Abstract:
A ring is formed having alternating segments of ferromagnetic and paramagnetic materials. The ring is formed by first providing an annular ring of a high strength magnetic steel. Teeth are formed on the outer surface of the ring by forming troughs of the ferromagnetic material. Low pressure plasma deposition is used to fill in the troughs with a high strength paramagnetic material. The excess steel and excess plasma deposited material is removed to leave the finished ring of alternating segments of ferromagnetic and paramagnetic material.
Abstract:
An optical transmission filter (10) for effecting differential phase delay upon light in a beam polarized in a P dimension, as a function of position within the filter aperture for far field correction. The filter employs two lenses (12) (14) of birefringent material, the crystal optic axes (13) (18) of the respective lens materials being oriented in mutually orthogonal positions and at a 45 angle to the P dimension. The lenses have their adjacent surfaces respectively concave (16) and convex (15) with the same radius of curvature and their non-adjacent surfaces (11) (17) flat. The two lenses may be both spherical or both cylindrical. The correction provides an improvement in beam quality in laser systems operating with larger beam apertures or at higher powers.
Abstract:
An electronic demand register (46) includes a processor (52) for calculating a demand in a demand subinterval. At the end of each demand subinterval, the calculated demand is summed with the demand in the preceding N-1 subintervals to derive an interval demand over N contiguous subintervals. The processor (52) employs volatile memory which stores a previously determined maximum demand and a substitute maximum demand. A non-volatile memory (64) is provided for storing the billing data and programmed constants in the event of an impending power outage. A power monitor (66) detects the possibility of an impending power outage and both enables and powers the transfer of data to the non-volatile memory (64). When power is resumed, the power monitor (66) enables resetting the processor (52) and retransferring the data from the non-volatile (64) to the volatile memory for resumption of demand metering. In addition, the demand register (46) responds to its removal from, and its replacement in, the electric meter (10) in a manner similar to its response to a power outage.
Abstract:
A polymer mixture on the basis of a polyphenylene oxide which is suitable for wire insulation extrusion. The polymer mixture comprises a polyphenylene oxide, optionally a polystyrene, a hydrogenated block copolymer, an aromatic phosphate compound, a mineral oil and optionally usual additives. The invention also relates to an electrically conductive wire comprising an insulation built up from the above-mentioned polymer mixture and provided around the electrically conductive wire by wire insulation extrusion.
Abstract:
Blends of (a) a polyetherimide and (b) a minor amount of an acrylate copolymer of C1-C5 acrylate and C1-C5 methacrylate. These blends have a higher impact strength than that associated with the polyetherimide component of the blends. In addition, the blends exhibit improved extrusion and molding performance characteristics over those of the polyetherimide component of the blend when molded alone.
Abstract:
Conductive thermoplastic having high EMI shielding effectiveness comprise a thermoplastic condensation polymer and incorporated therein a synergistic combination of metal flake and conductive metal or metal coated fiber.
Abstract:
Organopolysiloxane-polyimide copolymers based on the use of norbornane anhydride terminated organopolysiloxane, organic diamine and optionally other aromatic bisanhydride. The organopolysiloxane-polyimide copolymers can be used as insulation for electrical conductors, adhesives, molding compounds, coatings, laminates and tough elastomers.
Abstract:
A coated polycarbonate article having improved resistance to degradation by ultraviolet radiation, abrasion and attack by chemical solvents comprising a polycarbonate resin article with its surface layers impregnated with an ultraviolet radiation absorbing compound and having deposited on said impregnated surface a coating comprised of (i) a thermoplastic acrylic polymer containing functional groups primer layer; and (ii) a top coat disposed on said primer layer containing a colloidal silica filled thermoset organopolysiloxane.
Abstract:
A method for the selective removal of boron halides and other Lewis acid-type impurities from silicon halides. Treatment of contaminated silicon halides with siloxanes, which react with the impurities, allow the distillation of silicon halide which is virtually free from contamination within extremely low limits of detectability.