Abstract: A rapid curing polybutadiene resin system dielectric coating composition suitable for coating electrical components such as thin film resistors is disclosed. This composition cures very rapidly and greatly improves adhesion to the coated article.

Abstract: A spray dryer apparatus is used to bring a water solution or slurry of finely-divided, basic reactant into intimate contact with a flue gas bearing acidic gases or vapors. The basic material reacts with the acids in the flue gas to form a particulate precipitate, while the water from the solution or slurry is fully evaporated in the gas stream. Conventional means are then utilized to remove the particulate reaction product from the flowing gas stream.

Abstract: The present invention is concerned with the fabrication of articles demonstrating the highly-crystalline, fine-grained internal microstructure of conventional glass-ceramic bodies, but which can be formed spontaneously from a molten glass. Thus, the present articles are not produced by heat treating a glass body at elevated temperatures to cause crystallization in situ as is required in the customary manufacture of glass-ceramic articles. More specifically, this invention relates to the fabrication of glass-ceramic articles from compositions within the MgO-Al.sub.2 O.sub.3 -B.sub.2 O.sub.3 -SiO.sub.2 -F field utilizing TiO.sub.2 as a nucleating agent, wherein mullite comprises the principal crystal phase, and which can be formed spontaneously from a molten glass.

Abstract: The instant invention is concerned with the manufacture of articles exhibiting the physical properties and internal microstructure of glass-ceramic bodies but which can be formed spontaneously from a molten glass. Hence, heat treatment of a precursor glass body is not required to cause the crystallization in situ thereof, such as is demanded in the production of conventional glass-ceramic articles. More specifically, this invention relates to the manufacture of glass-ceramic articles which are capable of being mechanically machined, having compositions within the K.sub.2 O--Li.sub.2 O--MgO--SiO.sub.2 --F field, wherein a fluormica comprises the principal crystal phase, and which can be formed spontaneously from a molten glass batch.

Abstract: The instant invention to the manufacture of articles exhibiting the highly-crystalline, uniformly fine-grained microstructure of conventional glass-ceramic bodies, but which can be formed spontaneously through cooling a molten glass-forming batch. Hence, the articles of the present invention are not produced by heat treating glass bodies at elevated temperatures to cause crystallization in situ as is required in the manufacture of the classic glass-ceramic articles. Instead, this invention provides a method for spontaneously-forming glass-ceramic articles having compositions within a narrowly-defined area of the Li.sub.2 O-Al.sub.2 O.sub.3 -B.sub.2 O.sub.3 -SiO.sub.2 -TiO.sub.2 field wherein alpha-quartz solid solution constitutes the predominant crystal phase.

Abstract: In drawing an optical waveguide, the blank is heated by a beam of laser radiation which has substantially zero power from the axis of the blank to a prescribed radial position and substantially uniform power from that position to a greater radial position. A rotating spinner splits radiation from the laser into two rotating beams, the paths of which are made to be non-intersecting with the axis of the blank being drawn. A conical reflector forms the radiation into a circumferential beam through which the blank passes.

Abstract: A multiple mode optical waveguide includes a glass core and a glass cladding around the core. In order to promote coupling between guided modes of light propagation, the core has cylindrical perturbations spaced along its length. The perturbations include index of refraction variations in rings within the core.

Abstract: A fluorine containing silicate glass substrate is heated to a temperature sufficiently high to permit fluorine to out-diffuse from the surface thereof. A surface region is formed having a gradient fluorine concentration in a direction perpendicular to the substrate surface, the region of lowest fluorine concentration having the highest refractive index. The resultant device is capable of functioning as an optical waveguide.

Abstract: An elongated burner, which produces a stream of metal oxide soot, comprises three adjacent housings. A centrally disposed housing contains a linear array of orifices for issuing a gas-oxygen mixture to produce a linear flame. Disposed on opposite sides of the central housing are two housings having orifices for issuing into the flame two linear streams of metal halide vapor. Gaps between the central and outer housings permit air to be aspired for stabilizing the flame. Additional flame stabilization may be achieved by providing a shield along the entire perimeter of the halide vapor streams to prevent the random aspiration of air into the sides of the flame.

Abstract: The present invention is concerned with a single-step process for hydrating alkali metal-containing silicate glasses starting with such fine-dimensioned forms as powders, granules, flakes, fibers, and thin sheets. The process, which contemplates hydration temperatures higher than 225.degree. C. and relative humidities less than 50%, permits the precise control of the quantity of water taken into the glass structure and, where the water content in the glass is held within about 1-25% by weight, the hydrated product of the above-cited powders, granules, etc., can be thermoplastically formed into sound bulk articles. A layer of the anhydrous powders can be applied to a substrate and then hydrated in situ to form glassy paints and coatings.

Abstract: A wall structure is provided for mounting an oxygen sensor probe to accurately measure the oxygen content of flowing elevated temperature atmosphere confined on one side of the wall. The sensor probe is protectively positioned and cushioned within a probe accepting bore through the wall by a flexible fibrous refractory material which thermally insulates and seals the probe within the bore from the surrounding environment. The sensing tip of the probe extends through the wall structure and is exposed to the elevated temperature combustion gases.

Abstract: A pipetter for drawing fluid into capillary tubes and the like. A capillary tube is forced into an adapter coupled to one end of a vented, flexible tube. A compression wheel rides in a guideway adjacent the tube, and is rolled to continuously vary the point at which the tube is compressed in the manner of a peristaltic pump. Manual rolling of the wheel away from the capillary tube produces sufficient suction in the tube to cause liquid to be drawn into it. The pumping action is reversible in that rolling the wheel back toward the capillary tube will cause fluid to be expelled. Provision is made to prevent undesirable "compression set" as a result of long term static of the flexible tube during periods of non-use.

Abstract: A coating assembly including a recessed housing for receiving a split coating die, and a thrust block for urging the die against a die closing plate. Aligned passages extending through each of the elements are accessed through a split or slot in the side of each element so that an optical waveguide can be inserted into the apparatus from the side, rather than threaded endwise through the apparatus. Liquid coating material is introduced into the passages, the coating die serving to determine the thickness of the coating which is ultimately formed upon the waveguides.