Abstract: A mobile track renewal installation for the continuous replacement of the rails and ties of a track comprises a leading and a trailing work vehicle arranged for continuous advancement on a track in an operating direction. The leading work vehicle bridges an intermediate renewal section where an existing track is replaced by a new track and carries a ballast excavating and planing apparatus for removing ballast from the ballast bed and planing the remaining ballast bed, and an apparatus for laying ties on the planed ballast immediately behind the ballast excavating and planing apparatus, in the operating direction. The trailing work vehicle carries apparatus for fastening rails to the laid ties and an operating unit for lifting the track and for tamping the ballast under the ties trailing the apparatus for fastening the rails to the laid ties, the operating unit being intermittently displaceable on the trailing vehicle in the operating direction.

Abstract: An end-forming machine tool comprises a machine bed (1), which carries workpiece-gripping means (2) and at least one headstock (3), which is guided for a displacement along the axis of the workpiece relative to the workpiece-gripping means. In order to permit efficient forming operations to be performed within a short time and to achieve a high precision and high surface finish in conjunction with long edge lives of the tools, the machine bed (1) is provided with a milling unit (4), which is disposed between the workpiece-gripping means (2) and the headstock (3) and is displaceable along the axis of the workpiece. The milling unit (4) is provided with an internally cutting annular inserted-tooth cutter, which is adapted to be driven and rotatably mounted in a tool slide (7), which is movable transversely to the axial direction of the workpiece.

Abstract: A combine harvester is provided which comprises a housing (1) and a concave (3), which is adjustably mounted in the housing below a threshing drum (2). To permit a simple change of the mesh size of the concave, the concave (3) consists of a frame (9), which is movably mounted in the housing, and a replaceable insert (10), which is adapted to be slidably extracted from and inserted into the frame (9) through a lateral opening (13) of the housing in a direction which is parallel to the axis of the threshing drum (2).

Abstract: A mobile apparatus for loading, transporting and laying an assembled track section comprises a self-propelled main vehicle comprising an elongated carrier frame, a pair of transversely aligned flanged wheels at each end thereof for engagement with, and support on, the rails of the assembled track section, a pair of lifting jacks at each carrier frame end associated with the flanged wheels, and a device for gripping the track section rails associated with each flanged wheel and associated lifting jack, the lifting jack being placeable on the track bed and operable to lift the carrier frame and flanged wheels with the assembled track section gripped by the rail gripping devices off the track bed, and an auxiliary self-propelled vehicle movable independently of the main vehicle and comprising a flatbed frame capable of receiving and supporting the carrier frame and flanged wheels of the main vehicle with the assembled track section gripped by the rail gripping devices, a track-bound undercarriage with flanged wh

Abstract: A sealing composition suitable for sealing alumina packages for integrated circuits at a temperature below about 450.degree. C. for a short time of about 10 minutes. The composition is a mixture of 50-80 wt % vitreous PbO-B.sub.2 O.sub.3 solder glass powder having a deformation point of 350.degree. C. or less, 0-45 wt % low thermal expansion ceramic powder and 2-40 wt % zircon powder. The zircon powder is of a synthetic zircon artificially prepared to eliminate radioactive impurities such as uranium and/or thorium and contains 0.5-7 wt % Fe.sub.2 O.sub.3, MnO and/or ZnO without alkali impurities and without non-reacted zirconium oxide. The composition has an improved flowability.

Abstract: A heat exchanger comprises a cylinder and a bundle of heat exchange tubes passing through its interior heat exchange chamber for receiving a hot fluid to be cooled while circulating through the tubes from an inlet to an outlet end.

Abstract: A welding apparatus for producing at least two spaced welding seams for welding together overlapping ends of two lengths of thermoplastic synthetic resin sheets at a welding station, comprises a frame, a heating device arranged on the frame ahead of the welding station in an operating direction and being displaceable in this direction. The heating device includes at least two spaced welding wedges and a separate heating element arranged in each one of the welding wedges, each heating element being independently thermostatically controllable.

Abstract: The invention specifies a method and a device for supplying assembly parts which adhere to or entangle with each other. Individual assembly parts are extracted from an unsorted quantity of assembly parts in a separating or singling operation. These are aligned in a predetermined position and delivered to a delivery point. A partial quantity of separated or singled assembly parts aligned in a predetermined position is formed during a scooping operation. The assembly parts of this partial quantity are extracted singly and in aligned form.

Abstract: Coal gasifiers for the production of reducing gas are protected--at least in parts--by a refractory lining of unburned, carbonaceous magnesia bricks having a carbon content of 5 to 30 percent by weight. The component of these magnesia bricks consisting of sinter and/or fused magnesia suitably has a Fe.sub.2 O.sub.3 content below 6 percent by weight, preferably below 1.5 percent by weight, and a SiO.sub.2 content below 3 percent by weight, preferably below 1 percent by weight.

Abstract: A stone saw comprises a revolving sawing rope, a backing roller supporting the revolving sawing rope at each end of a sawing portion on one side of the sawing rope axis against cutting pressure exerted upon the sawing rope, the cutting pressure causing radial wear on the backing rollers, a feed drive for feeding the sawing rope in a revolving direction over the backing rollers, and housings supporting the backing rollers and pivotally adjustable about the sawing rope axis in dependence on the revolving direction of the sawing rope, the backing rollers being mounted in the housings transversely adjustably to the axes thereof and to the sawing rope axis. A clearance sensor is associated with, and radially spaced from, the backing roller for detecting the clearance between the sensor and the backing roller, the distance varying with the radial wear of the backing roller, the clearance sensor emitting a control signal corresponding to the detected clearance.

Abstract: In apparatus for flanging sheet metal blanks, a holding-down mechanism comprises a holding-down ram (3) and a holding-down shoe (4), which comprises a plurality of displaceable segments (6), which are mounted on said ram for a displacement along a track, which is carried by the ram (3) and parallel to the line of bend. The displaceable segments are displaceable along said track by adjusting rod means (17). To permit the displaceable segments to be displaced in a simple manner, each displaceable segment (6) has associated therewith a coupling (19) for non-displaceably connecting each displaceable segment (6) to an associated adjusting rod (17) and to the holding-down ram (3) in alternation.

Abstract: In a production plant comprising a conveyor line at which each station comprises a machine table for optional reception of devices such as guiding, positioning, arresting, feed, sensor or coding devices, the machine tables, feed devices, guide devices, positioning and arresting device and coding device are constructed as mutually interchangeable modules which may be releasably coupled in desired work stations. The work stations are formed at tables comprising conveying, deflector or manual work station modules equipped with reception devices for the device modules and the coupling members for the station modules are arranged and constructed in the same manner.As a result the station module may be interchanged and it is possible to set up or change production plant with facility. The station modules are formed of substantially identical parts releasably assembled.

Abstract: A SiO.sub.2 13 B.sub.2 O.sub.3 fiber glass composition is disclosed which contains a reduced amount of B.sub.2 O.sub.3 in comparison with conventional D glass to thereby improve the water resistance and heat resistance. The fiber glass composition of the present invention has a dielectric constant of 4.5 or less for 1 MHz at the room temperature, a strain point of 485.degree. C. or more, and improved water resistance. The composition consists essentially of, by weight SiO.sub.2 70-80%, Al.sub.2 O.sub.3 0-2.0%, B.sub.2 O.sub.3 15.0-21.5%, MgO 0-1.0%, CaO 0-2.0%, Li.sub.2 O 0-2.0%, Na.sub.2 O 0-3.0%, and K.sub.2 O 0-3.0%, Li.sub.2 O+Na.sub.2 O+K.sub.2 O=2.0-5.0%.

Abstract: A mobile ballast cleaning machine comprises a machine frame supporting a ballast excavating and conveying chain, a screening installation and a cleaned ballast redistributing apparatus arranged to receive the cleaned ballast from the screening installation and to redistribute the cleaned ballast at a ballast discharge site behind the ballast excavating site. A cleaned ballast compacting device is arranged at the ballast discharge site, the compacting device comprising a plate-shaped compacting beam extending below the track and transversely thereto to the ballast discharge site, the compacting beam having opposite ends projecting beyond the track, a carrier post supporting each compacting beam end on the machine frame, and a drive connected to each carrier post for continuously reciprocating the compacting beam in a plane extending substantially parallel to the track whereby the cleaned ballast is compacted at the discharge site in a direction opposite to the operating direction.

Abstract: An apparatus for preparing stacks of armature disks, which comprises a guide track receiving and guiding successive disks in a direction perpendicular thereto to form a stack, a drive arranged to push against one of the stack ends to advance the stack in this direction along the guide track, an abutment arranged to stop the opposite end of the stack driven thereagainst by the drive, and a device for removing a predetermined portion of the stack adjacent the opposite end.

Abstract: A probe for extracting a hot gas sample comprises an inner tube for conducting the hot gas sample and a cooling jacket surrounding the inner tube. A heating element surrounds the inner tube and the heated inner tube is shielded from the cooling jacket by an interposed heat insulation.

Abstract: In a pedal crank mechanism at least one curved coupling spring is provided for resiliently coupling the pedal crank and the sprocket wheel and is resiliently backed by at least one backing member carried by the sprocket wheel or by the pedal crank. The curved coupling spring engages the backing member at retaining means which are carried by the sprocket wheel or by the pedal crank, or at a point spaced from said retaining means. From the zone in which said coupling spring is backed by the backing member, the coupling spring extends so as to progressively increase its radial distance from the backing surface of the backing member.

Abstract: Bright electrodeposits of zinc/iron alloys onto iron of good ductility and adhesion are obtained at low electroplating voltage and high current yield by using a bath containing zinc sulfate, ferrous sulfate, conductive salt, citric acid and alkali metal acetate and, as additional ingredients, saccharin, a naphthalene mono-, -di- or -trisulfonate or a condensation product thereof with formaldehyde and/or an organic complexing agent for iron and further one or more compounds selected from the group consisting of alkali metal cumene sulfonate, alkali metal benzoate, collagen hydrolyzate having a mean molecular weight of from 500 to 2000 and a reducing agent for ferric irons selected from the group consisting of alkali metal bisulfite, alkali metal dithionite and hydroxy ammonium chloride.