84, 86) which are coupled perpendicularly to each other, with one member (86) coupled to the enclosure (12) by a rotatable coupling (92). The coupling (92) allows the enclosure (12) and the welder (16) to be rotated about an axis (71) and locked in a selected position by set screws (88).

Abstract: 1-[(Diorganooxyphosphonyl)methyl]2,4- and -2,6-diamino benzenes are reacted with polyacylhalides and optionally comonomers to produce polyamides which have desirable heat and fire resistance properties. These polymers are used to form fibers and fabrics where fire and flame resistance properties are important, e.g., aircraft equipment and structures.

Abstract: A macrocrystalline or single crystal semiconductive material is formed from a primary substrate including a single crystal or several very large crystals of a relatively low-melting material. This primary substrate is deposited on a base such as steel or ceramic, and it may be formed from such metals as zinc, cadmium, germanium, aluminum, tin, lead, copper, brass, magnesium silicide, or magnesium stannide. These materials generally have a melting point below about 1000.degree. C. and form on the base crystals the size of fingernails or greater. The primary substrate has an epitaxial relationship with a subsequently applied layer of material, and because of this epitaxial relationship, the material deposited on the primary substrate will have essentially the same crystal size as the crystals in the primary substrate.

Abstract: A GPS receiver having a number of channels, one for each of a plurality of satellites, receives an aggregate of pseudorange code time division modulated signals from some or all satellites and converts the aggregate to baseband and then to digital form for separate processing in the separate channels, each of which includes a complex mixer for adjustment of the baseband signal to a smooth estimate of frequency, .omega., for the next measurement interval, and an N-lag cross correlator which receives a replica of the pseudorange code adjusted for a smoothed estimate of the pseudorange (delay), .tau.. A fast Fourier transform processor computes the signal energy as a function of Doppler frequency for each correlation lag, and a range and frequency estimator computes estimates of pseudorange, .tau., and frequency, .omega..

Abstract: A method for coating a substrate with rapidly solidified metal which comprises spraying a mixture of rapidly solidified metal powder and small peening particles at high velocity against the substrate, said velocity being sufficient for the rapidly solidified metal powder and peening particles to impact the substrate and simultaneously bond the metal powder to the substrate. If the substrate is metallic, the method may provide the simultaneous mechanical working of the substrate surface.

Abstract: Systems are described for the acoustic levitation of objects, which enable the use of a sealed rigid chamber to avoid contamination of the levitated object. The apparatus includes a housing forming a substantially closed chamber, and means for vibrating the entire housing at a frequency that produces an acoustic standing wave pattern within the chamber.

Abstract: Lanthanum sulfide is maintained in the stable cubic phase form over a temperature range of from 500.degree. C. to 1500.degree. C. by adding to it small amounts of calcium, barium, or strontium. This novel compound is an excellent thermoelectric material.

Abstract: A fast voltage pulse is applied to a transducer which comprises a composite of multiple layers of alternately polarized piezoelectric material. These layers are bonded together and positioned over the curved leading edge of an aircraft wing structure. Each layer is relatively thin and metallized on both sides. The strain produced in the transducer causes the composite to push forward resulting in detachment and breakup of ice on the leading edge of the aircraft wing.

Abstract: Baffles (34) in infrared telescope (10) extend circumferentially around tube (12) of the telescope. Each of the baffles (34) has a concave, rearwardly facing curved surface (36) and a frontwardly facing planar surface (38). Baffles (34) extend from the interior wall of tube (12) in an acute angle with the optical axis (20) of the telescope, relative to front end (14) of the tube (12). This acute angle becomes greater for the baffles (34) toward rear end (16) of the telescope (10). Incoming off axis rays (44) are reflected by the planar surface (38) of the baffles (34) against the curved surface (36) of a forward adjacent baffle (34) and are reflected back and forth between adjacent surfaces (38) and (36) a number of times before being reflected back as rays (46) out of the front end of the telescope (10). Other off axis rays (40) are directly reflected as rays (42) by the planar surfaces (38) of the baffles (34).

Abstract: A circuit for use in a transponder located in an aircraft or the like for identifying a true side lobe suppression signal being transmitted by a ground located transmitted system. The true side lobe suppression signal includes at least pulses P1 and P2. The circuit causes the transponder to produce a reply signal upon the amplitude of the P1 pulse being a predetermined ratio to said P2 pulse. The circuit includes a pair of transistors with a capacitor connected to the output of the second transistor. The pulses P1 and P.sub.2 are supplied to the base electrode of the first transistor. Pulse P1 turns on the two transistors and charges the capacitor to a predetermined level so that when the second pulse P2 arrives, it does not turn on a transistor when it is equal to or less than the first pulse P1.

Abstract: Metal 4, 4', 4", 4"'-tetracarboxylic phthalocyanines (MPTC) are prepared by reaction of trimellitic anhydride, a salt or hydroxide of the desired metal (or the metal in powdered form), urea and a catalyst. A purer form of MPTC is prepared than heretofore. These tetracarboxylic acids are then polymerized by heat to sheet polymers which have superior heat and oxidation resistance. The metal is preferably a divalent metal having an atomic radius close to 1.35.ANG..

Abstract: An improvement of a precision manipulator for use in UHV systems with sample transfer capability in which a spring loaded thermocouple 47 and a heater electrode (51, 52) are both in direct contact with the transferred sample 35. The thermocouple and heater electrode assembly are mounted concentric with a sample receiving block 33 on the end of an offset manipulator 20. Hence, when a sample is transferred from an introduction chamber 12 into the UHV chamber 11, it contacts the spring loaded thermocouple 47 and then seats a heater electrode 52. Cooling by a copper plate 41 and a strap 22 combined with the resistance heating capability allow sample temperatures over the range of 150.degree.-1750.degree. K. while positioned in front of any diagnostic instrument in the UHV system and while taking data with these instruments.

Abstract: An apparatus and method for measuring minute quantities of moisture and other contaminants within sealed enclosures such as electronic assemblies which may be subject to large external atmospheric pressure variations.An array of vacuum quality valves (20 thru 32) is arranged to permit cleansing of the test apparatus of residual atmospheric components from a vacuum source (13). This purging operation evacuates a gas sample bottle (36), which is then connected by valve settings to provide the drive for withdrawing a gas sample from the sealed enclosure under test into the sample bottle through a colometric detector tube (Drager tube) (19) which indicates moisture content. The sample bottle (36) may be disconnected and its contents (drawn from the test enclosure) separately subjected to mass spectrograph analysis. The use of an inert reference gas (12) admitted during the test, facilitates the determination of free volume and internal pressure within the test unit.

Abstract: An arrangement for calibrating a photon detector particularly applicable for the ultra-violet (UV) and vacuum ultra-violet (VUV) regions is based on electron photon coincidence utilizing crossed electron beam-atom beam collisions. Atoms are excited by electrons which lose a known amount of energy and scatter with a known remaining energy, while the excited atoms emit photons of known radiation. Electrons of the known remaining energy scattered in a particular direction are separated from other electrons and are sensed and counted. Photons emitted in a direction related to the particular direction of scattered electrons are detected by a detector to serve as a standard. Each of the electrons is used to initiate the measurement of a time interval which terminal with the arrival of a photon exciting the photon detector.

Abstract: A heat-resistant, protective glove having a shell made of a fabric of a temperature-resistant aromatic polyamide fiber, the outer surface of the shell being coated with a fire-resistant elastomer and a liner, generally conforming and secured to the shell and disposed inwardly of the shell, the liner being made of a felt fabric of a temperature-resistant aromatic polyamide fiber.

Abstract: An ion mass spectrometer is described which detects and indicates the characteristics of ions received over a wide angle, and which indicates the mass to charge ratio, the energy, and the direction of each detected ion. The spectrometer includes a magnetic analyzer (18) having a sector magnet (24) that passes ions received over a wide angle, and an electrostatic analyzer (30) positioned to receive ions passing through the magnetic analyzer. The electrostatic analyzer includes a two dimensional ion sensor (32) at one wall of the analyzer chamber, that senses not only the lengthwise position of the detected ion to indicate its mass to charge ratio, but that also detects the ion position along the width of the chamber to indicate the direction in which the ion was travelling.

Abstract: Apparatus for eliminating beamsplitter generated optical aberrations in a pupil concentric optical system providing a plurality of spatially separated images on different focal planes or surfaces (30, 56). The system employs a buried surface beamsplitter (40, 40') having spherically curved entrance (42) and exit faces (44, 54, 74, 76) which are concentric to a system aperture stop (10) with the entrance face being located in the path of a converging light beam (34) directed thereto from an image forming objective element (12) which is also concentric to the aperture stop.