Abstract: A feeder for supplying fibers to an apparatus for forming a preliminary web having a holding shaft, to be supplied with fibers from above through a conveying line, and a distributor, which is disposed between the holding shaft and the conveyor line and serves to distribute the arriving stream of fibers over the width of the shaft. In order to ensure an undisturbed distribution of fibers, the distributor has at least two distributing lines, which open into the holding shaft and are connected to the conveying line in alternation by a change-over valve.

Abstract: In an exhaust system, particularly for two-stroke cycle internal combustion engines, at least that portion which adjoins the internal combustion engine consists of two joined shell sections made of sheet metal and contains a catalytic converter. In order to simplify the manufacture and to ensure that the gas dynamics will not adversely be affected, the catalytic converter is constituted by a central partition, which extends between the sheet metal shell sections in the direction of flow of the exhaust gases and is provided with a catalytic coating and is optionally apertured.

Abstract: An exhaust system for two-stroke cycle internal combustion engines comprises a diffuser, which is adapted to be connected to the internal combustion engine, a baffle, which is provided downstream of the diffuser, a catalytic converter, which is disposed between said diffuser and said baffle, and a diffuser discharge pipe, which extends in said diffuser and is much smaller in diameter than the largest diameter of the exhaust system. In order to ensure that the catalytic converter will be lighted off quickly and that the gas dynamics will not adversely be affected to an appreciable degree, the diffuser discharge pipe extends from a location adjacent to the exhaust gas outlet of the cylinder and the inlet of the diffuser to the catalytic converter and merges by means of a steep funnel into the catalytic converter.

Abstract: A scale member is provided with a scale, which can be optoelectronically scanned. In association with that scale, a scanning unit is provided, which comprises scanning sets for generating measured-value signals, and an evaluating unit is provided for deriving digital countable signals from said measured-value signals. A reference track comprising a plurality of reference marks is provided on the scale member and is parallel to the scale and the scanning unit comprises scanning sets for scanning the reference track. A control circuit is provided, which permits a generation or delivery of reference pulses only in response to the scanning of selected ones of the reference marks. To permit such selection, the scale member is provided with a control track, which can be scanned by the same method as the scale and the reference marks and which has a signal-generating characteristic which varies along the scale so that a signals have different levels are generated by an associated scanning set.

Abstract: A mobile track leveling, lining and tamping machine comprises four ballast tamping units mounted between the undercarriages of the machine and immediately preceding the rear undercarriage in the operating direction. The ballast tamping units are mounted for independent transverse and vertical adjustment with respect to the machine frame by power drives, a respective one of the ballast tamping units being arranged at the gage side and the field side of each rail, and each ballast tamping unit comprising a pair of vibratory tamping tools reciprocable in the direction of the track and immersible in the ballast with a respective one of the ties positioned between the tamping tools.

Abstract: The invention relates to the dry run-high pressure stage of a multistage piston compressor with a piston designed as a tappet (2) guided in the high pressure cylinder (1) and sealed against the compression space of the cylinder (1) by means of self-lubricating sealing elements (3) forming an annular gap together with the working surface, whereby the latter is formed by a material suitable for dry run. According to the invention, the sealing elements having a height conforming at least to their diameter are embodied in the form of at least two cylindrical sealing elements (3), which are loosely placed one on top of the other in the cylinder (1) on the free end of the tappet (2), provided with working surface guides at least in part areas, and have chamfers (6) on the face side.

Abstract: Flat work pieces can be rationally and carefully removed from a substrate to which they adhere with an apparatus which comprises a pickup table, a receiving table spaced from the pickup table, and a vertically adjustable tool carrier movable between the tables. The tool carrier carries a pickup device comprising a pressure platen configurated to conform to the flat work piece and having opposite ends, an adhesive strip extending over the pressure platen between the ends thereof, two guide rollers respectively recessed from the opposite ends of the pressure platen, the guide rollers being arranged to guide the adhesive strip under tension over the pressure platen, and two reeling drums receiving respective ends of the adhesive strip beyond the guide rollers and rotatable to displace the adhesive strip in an operating direction by reeling the adhesive strip on one of the drums and unreeling the same from the other drum.

Abstract: Refractory, gas-permeable bubbling plugs for a vessel containing a molten metal have a cold end remote from the molten metal and a hot end facing the molten metal. The hot plug end is subject to wear by the heat radiated from the molten metal to leave a remaining plug size after wear, and such plugs comprise at least one measuring probe displaying the remaining plug size. According to the invention, the measuring probe comprises a small tube having a tip extending into the plug and spaced a predetermined distance from the cold plug end, and an end section protruding from the cold plug end, a wire movably mounted within the small tube, a spring preloading the wire, a connection connecting an end of the wire to the tip of the small tube and detachable by the effect of the radiated heat, and an optical display unit attached to the wire in the protruding end section of the measuring probe tube.

Abstract: A universal mobile track leveling, lining and tamping machine useful for work in track switches and tangent track comprises four ballast tamping units mounted between the undercarriages of the machine and immediately preceding the rear undercarriage in the operating direction. The ballast tamping units are mounted for independent transverse and vertical adjustment with respect to the machine frame, a respective one of the ballast tamping units being arranged at the gage side and the field side of each rail, and each ballast tamping unit comprising a pair of vibratory tamping tools reciprocable in the direction of the track and immersible in the ballast with a respective one of the ties positioned between the tamping tools. Each unit is independently vertically adjustable on an independent vertical guide and independently transversely adjustable on at least one transverse guide.

Abstract: A system for handling workpieces comprises a carrier frame and a gripper device secured to the carrier frame and actuatable to grip a respective workpiece. The gripper device comprises a housing including a cylindrical housing member and a bearer head adjoining one end of the cylindrical housing member and carrying a gripper, and an operating device for the gripper arranged in the housing member. The handling system further comprises a bearing for the cylindrical housing member, which has a surface configuration designed to enable the housing member to fit the bearing and to be held thereby, and a coupling device cooperating with the bearing head and holding the bearing head non-rotatably with respect to the bearing.

Abstract: The incremental measuring system comprises a scale member with an incremental scale and a scanning unit comprising scanning sets for generating analog measured-value signals in response to the scanning of the scale. The system also comprises an evaluating unit for deriving digital countable signals from the analog measured-value signals and for generating a reference pulse. At least one pair of reference marks are spaced along the scale on a carrier releasably fixed to the scale member. The scanning unit comprises a reference mark scanning set to scan the reference marks and connected to the evaluating unit. A reference point which registers with a selected increment of the scale is disposed on the carrier between the reference marks of the pair and can be defined by the distances from the reference point to the reference marks, and these distances are stored in a memory.

Abstract: A process for recovering copper from cupric ion containing aqueous solutions which comprises adding to the aqueous solution containing cupric ions an amount of reducing agent which corresponds from 0.1 to 10 moles of reducing agent per mole cupric ion, and heating the reaction mixture in the absence of oxygen in a closed vessel to a temperature of from 170.degree. to 240.degree. C., said reducing agent being one or more members of the group consisting of:(a) organic aldehydes RCHO (R=H, C.sub.1 to C.sub.5 alkyl)(b) carboxylic acids R COOH (R=H, linear or branched C.sub.1 to C.sub.5 alkyl)(c) hydroxycarboxylic acids R.sub.1 COOH (R.sub.1 =HO(CH.sub.2).sub.n, CH.sub.3 CH(OH)--, CH.sub.3 (CH.sub.2).sub.n, CH(OH)-- with n=1 to 3)(d) dicarboxylic acids R.sub.2 COOH (R.sub.2 =HOOC(CH.sub.2).sub.n with n=1 to 3)(e) amino acids R.sub.3 COOH (R.sub.3 =CH.sub.3 (CH.sub.m CH(NH.sub.2)-- (CH.sub.3).sub.2 (CH).sub.m CH(NH.sub.2 -- with m=1 to 3, CH.sub.3.CH(OH)(NH.sub.2), HOO C.CH(NH.sub.2).(CH.sub.2).sub.

Abstract: A machine for cutting vegetable material, such as a mowing or chopping machine, comprises at least one rotatable tool carrier and tools pivotally mounted on said tool carrier by pins which are parallel to the axis of rotation of the tool carrier. In order to provide a machine which has a robust structure and facilitates the mounting and removal of the tools, each pin carries at least one tool and at opposite ends is movably mounted in two slots, which extend radially with respect to the axis of the rotation of the tool carrier and are formed either in two opposite disks, which constitute the tool carrier, or in lugs, which are secured to and radially protrude from the body of the tool carrier. Each slot has a radially outer portion provided on the outside with a cover for preventing an axial displacement of the associated pin.

Abstract: An incremental measuring system comprises a scale member provided in one track with a measuring scale, and an optoelectronic scanning unit for generating measured-valve signals in response to a scanning of the scale. The scale member is provided in an additional track with two or more reference marks and the scanning unit is operable to scan the reference marks and to generate reference signals in response to the scanning of the additional track at one or more selectable reference points provided with such reference marks. The scale member and the scanning unit are encapsulated in an enclosure, which is formed with a slot, which is covered by a seal. An actuating member for the scanning unit extends through the slot past the seal. Covers for covering at least part of the reference marks are provided and are adapted to be inserted and/or removed into and from the enclosure or shifted along the tracks by a positioning member, which extend through apertures formed in the enclosure.

Abstract: The testing head of an apparatus for determining the permeability of a web to air comprises two rotatable parallel contact rollers, which are mounted between two end walls and comprise a rubber-elastic sheath each, and two sealing belts, which are trained around said contact rollers at both ends thereof and adjacent to their outer edges are provided with a sealing lip, which contacts the adjacent end wall. An endless covering belt is trained around reversing pulleys so that a suction space which is provided between the contact rollers and serves to suck a stream of measuring air through the web is closed at the top.

Abstract: A welding machine for butt welding of plastic profiles is outfitted with profile clamping units (2, 3) capable of sliding in relation to each other, and a heat reflector (15) which can be introduced between the front surfaces of two profiles to be welded, whereby the clamping units (2, 3) comprise weld boundary blades (2b, 2f, 3b, 3f) aligned parallel to the profile front surfaces and mounted on the profiles.In order to enhance welding efficiency and produce precisely coordinated weld joints, the clamping units (2, 3) are designed to accommodate two superimposed profiles (U, O), and feature in addition to the external boundary blades (2b, 2f, 3b, 3f) an intermediate boundary blade (5, 6) insertable between the profiles (U, O), yielding elastically in the clamping direction of the profiles and moving along with the clamping units (2, 3) in the direction of displacement.

Abstract: In a drawer which is provided with guide means consisting of drawer rails and corpus rails, the side walls consist of side members (2), which are provided with the drawer rails (5). A front plate (1) of the drawer is secured by retaining angle members (19, 20), which have legs (19), which extend parallel to the side members and are adjustable in height by means of eccentrics (23).

Abstract: Substrates for use in liquidus crystal display devices using thin film transistors, solar cells electroluminescence display devices and/or other devices having a thin film formed on the substrate are formed of a glass. The glass is essentially free from alkali metal oxide, lead oxide, and magnesium oxide, and has a high chemical resistance. The glass consists essentially, by weight, of 52-60% SiO.sub.2, 7-14% Al.sub.2 O.sub.3, 3-12% B.sub.2 O.sub.3, 3-13% CaO, 10-22% BaO, 0-10% SrO, 0-10% ZnO.

Abstract: A mobile track working machine comprises a machine frame, operating tools adjustably mounted on the machine frame, drives for adjusting the operating tools into various operating positions and into an inoperative position with respect to the track rails, controls for the drives for adjusting the operating tools into the various operating positions and into the inoperative position, and an apparatus for automatically controlling the positions of the operating tools. The apparatus includes sensors for monitoring the transverse position of the track rails and obstacles along the track, generators for output signals indicating respective ones of the monitored transverse position of the track rails and of obstacles along the track, and transmitters for transmitting the output signals to the drive controls whereby the operating tools are adjusted into the respective positions in response to the output signals.

Abstract: The tablet dispenser comprises a drawer, which is adapted to be extracted into engagement with a stop from one end of a tubular protective housing and in its extracted position is adapted to be supplied with a columnlike stack of tablets. The tablets can be advanced as far as to an ejector, which is mounted on that portion of the drawer which protrudes from the protective housing. The ejector is operable to eject each tablet transversely to the longitudinal direction of the stack while the tablet is guided between spaced apart side guides. The side guides consist of clamping holders, which protrude beyond the end of the tubular protective housing and which receive one tablet at a time. Each tablet can be pushed between the clamping holders in that the drawer is raised. The drawer is provided near its bottom end with a foot for supporting the tablet stack. A tilting of the tablets in the housing is prevented by longitidinal guides.