Abstract: A metal mold core which is partially insulated includes a metal continuous hard skin layer over the core and over the insulation to avoid discontinuity caused delamination in the presence of flowing injected plastic. The skin layer includes abrasion resistant nickel deposited over electroytically and electrolessly deposited copper applied over an interface metal layer on the core. The insulation layer includes multiple layers of a polyimide resin one of which layers includes glass micro spheres for decreasing the thermal conductivity to increase its insulation property and for decreasing the coefficient of thermal expansion (CTE) of the insulation to more closely match the core CTE to further preclude delamination in the presence of temperature excursions.

Abstract: Silicon hydrides substituted with oxygen containing radicals such as alkoxy, can be silylformylated with alkynes and carbon monoxide in the presence of a rhodium catalyst to produce silyl alkenyl acetals. The silyl alkenyl acetals are useful as plasticizers for organosilicon copolymers.

Abstract: A phosphor comprising an effective amount of cerium to provide luminescence, and the balance substantially an oxide compound of hafnium and an alkaline earth from the group consisting of barium, strontium, calcium, and mixtures thereof, having substantially a perovskite crystal form.

Abstract: Apparatus for measuring or compensating for phase or time delay between a reference signal and a desired signal produces an approximate error signal by differentially summing the desired and reference signals. The appoximate error signal is then used, in a feedback loop, to control application of an adaptive delay to each of the reference and desired signals. The total lead or lag difference is represented by the difference between the two delays applied to the reference and desired signals, respectively. The phase or time delay measurement or compensation arrangements may be applied to linear variable differential transformers, synchronous AM detectors, zero crossing detectors and phase locked loops. Variations on this basic technique can yield substantially exact measurement or compensation. The invention is applicable to sampling arrangements including oversampling/decimation or interpolation/decimation to increase compensation accuracy to any desired degree.

Abstract: Graft polymers are prepared by the free radical reaction of a base polymer such as polyethylene or polypropylene with an olefinic compound containing a tertiary alkyl ester group, which may be a simple carboxylic acid or a carbamic acid ester group. Upon melt blending or the like with polymers containing other functional groups, such as carboxy- or epoxy-functionalized polyphenylene ethers, the t-butyl groups are removed by thermal degradation and there are obtained copolymers which are useful to compatibilize blends of the corresponding polymeric constituents.

Abstract: An elastomeric light valve has a substrate with a principal surface on which is formed a multiplicity of pixels; each pixel includes a first set of pixel electrodes interdigitated with a second set of pixel electrodes. A silicone elastomer gel is disposed over both the principal substrate surface and the two sets of pixel electrodes. At least one silicone/polycarbonate self-supporting pellicle is disposed substantially completely over the gel layer; the pellicle and elastomer gel layer are heat cured to improve the response of the layers to electrostatic forces induced in the light valve by control voltages applied during operation of the light valve. A layer of gold is disposed over the at least one pellicle and a layer of silver is disposed over the gold layer to provide an exposed specular surface which is easily deformed and resilient to transverse stresses.

Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 10 Cr 15 Mo 4 Al 4 Ti 3.5 Ta 2.5 Nb 1.25 Zr 0.06 C 0.05 B 0.

Abstract: An electrical motor with integral silencer is provided having a motor housing defining an inlet aperture at one end and an expansion chamber at the other end. The expansion chamber has a reduced cross-sectional area at the entrance and exit of the expansion chamber compared to the cross-sectional area of the chamber. The exit of the expansion chamber provides an outlet aperture in the housing. A stator is situated in the housing and a rotor is rotatably mounted within the stator. A fan is secured to the rotor and rotates therewith for pulling air in the outlet aperture through the stator and exhausting the air through the expansion chamber to the housing exterior. The expansion chamber provides an impedance mismatch for the acoustic energy generated by the fan preventing a portion of the acoustic energy from exiting the expansion chamber.

Abstract: Parallel architectures preprocesses large matrices from sampled coherent time apertures receiving signals from distant sources to produce lower order matrices, derived from pseudo coherent time apertures, which are computationally less burdensome. The large matrices are processed by frequency shifting, low pass filtering with an FIR filter, and executing front-end decimation to create the pseudo coherent time apertures, each corresponding to different subbands of the temporal frequency spectrum. The signals representing the pseudo coherent time apertures are processed using matrix based superresolution spectral estimation algorithms such as the Tufts-Kumaresan (T-K) reduced rank modified covariance algorithm and the Linear Minimum Free Energy algorithms to produce an image of the sources.

Abstract: A polycarbonate-di(alkaryl) p-phenylene diphosphate plasticizer matrix has a tensile strength and elastic modulus higher than neat polycarbonate. By blending an impact modifier with the matrix, resin blends having a wide variety of impact and tensile properties are prepared. The matrix can be used for thin wall instrument housings which can be injection molded to close tolerance. The di(alkaryl) p-phenylene diphosphate has the formula ##STR1## wherein each Ak.sup.1 is independently hydrogen or a methyl radical and each Ak.sup.2 is independently a monovalent hydrocarbon radical having from one to four carbon atoms.

Abstract: Disclosed are polymer blends and compolymers of polyphenylene ethers, functionalized by copolymers of dicarboxylic acid and salicylic acid, which react with polyamides and are capable of compatibilizing blends of polyphenylene ethers and polyamides.

Abstract: An apparatus for solder joining metal tapes to form laminated metal tapes comprises an alignment box having a base and a sidewall means extending therefrom to define a tapered inner channel extending through the box. The tapered channel having an entrance end and narrowing to an exit end. At least one tapered wall extending from the base and within the inner channel to define subchannels that are spaced at the entrance end and converge into the inner channel before the exit end. The sidewall means and tapered wall extending from the base to respective wall tops, and a cover extending over the channel and subchannels is mounted on the wall tops. The base, sidewalls, inner wall, and cover being configured to form the channel and subchannels to have a first preselected distance between the base and cover that is greater than the width of the tapes.

Abstract: One part heat curable organopolysiloxane compositions are provided which utilize a vinyl containing organopolysiloxane composition, a siloxane hydride, an effective amount of a platinum group metal catalyst and a sufficient amount of an azodicarbonyl compound as an inhibitor which is free of ester linkages.

Abstract: Compatible compositions comprising polyarylene sulfide-polyphenylene ether copolymers are prepared by the reaction of a polyphenylene ether containing epoxy groups, typically an epoxytriazine-capped polyphenylene ether, with a polyarylene sulfide containing epoxide-reactive functional groups, preferably amine groups. It is sometimes advantageous to anneal said compositions or molded articles prepared therefrom.

Abstract: An apparatus and method for monitoring corrosion to members within the core of a nuclear reactor, particularly fuel rod cladding. A sensor means is submerged inside the core of a nuclear reactor near the member of fuel rods. The sensor means is comprised of a generally cylindrical section having an outer surface that is subject to corrosion and radiation, and has a cross-sectional area A.sub.1. The sensor means additionally has a reference section subjected to radiation but not to corrosion, and having a cross-sectional area A.sub.2. At least one pair of first probes, separated by a length L.sub.1, is placed in electrical contact with the cylindrical section. At least one pair of second probes separated by a length L.sub.2, is placed in electrical contact with the reference section. A current is passed throughout the sensor means to produce a potential gradient in the cylindrical section and reference section.

Abstract: A composition and method of making polyphenylene ethers capped by copolymers of salicylic acid and dicarboxylic acid by reacting at least one polyphenylene ether with at least one of the aforementioned copolymers. The composition is useful to form copolymers capable of compatibilizing blends of polyphenylene ethers and polyetherimides.

Abstract: A low frequency RF plasma spray deposition method is provided, which is especially effective in reducing losses and improving particle heating. In one aspect of the invention, an RF plasma gun is operated in the frequency range below 1 MHz and an argon-helium mixture to which a third component, such as hydrogen, can also be admixed, is substituted for the standard argon-hydrogen mixture used at frequencies above 2 MHz. In another aspect of the invention, a RF plasma gun is operated in the frequency range of 400-500 kHz and specific start up and operating procedures and conditions are set forth for successful deposition of titanium and refractory metal alloys.

Abstract: A phased array sector scanning ultrasonic imaging system produces digitized baseband samples of the received ultrasonic echo signals amplified by a time gain control (TGC) to compensate for dispersion losses in the media in which the ultrasonic signals propagate. A time frequency control filter employs the same TGC control signal to calculate a phase shift correction as well as the coefficients which determine the characteristics of a bandpass filter such that the frequency dependent dispersion losses in the ultrasonic echo signals are compensated.

Abstract: A rotor assembly for an internal permanent magnet rotor comprises a plurality of interior laminations stacked to form a substantially continuous internal core and a plurality of external laminations stacked to form a substantially continuous external core. A plurality of permanent magnets are positioned between the internal and external cores and folded in the radial plane so as to form a substantially W-shaped arrangement. The magnets may be placed in slots formed through the stacked laminations between the internal and external core sections or the internal and external core sections may be formed as two separate units with the magnets sandwiched therebetween. The core laminations may be strengthened by using nonmagnetic inserts in selected positions which can be welded to the magnetic portions of the laminations. The outer core portion, when separate from the inner core portion, may be held against the inner core portion by bolts through the outer core portion or by a sleeve around the rotor assembly.

Abstract: A container for electrochemical reactants for an electrode is provided, as well as electrodes employing the same. The electrodes can withstand the rigorous environment of a nuclear reactor core. The design of the container reduces stresses in the electrode and significantly improves its reliability. The container has a generally cylindrical member of an insulator. The member has a base region whose outer surface is a surface attachment region. The base region has an annular channel for a lead. The base region also has a generally conical cut-out. Sidewall means extend from said base to define a cavity for containing electrochemical reactants, e.g., silver chloride. A generally conical insert of an insulator mates with the cut-out. The outer surface of the insert, cut-out, and surface attachment region is metallized, and the insert is set in place by brazing. In the electrode the lead is in electrical contact with the apex of the insert.