Abstract: A method of production of mono- or multimodal lightwave guides from special substrate glasses of the glass system SiO.sub.2 -B.sub.2 O.sub.3 -Al.sub.2 O.sub.3 - K.sub.2 O-F.sup.-, with partial exchange of the Li.sup.+, Na.sup.+, and/or K.sup.+ ions present in the glass against Cs.sup.+ ions, the substrate glasses having the following compositions (in mol.-%): SiO.sub.2 45-72, B.sub.2 O.sub.3 8-25, Al.sub.2 O.sub.3 1-25, Li.sub.2 O 0-1, Na.sub.2 O 0-2, K.sub.2 O 6-18, MO 0-1 (MO= MgO, CaO, SrO, BaO, ZnO, PbO), in which a portion of the O.sup.- ions present in the glass are replaced by 1-15 mol % F.sup.- ions.

Abstract: A softened section of length of a glass tube is expanded in a dimensionally accurate mold until it has assumed the dimensions of the mold, the mold being made of a material of lower thermal expansion than that of the glass, so that, after cooling, the calibrated section of tube can be released from the mold without any problems. A block of a .alpha.-o glass ceramic with a calibrated mold bore is preferably employed as the mold. It is possible for the first time to avoid a material-removing machining step, which causes damage to the glass surface, yet to be able to produce sections of the tube with a calibrated outside diameter of a dimensional accuracy which could previously be attained only by cylindrical grinding.

Abstract: A carafe made of completely non-metallic parts includes a glass body portion with rim. A plastic edge member is fitted over the rim and secured by adhesive. The plastic edge member has a notch therein which received a projection from a plastic handle which is bonded to the outside surface of the glass body portion.

Abstract: A gob of glass sucked from a glass metal and held in a suction mold (7) is further processed by preshaping the glass in the mold by a punch (4) having a projection (9) for forming in a recess or cavity (14) in the gob in the opening in the mold, and a plate-like surface (10) for forming a plate shaped bead (5) around the opening. This results in a large contact surface against which a blowpipe (1') with a transverse attachment plate (6) having a working surface flush with the end of the bore (3) of the blowpipe is pressed to attach the plate (6) to the bead (5). With this arrangement, the bore cannot become blocked with glass during the pressing operation.

Abstract: A glass having a negative anomalous partial dispersion .DELTA.P.sub.g,F, an index of refraction of n.sub.d .gtoreq.1.67 and an Abbe number of .nu..sub.d >36 has the following composition, in % by weight, 3-11 of SiO.sub.2, 0-3 of GeO.sub.2, .SIGMA. SiO.sub.2 +GeO.sub.2, 4.5-11; B.sub.2 O.sub.3, 29-35; 5-13 of Al.sub.2 O.sub.3 ; 1-3 of ZrO.sub.2 ; 0.2-3 of TiO.sub.2 ; 0.2-1.5 of Ta.sub.2 O.sub.5 ; 30-45 of PbO; 0-3 each of Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O, Cs.sub.2 O, .SIGMA. alkali metal oxide 0-3; 0-3.5 each of MgO, CaO, BaO, SrO, .SIGMA. alkaline-earth oxide 0-6, if .SIGMA. SiO.sub.2 and GeO.sub.2 .gtoreq.9; .SIGMA. alkaline-earth oxide 0-3.5, if .SIGMA. SiO.sub.2 and GeO.sub.2 <9; 0-14 of ZnO, 0-3 of La.sub.2 O.sub.3 ; 0-7 of Nb.sub.2 O.sub.3 ; 0-1 of Sb.sub.2 O.sub.3 ; 0-0.3 of As.sub.2 O.sub.3 ; 0-1.5 of WO.sub.3 ; 0-1 of F. This glass is inexpensive and can be produced in high quality, and has a high crystalization stability and good transmission values.

Abstract: For the immobilization of micro-organisms and animal cells, in particular for anaerobic processes, such as the purification of waste water or for the biotechnological production of nutrition-essential or pharmacological substances, porous, sintered bodies are employed (inorganic carrier bodies). In particular, sintered glass in the form of Raschig rings with a double-pore structure, are employed. They have porosity-determining through-going macropores that permit a free exchange of fluid and gas from the interior of the carrier to the surroundings, and open micropores within the macropore walls, the diameter of the micropores being of the same order of magnitude as the size of the micro-organisms or cells. These carrier bodies typically have an open pore volume of 35% to 85%, 20% to 80% being accounted for by the macropores having a diameter of 20 to 500 .mu.m, and 5%-50% by micropores having a diameter of 1-10 .mu.m.

Abstract: Lead-zinc-borosilicate glass is provided having a boundary wetting angle with respect to ZnO of at most 40.degree., a processing temperature of at most 540.degree. C., a composition, consisting essentially of, in percent by weight on oxide basis, of______________________________________ 4.0-7.0 SiO.sub.2 13.0-17.0 B.sub.2 O.sub.3 43.0-50.0 PbO 24.0-29.0 ZnO 4.0-7.0 CuO 1.5-2.5 Al.sub.2 O.sub.3 ______________________________________and optionally 0-3 SnO.sub.2, Bi.sub.2 O.sub.3 or MoO.sub.3, as well as 0-1 Cr.sub.2 O.sub.3. The glass is particularly suitable for sealing electronic components, especially varistors made of zinc oxide, as well as a sintering aid for zinc oxide ceramics, especially in the production of varistors from zinc oxide.

Abstract: Methods of an apparatus for producing profiled glass tubing utilizing the Danner process comprise flowing the molten glass over profiled blowpipe heads which are "super-profiled" in that the angles of ridges and grooves are more acute than the ridges and grooves resulting in the glass tubing. The particular profiles of the glass tubing are controlled by selecting the necessary drawing speed, viscosity of the glass, internal air pressure at the blowpipe head and throughput rate of the glass melt.

Abstract: In a process for manufacturing fiber reinforced composites made or inorganic sinterable material and inorganic fibers the fibers are continuously passed through a bath which works acccording to the fluidized bed principle and which contains a solution of at least one metal alkoxide of the elements of the first to the fourth main groups of the periodic table and the forth and fifth subgroups of the periodic table, which solution already comprises products of hydrolysis and their condensation products, and the fibers moistened with the solution are wound one upon the other to form layers, the moistened and wound fibers are dried, the metal alkoxides on the fibers are completely hydrolyzed and the products of hydrolysis are polycondensated, and the layers of the fibers being adhered by the powder and the polycondensation products of the products of hydrolysis of the metal alkoxides are hot pressed.

Abstract: Transport carts without internal drive which are bound to rails are moved in a returning system on a transport line from a common main drive. In the end area of the transport line, a secondary drive system is provided so that the transport carts are transferrable along a vertical curve into an inverted position onto a return line which is disposed parallel beneath the transport line and is provided with a second main drive system.

Abstract: Cerium-doped radiation-shielding glasses in the system of SiO.sub.2 -PbO-alkali metal oxides, with a high absorption coefficient for high-energy X-ray and/or gamma- and, respectively, neutron radiation which are resistant to discoloration and exhibit a discharge stability of >5.times.10.sup.8 rad, consist essentially of (in % by weight)______________________________________ SiO.sub.2 35-56 Na.sub.2 O K.sub.2 O 12-21 Cs.sub.2 O PbO.sub.2 24-46 CeO.sub.2 0.5-2.5 CuO + Fe.sub.2 0-0.05; ______________________________________for absorption of neutrons, the isotope Li.sup.6 can furthermore be onctained therein, and SiO.sub.2 can be substituted by B.sub.2 O.sub.3 and/or Gd.sub.2 O.sub.3 in an amount of up to 10% by weight and Gd.sub.2 O.sub.3 is present.

Abstract: The invention relates to a measuring device to measure the oxygen partial pressure, in particular, glass melts, comprising a platinum measuring electrode and a reference electrode arrangement. The reference electrode arrangement is placed in an outer pipe and contains a platinum reference electrode. The electrode protrudes into an oxygen-conducting solid electrolyte, through which an oxygen-containing reference gas flows. For ion-conducting contact with the melt, a rod-shaped contact element of oxygen-ion conducting material is inserted into the open lower end of the outer pipe. This contact element is immersed in the melt. To prevent the inflow of environmental vapors into the measuring space through leaks at this connecting point, the actual measuring arrangement is placed in a liner pipe of oxygen-ion conducting material whose lower end is in ion-conducting contact with the contact element by way of an oxygen-ion conducting powdered material.

Abstract: An electrochromic layer-set, operating with hydrogen, comprises a transparent substrate front face plate, at least two electrodes, at least one electrochromic layer, a hydrogen ion-storing layer, a hydrogen ion-conducting layer, a rear face in sealing relationship with the layer-set, directly following one of the two electrodes, there being a metallic layer between the rear face and the layer lying in front of the rear face (the electrode) or the rear face itself is formed by this metallic layer. The side of the metallic layer turned away from the substrate plate is optionally transformed into the oxide of the metal. For the application of such a metallic layer, the layer-set and a counter-electrode are immersed in an electrolyte containing the metal ions, with the electrode lying at the rear face of the layer-set being made the negative electrode.

Abstract: A catheter for vascular surgery includes a circular array of lightguides disposed at the distal end of the catheter about an inflatable balloon. Upon pressurizing the balloon the diameter of the catheter expands. The lightguides are bunched at the end of the catheter proximate the source of laser light where shutters are positioned for selecting only those lightguides at the distal end which are needed to remove blockages.

Abstract: A plasma or photo-induced chemical vapor deposition coating process and apparatus are provided for applying thin dielectric coatings on planar, curved, and large area substrates. A plasma is generated in a tubular outer conductor. This plasma or the UV radiation occurring in the plasma passes through an opening into a reaction chamber. The opening preferably extends axially along the outer conductor and communicates with the interior of the reaction chamber. At least one component of the reaction gas is introduced directly to the opening or into the reaction gas is introduced directly to the opening or into the reaction chamber adjacent to the opening, bypassing the outer conductor. In this apparatus, the reactive deposition of a coating onto a substrate occurs only in the reaction chamber and below the opening from the outer conductor.

Abstract: For producing a fiberoptic waveguide preforms by plasma pulse-induced chemical vapor deposition (PICVD), blank glass tubes are prepared having a continuously increasing internal diameter in the direction of gas flow. This type of blank compensates for the otherwise occurring decrease in the density of the layer-forming molecules due to pressure drop, thereby permitting the formation of a uniform masswise deposition of layer-forming molecules along the length of the tube. This permits the production of collapsed preforms having a series of coating layers of substantially uniform thickness.

Abstract: Methods of an apparatus for producing profiled glass tubing utilizing the Danner process comprise flowing the molten glass over profiled blowpipe heads which are "super-profiled" in that the angles of ridges and grooves are more acute than the ridges and grooves resulting in the glass tubing. The particular profiles of the glass tubing are controlled by selecting the necessary drawing speed, viscosity of the glass, internal air pressure at the blowpipe head and throughput rate of the glass melt.

Abstract: A process and apparatus are provided for securing a grip element or handle, preferably of plastic, to a crockery or pottery article. An adhesive is injected under pressure into a passage in the grip element and flows to the surface to be joined to the article. The cured adhesive material holds the grip element to the article both adhesively and by means of a mechanical locking action.

Abstract: The invention relates to a glass which is transparent to UV radiation and which, for a thickness of 1 mm and the wavelength of 253.7 nm has a transmission of at least 75%, a linear coefficient of thermal expansion of 3.8.times.10.sup.-6 to 4.5.times.10.sup.-6 K.sup.-1 in the temperature range from 20.degree. to 300.degree. C. and a hydrolytic resistance of <120 .mu.g of Na.sub.2 O/g according to DIN 12 111. The new glass has the synthesis composition, calculated on an oxide basis, of______________________________________ SiO.sub.2 64 to 66.5 percent by weight B.sub.2 O.sub.3 20 to 22.5 percent by weight Al.sub.2 O.sub.3 4 to 6 percent by weight Li.sub.2 O 0.4 to 1 percent by weight Na.sub.2 O 1.0 to 3.5 percent by weight K.sub.2 O 1.0 to 2.5 percent by weight CaO 0.35 to 0.8 percent by weight BaO 0.5 to 2.0 percent by weight F.sup.- 0.5 to 2.0 percent by weight .SIGMA. Li.sub.2 O + Na.sub.2 O + K.sub.2 O 3.8 to 5.5 percent by weight .SIGMA. CaO + BaO 1.0 to 2.5 percent by weight one or more 0.2 to 2.

Abstract: A plasma or photo-induced chemical vapor deposition coating process and apparatus are provided for applying thin dielectric coatings on planar, curved, and large area substrates. A plasma is generated in a tubular outer conductor. This plasma or the UV radiation occurring in the plasma passes through an opening into a reaction chamber. The opening preferably extends axially along the outer conductor and communicates with the interior of the reaction chamber. At least one component of the reaction gas is introduced directly to the opening or into the reaction chamber adjacent to the opening, bypassing the outer conductor. In this apparatus, the reactive deposition of a coating onto a substrate occurs only in the reaction chamber and below the opening from the outer conductor.