Abstract:
A miniature two degree of freedom fluid bearing angular rate sensor used primarily for tactical applications includes a spherical hydrodynamic fluid bearing rotor, a permanent magnet motor/torquer, and an optical pick-off, all of which are arranged to provide two axes of rate information in a small package. The individual components can be pre-assembled as sub-assemblies, and individually stocked and tested for final assembly.
Abstract:
This invention is directed to metallic alloy consisting essentially of iron, boron and silicon and having a composition in the region A, B, C, D, E, F, A of figure 1, said alloy having a crystallization temperature of at least about 490 DEG C, a saturation magnetization value of at least about 174 emu/g at 25 DEG C, a core loss not greater than about 0.3 W/kg, measured at 25 DEG C, 60 Hz and 1.4 T after having been annealed at 360 DEG C for about 2000 seconds, a core loss not greater than about 0.3 W/kg, measured at 25 DEG C, 60 Hz and 1.4 T after having been annealed at about 380 DEG C for a time ranging from about 1000 to about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25 DEG C, 60 Hz and 1.4 T after having been annealed at 360 DEG C for about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25 DEG C, 60 Hz and 1.4 T after having been annealed at 380 DEG C for about 1000 seconds, a fracture strain of at least about .03, measured at 25 DEG C for the alloy after having been annealed at about 360 DEG C for about 1.5 hours, and a fracture strain of at least about .03, measured at 25 DEG C for the alloy after having been annealed at about 380 DEG C for about 1.5 hours. The alloys exhibit improved utility and handleability in the production of magnetic cores used in the manufacture of electric distribution and power transformers.
Abstract:
A transmit system for collision avoidance systems having autocalibration. A four element antenna array (10) is provided. Each element (12, 14, 16, 18) is selectively connectable to a transmitter (20) through a power divider (22) and an isolator (24, 26, 28, 30). Three of the elements (14, 16, 18) further have a programmable phase shifter (34, 38, 42) in line to the transmitter (20). A phase detector (46) having a first input selectably connectable to one of the elements and a second output connected to the transmitter is provided. By selectively connecting one element to the transmitter (20) and one element to the phase detector (46) and then selectively programming the appropriate phase shifters (34, 38, 42), the differentiated phase delay in each channel of components associated with an antenna element can be calibrated.
Abstract:
A flexible, uncoated glove made from nonmetallic fabric comprising at least one fiber is disclosed. The glove is characterized by either weighing no more than about 30 g or having a thickness of no more than about 1.25 mm (0.05 inch), being cut resistant over some portion thereof by enduring without cutting through at least 5 cycles of an impact cam cut test, having compliance so that the wearer has a high degree of tactility, and having a cut resistance of at least 5 cycles of an impact cam cut test after a disinfectant treatment with sodium hypochlorite. The gloves are particularly useful in the medical field where they provide excellent cut protection and can be disinfected at least once while maintaining an acceptable level of cut resistance. In an alternate embodiment, a similarly characterized glove is made from a layer of fibrous material adhered to a surface of an elastomeric glove without being fully encapsulated thereby. This glove is also particularly useful in the medical field where it provides excellent cut protection.
Abstract:
Novel azeotrope-like compositions comprising dichloropentafluoropropane, ethanol and a hydrocarbon containing six carbon atoms which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
Abstract:
A low molecular weight copolymer reaction product of a copolymer acid of an alpha -olefin and an unsaturated carboxylic acid, preferably an alpha , beta -ethylenically unsaturated carboxylic acid, and at least one amino acid compound. The present invention includes a method of preparing the copolymer reaction product. The reaction product has excellent compatibility with other polymers, particularly polyamides. The copolymer reaction product is useful in a method to flush water from pigments.
Abstract:
An impact resistant rigid composite article comprising a fibrous layer comprising a network of filaments dispersed in a rigid matrix comprising one or more thermosetting resins and one or more thermoplastic resins.
Abstract:
High flux semipermeable membranes which comprise the polymerized reaction product within and/or on a porous support backing material may be prepared by contacting the porous support such as a polysulfone with an aqueous solution of a polyamide which may, if so desired, contain a polar aprotic solvent not reactive with the amines, a polyhydric compound and an acid acceptor. The surface of the coated support is freed of excess solution and thereafter contacted with an organic solution of a polyacyl halide for a period of time sufficient to form a polymerized reaction product within and/or on the support material. The resulting composite is then treated with a hydroxy polycarboxylic acid, polyaminoalkylene polycarboxylic acid, sulfonic acid, amine salts of acids, amino acid, amino acid salt, polymeric acid and inorganic acid, before drying of the membrane. This will enable the membrane to be stored in a dry manner prior to use thereof in a separation process. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water or the softening of domestic hard water.
Abstract:
A multilayer armor (40) comprising a hard ceramic impact layer (12), a vibration isolating layer (14) position adjacent to said hard impact layer (12) and in contract therewith, and a backing layer (16) attached to said vibration isolating layer (14) on the side opposite the side thereof attached to the hard impact layer (12).
Abstract:
A metal matrix composite is produced by forming a rapidly solidified aluminum base alloy into wire. The wire is arc sprayed onto at least one substrate having thereon a fiber reinforcing material to form a plurality of preforms. Each of the preforms has a layer of the alloy deposited thereon, and the fiber reinforcing material is present in an amount ranging from about 0.1 to 75 percent by volume thereof. The preforms are bonded together to form an engineering shape.