Abstract: Method of making a copper alloy to be used as a mold for continuous casting and comprising from 0.05% to 0.4% zinc; from 0.02% to 0.3% magnesium; from 0.02% to 0.2% phosphorus; all percentages by weight; the remainder being copper, and inevitable impurities; the alloy is cast and hot worked possibly followed by quenching and cold working with at least 10% deformation; the alloy is then annealed from 1 to 6 hours at a temperature from 300.degree. to 550.degree. centigrade; and finally cold worked with at least 10% deformation.

Abstract: Continuous casting uses a mold made of copper allow which includes from 0.01% to 0.15% boron, 0.01 to 0.2% magnesium, the remainder being copper as well as manufacture-dependent inpurities and working additives; in addition, at least one additive from the group is used at stated percentages: from 0 to 0.05% silicon, from 0 to 0.5% Ni, from 0 to 0.03% iron, from 0 to 0.03% titanium, from 0 to 0.2% zirconium, from 0 to 0.04% phosphorus, at a total content not exceeding 0.6%, all percentages by weight; the silicon content should be from 0.02% to 0.04%, and the nickel content should be from 0.1 to 0.5%. The mold is made in several working and annealing steps, the last step should be a cold working step with at least 10% deformation.

Abstract: Milling and cutting of curved mold surfaces is controlled by templates, each defining a cam surface to be scanned; one of the templates is pivoted by lateral shift operation of a second template, there being a linkage interposed.

Abstract: In a hollow section of oxygen-free copper deoxidized with boron or lithium, which is to be pressed over a bridge tool, the percentage of the deoxidizing agent, boron or lithium, in the finished product is 0.01% to 0.05%. The electrical conductivity of the finished section is at least 95% IACS.

Abstract: A round copper or copper-alloy tube is internally coated with a relatively thick nickel or nickel-alloy layer and formed into a tube of rectangular or square-shaped cross section; the tube or cut-off sections thereof will serve as molds for continuous casting.

Abstract: A mold for continuous casting has indents, grooves, or recesses in the mold wall itself and/or along one or more edges thereof; wear-proof inserts are fitted into these grooves or indents and fastened thereto by means of electron beam welding along exposed joint lines between the inserts as inserted and border edges of the indents or recesses. The inserts are affixed in this manner along edges for engagement with other mold walls, and/or along the lower edge and/or a level which is expected to coincide with the surface level of the molten steel in the mold.

Abstract: The base material for silance grafting is to be a mixture of at least 50% of a polyolefin (compound A) and of not more than 50% of a different polymer or elastomer serving as property modifier (compound B). The compound A is silane grafted separately or together with compound B. The grafted material is extruded around a conductor or a tube followed by crosslinking in the presence of moisture.

Abstract: Two tube systems, each comprised of two or more concentrically arranged metal tubes, are positively and electrically conductive interconnected through a coupler sleeve system composed of a corresponding number of concentrically arranged coupler sleeves of slightly larger diameter such that ends of the sleeves of the coupler sleeves are threaded upon ends of the tubes of the tube systems to be interconnected.

Abstract: A bevel gear is made by means of a die, a punch, and two concentrical counterpunches, one having a particularly contoured extension. A cylindrical blank, having a diameter not larger than the smallest bevel gear root circle, is inserted in the die; a portion is held by one counterpunch but reverse-extruded in part into the gap between that counterpunch and the advancing punch. A portion of the blank inserted into the interior of the die flows concurrently radially into the small-diameter portion of the die cavity. Subsequently, the reverse-extruded, tubular portion is forced back in parts by the second counterpunch, acting in the gap, to fill the large-diameter portion of the cavity. A tubular shaft extension may remain on the gear.

Abstract: A tube is thermally insulated by helically wrapping a water-repelling spacer around the tube; longitudinally folding a paper ribbon carrying a separating medium around and onto the helical spacer; injecting a foaming material into the tube as it is being formed, and permitting the material to foam inside the folded ribbon; and further permitting the foam to cure and set. Subsequently, the ribbon is peeled off the foam and, preferably, a metal or metalized foil is wrapped around the exposed foam, which is followed by the extrusion of a thermoplastic, synthetic envelope onto the foam.

Abstract: A shrink-fit article is made by extruding a silane-grafted polymer which foams, at least at its surface, and cross-links. Upon completion of foaming and cross-linking, the article is expanded while (still) warm and cooled in the expanded state.

Abstract: The PC-boards are contained in sealed enclosures, and serially effective heat pipe systems conduct thermal energy from the respective sources of development (e.g., power transmitters) to the top and from there to a heat pump system. Stacking such units and operating the heat transfer partially in parallel is disclosed.

Abstract: An apparatus for the corrugation of pipes of plastically deformable material, particularly of cable sheathings of metal, through which the pipe is continuously passed, comprising a corrugator rolling bushing having an inside surface with a deformation rib which is helical (when annular parallel corrugations are to be produced on the pipe) of more than one thread, or with at least one deformation rib acting on successive points viewed in the longitudinal direction of the pipe (when helical corrugations are to be produced in the pipe), the corrugator rolling bushing being supported for free rotation in a rotatable corrugator head, the inside diameter of the corrugator rolling bushing being larger than the diameter of the pipe to be corrugated and the corrugator rolling bushing being supported eccentrically to the pipe.

Abstract: An age-hardening copper alloy is used, alloy components being zirconium, nickel, chromium, cobalt, phosphorus, and beryllium, to make a tubular blank and solution heat-treating same; after a cold-working step, the pre-sized blank is age-hardened at from 400.degree. C. to 600.degree. C. for at least 15 minutes and explosion-formed in order to obtain the desired size, shape, and dimensions.

Abstract: A copper blank is provided with bores, and copper plugs are used to obtain blind bores. The plugs are connected to the blank in a variety of ways and are either placed centrally or at the bore ends; in the latter case, two such elements are interconnected back-to-back, possibly under inclusion of a solid center. In the former case, the plugs are soldered or brazed, preferably during annealing. In either case, a hollow drawing for sizing completes to process.

Abstract: The present invention relates to a dual polarized feed by which two linea polarized waves can be reliably separated. The two waves are conducted separately over high frequency coaxial cables, one of which extends axially and the other radially into the polarizer. Rotation of the planes of polarization is thus unnecessary and the two cables have a minimum influence on the illumination (irradiation) of the reflector.

Abstract: A cable splice, tube joint, or the like, is covered by a fitting constructed as a split hose provided along one edge with a rail made of metal or a strong synthetic; a similar rail element or an integral fastening element is provided on the other edge and secured to the first rail by welding, adhesive bonding, or soldering in order to obtain a joint which resists tension and compression. The hose has been laterally slipped onto and over the cable splice or tube joint and, after the split joint has been sealed (or concurrently therewith), the hose is heat-shrunk. Various rail configurations are shown; a method of making the hose is explained.

Abstract: Several lengths of tubing are interconnected either in advance by welding or brazing, or on-line by hollow plugs, and fed through an annealing furnace, a jacketing station, and a cutter, whereby flushing gas such as air, oxygen-enriched air, or an inert gas are sucked through the respective trailing end. The on-line, end-to-end connection can also be additionally used for tubings as prepared in advance and permits continuous processing, particularly combining process annealing with removal of oil residues.

Abstract: An improved apparatus for extruding an expandable thermoplastic composition onto an elongated article is disclosed comprising an extruder housing; a cylindrical extruder screw axially positioned within an extruder barrel within the housing; a device for heating the expandable thermoplastic composition passing through the hollow chamber; a gas input for supplying an inert gas into the extruder barrel; and a die head attached to the output end of the extruder housing through which an elongated article is passed for the extrusion thereon of the expandable thermoplastic composition.

Abstract: A gas-tight connection is achieved by fusion bonding a flanged end portion of a thin walled, corrugated metallic tube onto a flanged interior surface of a metallic sleeve whose interior surface includes helical threads that correspond to the helical corrugations on the outer surface of the metallic tube. The method disclosed comprises screwing the sleeve onto the tube to a position and orientation whereat the flanged interior surface of the sleeve faces, but is longitudinally separated from, the end portion of the tube to which it is to be bonded. The end portion of the tube is then decorrugated and expanded; a clamping tool is coaxially positioned about such end portion of the tube, a forming mandrel is axially positioned within such end portion, and the clamping tool is tightly closed so as to flange such end portion in a manner to parallel the flanged interior surface of the sleeve.