Abstract: A combination normal-sowing and fine-sowing wheel for a sowing machine, which has a fine-sowing wheel which can be attached to a sowing shaft by an interlocking and clamping connection and is mounted next to a normal-sowing wheel as a separate component in a sowing housing on the same sowing shaft. The fine-sowing wheel is coupled to the normal sowing-wheel by a coupling bolt that can be secured in two operating positions by stops and both the normal sowing wheel and the fine sowing wheel have a central bore and another bore the accommodates the coupling bolt. The stop in accordance with the present invention is in one piece.

Abstract: A tractor-powered cultivator with powered cultivating tools, with a trailing roller behind the tools, and with upright baffles that extend at least approximately along the direction of travel, that are positioned laterally next to the outer tools to block the clods of earth thrown to the side by the tools, and that can be raised up and down along with the roller. To provide universally applicable lateral baffles for various types of cultivator, the baffles are fastened to the frame of the roller.

Abstract: A method and device for optically counting small particles, like grains of seed and fertilizer and other materials employed in agriculture. The particles to be counted travel past a test field, interrupting as they do so a beam of light between a light emitter and a light detector. To make it possible to detect even several particles in the test field at the same time and to make the counting generally more precise, individual points where the path of a beam of light is interrupted by particles passing through the grid are detected in sequential scanning cycles by beams of light that create an optical grid and are retained in the form of information describing one or more particles, information describing the particles and obtained in different scanning cycles are compared, and counting signals that correspond to the number of individual particles passing through are derived from the variations in the interrupting points determined during the comparison.

Abstract: Method of counting particles of seed, fertilizer, and other materials employed in agriculture acoustically. The particles to be counted are conveyed against an impact plate in such a way as to start it oscillating, generating electric signals that are processed to determine the number of particles. In order to count the exact number of individual particles passing a test point with relatively high precision and by acoustical means, at least one definite oscillation amplitude that is characteristic of the impact of one particle is determined and stored and a comparable actual oscillation amplitude is determined as the particles strike against the impact plate, is compared with the stored oscillation amplitude, and, if it is shorter than the characteristic amplitude, one particle counted, or, if it is higher than the characteristic amplitude, the inference made that another particle has struck the plate.

Abstract: Mechanism for discharging granular material, especially seed and fertilizer, and having a bin and seed-flow regulators that variable amounts of material can be supplied to the ground through, whereby a sensor that detects the amount of material or number of grains of material discharged through that device is positioned in the vicinity of at least one flow regulator. To improve the sensor's detection of the amount or number of grains of material, a flow accelerator (8) accelerates the grains (22) of material toward the sensor (15) between the flow regulator and the sensor (FIG. 1).

Abstract: High-temperature protection layer of an alloy with a base of aluminum, chromium and nickel, particularly for structural gas-turbine elements of an austenitic material. The base material of the alloy contains at least 8 to 12 atom % aluminum and 28 to 28 atom % chromium with the remainder nickel, and at least silicon and titanium are admixed to the base material as additives such that at a temperature below 900.degree. C., a passive cover layer of chromium oxide, and at a temperature above 900.degree. C., a passive cover layer of aluminum oxide is developed on the applied alloy.

Abstract: An agricultural machine with a frame on which tool rotors are mounted on upright shafts in a row extending across the direction in which the machine travels. The rotors are driven by a horizontal driveshaft that is segmented and interlocked by couplings. Each segment of the driveshaft is a component of one of the angular gears that drive the tool rotors. The horizontal driveshaft is coupled, through a coupling device that is inside the housing of a main train mounted on the frame, with the output gearwheel of the main train and hence driven by it. Guides for aligning the central axis of the components of the driveshaft with the center line of the output gearwheel of the main train are positioned in a known way at least between the main train and the gears of a tool rotor that are immediately adjacent to it. The coupling device has a coupling component that is rigidly attached to the components of the driveshaft that extend into the main train.

Abstract: Electrochemical storage cell, particularly of the alkali metal and sulfur type having at least one storage cell with insulation around the cell to minimize heat loss, and an interspace between the cell and the insulation. A heat exchanger in the form of a closed hollow body is partially filled with a vaporizable medium. The heat exchanger has two heat exchange zones in open communication. A first heat exchange zone is disposed in the interspace for preventing overheating of the cell by vaporization of the cell contained therein. The second heat exchange zone is disposed adjacent means for absorbing heat to condense vapors of medium which flow from the first heat exchange zone to the second heat exchange zone.

Abstract: A gas-tight, high-frequency permeable window arrangement is provided between the input and output sides of a coaxial line, particularly for traveling wave tubes. The dielectric losses, particularly given high-performance tubes, are held so low that too high a thermal load and, thus, a fracture or, respectively, loss of seal of the window arrangement is avoided. For this purpose, a ceramic hollow cylinder is provided between the coaxial line of the input side and the coaxial line of the output side, the ceramic hollow cylinders surrounding the inner conductor of the coaxial line of the input side in the area of its transition to the coaxial line of the output side as a continuation of the outer conductor of the coaxial line of the input side.

Abstract: An arrangement for suppressing interference waves and harmonic waves in traveling wave tubes has a short circuit slide in an output wave guide in which the slide has a groove in the form of a .lambda./4 or .lambda./2 wave guide element in its frontal surface which is the effective short circuit plane. The groove has an attenuation element arranged therein.

Abstract: A gas-tight, high-frequency permeable window arrangement in a coaxial line, particularly for traveling wave tubes, has a large pass band width as well as being mechanically and thermally stable. For this purpose, a hollow cylinder of dielectric material is provided between the coaxial line on the input side and the coaxial line on the output side, the hollow cylinder surrounding the inner conductor of the coaxial line on the input side and being connected with its one end face to the outer conductor of the coaxial line on the input side and being connected with its other end face to a flange which is arranged between the inner conductors of the coaxial lines of the input and output sides. A window arrangement constructed in accordance with the present invention is particularly suitable for employment in radio link traveling wave tubes.

Abstract: A traveling wave tube has a helix or ring-bridge delay line arranged within a vacuum envelope and a plurality of dielectric holding rods parallel to each other for supporting the delay line. The vacuum envelope has an axial longitudinal groove intermediate between two holding rods, and a pressure element located within the groove presses, by way of a tension plate, the holding rods against receiving surfaces provided in the interior of the vacuum envelope, whereby the holding rods are in good mechanical and heat-conducting relationship with the envelope.

Abstract: Electrochemical storage battery normally operating at an elevated temperature, surrounded by heat insulation to retard heat loss. The surrounding heat insulation is an enclosed gastight cavity under subatmospheric pressure to impede heat flow by convection, and a radiation shield in the interior of the cavity in the path of heat flow to reduce heat loss by radiation.

Abstract: A delay line for transit time amplifier tubes which has a filter characteristic with a negative dispersion in the fundamental wave of the longest pass band, i.e.

Abstract: A travelling-wave tube with improved heat dissipation characteristics, having a helical delay line disposed between an electron-beam generating system and an electron-beam receiver, with the helical delay line being supported by a plurality of retaining members, at least one of which is made out of a material different from the remaining members, the latter being made out of quartz and the first mentioned member being made of a material that has a better heat conducting capacity than the quartz rods, at least in radial direction, and has a dielectric constant that does not differ sufficiently from that of quartz to materially effect the gain of the tube or dispersion curve of the signal wave.

Abstract: A cultivating machine (FIG. 1) having a frame (1) for mounting of the machine on a tractor, and having arms (34) on which angle drives (6) for the cultivating tools (26) are mounted, resiliently joined thereto by way of arms (29) and connectors (33, 35, 36). A transverse shaft (7), by way of bevel gears, drives the tool holders (24) for rotation of the tools (26). The transverse shaft directly drives output shafts to which the tool holders are connected.

Abstract: A delay line for traveling wave tubes, in particular for the amplification of mm waves, has a wave guide which is provided with outward-leading transverse walls each of which has a central electron beam opening and at least one coupling opening and which form a line cell with the adjacent transverse wall. The delay line contains two portions having a different constant delay for the line wave, where the delay of the front line portion, considered in the direction of the electron beam, is lower than the delay of the rear line portion. A transition section is arranged between these two portions for matching and comprises a single matching cell in which at least one of the two transverse walls of the matching cell carries at least one matching pin which projects into the interior of the cell.

Abstract: A delay line for travelling-wave tubes, comprising a hollow guide with successive transversely disposed discs having elongated attenuation members which project into the interior of the hollow wave guide, with the longitudinal axes of such attenuation members extending at least approximately parallel to the longitudinal axis of the delay line and mechanically firmly supported in recesses in the transverse discs. The attenuation members are retained by a press or force fit with the transverse discs, and may be provided in the portion thereof surrounded by the associated transverse disc with at least one notch which extends transversely to the longitudinal axes of the members and which is at least partially filled with the ductile material of such associated transverse disc.

Abstract: A delay line for traveling-wave tubes, particularly a wideband low-reflection attenuated line for millimeter waves, in the form of a hollow guide having successive transverse walls which define successive line cells, each of such walls having a central opening for the passage of the electron beam and at least one coupling opening, elongated attentuating members being disposed in the respective cells with their longitudinal axes extending parallel to the longitudinal axis of the delay line. The attenuating members are of like effective length and the matching cell lying immediately ahead of and/or behind the attenuating section of the tube contains, in each case, at least one matching member.

Abstract: A planting machine having a driven agitator mechanism (7) in the seed hopper (10) which has outlet openings (3) for the seeds, is provided with a magazine (12) disposed over the agitator mechanism (7) for holding seed disinfectant. The magazine (12) has outlet openings (15) and is equipped with a stirring mechanism (16).