Abstract: Compressor arrangement having an axial compressor and a radial compressor which are arranged axially one behind the other on a common driveshaft which can be coupled to a drive and which each have a compression fluid input and a compression fluid output. The axial compressor is provided with first control elements and the radial compressor is provided with second control elements. The first control elements and second control elements are controllable separately so that the axial compressor and the radial compressor are controllable separately.

Abstract: An inlet connection piece for an axial compressor, particularly for a turbocompressor, includes an inlet housing (1) in which is arranged a bearing housing (2) with a bearing (3), particularly a radial and/or axial bearing, for a rotor. The bearing housing (2) is connected to the inlet housing (1) by an inlet strut (4) which is connected to the inlet housing in a front cross section. The center of the bearing (3) is arranged axially in the flow direction of a fluid to be compressed behind the area center of the front cross section by at least 0.1-times, particularly at least 0.15-times, particularly at least 0.2-times, particularly at least 0.25-times, the chord length of the front cross section. In addition or alternatively, a fluid passage (5, 6) is formed in the inlet strut (4), and at least portions of this fluid passage (5, 6) form an acute angle with a normal plane relative to the longitudinal axis of the inlet connection piece.

Abstract: Compressor arrangement having an axial compressor and a radial compressor which are arranged axially one behind the other on a common driveshaft which can be coupled to a drive and which each have a compression fluid input and a compression fluid output. The axial compressor is provided with first control elements and the radial compressor is provided with second control elements. The first control elements and second control elements are controllable separately so that the axial compressor and the radial compressor are controllable separately.

Abstract: An inlet connection piece for an axial compressor, particularly for a turbocompressor, includes an inlet housing (1) in which is arranged a bearing housing (2) with a bearing (3), particularly a radial and/or axial bearing, for a rotor. The bearing housing (2) is connected to the inlet housing (1) by an inlet strut (4) which is connected to the inlet housing in a front cross section. The center of the bearing (3) is arranged axially in the flow direction of a fluid to be compressed behind the area center of the front cross section by at least 0.1-times, particularly at least 0.15-times, particularly at least 0.2-times, particularly at least 0.25-times, the chord length of the front cross section. In addition or alternatively, a fluid passage (5, 6) is formed in the inlet strut (4), and at least portions of this fluid passage (5, 6) form an acute angle with a normal plane relative to the longitudinal axis of the inlet connection piece.

Abstract: Moldings which comprise from 30 to 100% by weight of graphite, prepared from graphite powders which comprise from 5 to 100% by weight of rhombohedral crystalline graphite and, if required, contain additives and/or binders, and a process for their preparation and their use as catalyst carriers, heat transfer material, column packing or diluent in catalyst beds.

Abstract: A catalytically active composition for the gas phase oxidation of propylene to acrolein and acrylic acid, of the general formulaMo.sub.12 Bi.sub.0.1-10 Fe.sub.0.8-12 [Co,Ni].sub.0.1-10 P.sub.0-2 A.sub.0-10 B.sub.0.001-1 O.sub.xwhere A is arsenic, antimony, tin, thallium, tungsten, an alkaline earth metal, zinc and/or chromium, B is at least one of the metals sodium, potassium, rubidium, cesium and/or indium and X is the number determined by the atomic valences of the individual elements, is prepared by introducing all or some of the iron and molybdenum in the form of dried pulverulent iron molybdate gel into an aqueous solution or suspension of the other constituents and gelating the mixture by stirring and possibly heating, then comminuting, drying at elevated temperatures and finally calcining.

Abstract: Medicinal white oils and medicinal paraffins are prepared from petroleum fractions containing aromatics and nitrogen, oxygen and sulfur compounds, e.g. light and heavy atmospheric gas oils, vacuum gas oils and residues, which have been pretreated in a first stage by acid treatment or catalytic hydrogenation, by hydrogenation in a second stage over a nickel-containing catalyst under from 50 to 200 bar and at elevated temperatures, by a process in which the catalyst used in the second stage and present in the oxide form is reduced with a hydrogen-containing gas, passivated and then again activated with hydrogen, before the hydrogenation to medicinal white oils or paraffins is carried out.

Abstract: A seed drill has a frame, reservoirs, sowing shares, at least two separate inlets and outlets for two different materials, and a depth-guide or pressure roller behind each sowing share. Variable amounts of one material are conveyed to the forward outlet and of the other material to the rear outlet through separate conductors inside the sowing shares for application of the soil. The outlets are separated along the direction of travel. There is a narrow ripping structure on the forward edge of each sowing share to rip up the soil and produce a furrow. An expansion structure that extends down into the furrow is positioned in the vicinity of the rear outlet of each sowing share. The expansion structure is at least somewhat wider than the ripping structure. The bottom end of the expansion structure is higher than the bottom of the point of the ripping structure.

Abstract: A seed drill for applying seed and/or fertilizer has a frame, reservoir, and sowing shares. The sowing shares are attached to the frame in such a way that they can move in an upright plane by means of superimposed and at least approximately parallel struts on parallelogram mounts. To essentially improve the share mounts, allowing them to be employed on direct-sowing seed drills and especially on soils thickly set with entrenched stones or other obstacles and preventing damage to the shares or share mounts when the shares are laterally overstressed, at least one strut on a parallelogram mount is elastic.

Abstract: A drill for applying seed and fertilizer, with a frame, reservoirs, sowing shares with at least two separate inlets for seed and fertilizer, and a depth-adjustment or pressure roller mounted behind each share, in which the materials to be applied are conveyed in controlled amounts to the shares for application into the soil, in which the shares are connected to the frame with parallelogrammatic mounts and the depth to which the penetrate into the soil can be adjusted by means of a setting device. The drill can be used for zero tillage even on rocky soil to apply seed and fertilizer separately because the sowing share is a chisel share on which a chisel is mounted on the side facing the direction of travel. The chisel share has separate guides for seed and fertilizer inside its body. The outlets for these guides are separated in the direction of travel by a certain distance with the first outlet positioned as close as possible behind the chisel point.

Abstract: A seed drill for outputting seed material and fertilizer, having a frame that supports itself on the soil via runners, at least one supply container unit for seed material and fertilizer, and cultivator, chisel or hoe shares arranged in rows one behind the other and movable in a vertical plane, the materials being conveyed to said shares in adjustable amounts via tubular lines and under gravity for placing into the soil. The shares are guided separately from one another by a depth guidance mechanism for their depth of penetration into the soil.

Abstract: A machine for applying pellets and powder, especially micropellets, to the soil, incorporating, first, a reservoir with outlets, second, ridge wheels that are rotated by a drive shaft at varying rates and the distribute uniform volumes of the material flowing out of the reservoir through the outlets into exit pipes that communicate with a blower and that have outflow openings, and, third, base plates below the ridge wheels. To ensure uniform application of material that tends to clog up the ridge wheels the machine is provided with scrapers that are intended for cleaning the ridge wheels, that engage the depressions between the ridges, which are positioned one after the other in the sense of rotation, and that are appropriately constructed to scrape the depressions out.

Abstract: A seed drill has rotatably mounted opener discs disposed in an acute angle with respect to the direction of travel and mounted on supports. A skid is mounted to each support at the outside surface of the disk at an angle with respect to the direction of travel. Each skid includes a trailing portion configured to have a sliding surface disposed above the depth of penetration of the disk in the ground and a leading portion bent upwardly in the direction of travel and having a recess in the side thereof facing the disk and which extends beyond the forwardmost portion of the disk in the direction of travel.

Abstract: Seed drill (FIG. 2) having share disks 10, and press wheels 27 which determine the depth of penetration of the disks. Runners 13 and disposed on the outer sides of the disks for enabling the soil particles or cohering pieces of soil lifted by the disks to fall back unturned into the seed furrows produced by the disks.

Abstract: A seed drill having single-disk furrow openers 6 set at an acute angle .alpha. to the direction of travel. The total number of furrow-opener disks is divisible by four, and one half of the furrow-opener disks in each transverse row are set at the acute angle (.alpha.) relative to the direction of travel which is directed to one side, and the half are set at an angle .alpha. which is directed to the other side.

Abstract: A centrifugal spreader (FIG. 1) for spreading granulated fertilizers has a funnel-shaped hopper, a discharge outlet in the lower portion of the hopper, and adjustor means for adjusting the size of and shutting off the outlet. A drivable agitator is disposed in the hopper, and spreading means 11 is disposed beneath the hopper for receiving fertilizer issuing from the outlet and spreading the fertilizer. The spreader 11 is releasably mounted on a drive shaft 16 and is exchangeable for a different spreading means. The spreader can be set in a position in which the distance (A) between the highest point of the spreader and the part of the hopper situated above said highest point as seen longitudinally of the drive shaft, is greater than the distance (B) between the lower edge of the fastening means 14 which releasably secures the spreader on the drive shaft, and the upper end of the drive shaft. Thereby removal of the spreader is facilitated.

Abstract: Seed drill (FIG. 1) having furrow openers 10 and accompanying press wheels 12 pivotally arranged on frame 1 by mounting means 3. A spring 18 is interposed between the frame and the furrow openers - press wheels. The bias of the spring can be adjusted by operation of the hydraulic cylinder 20, which can also be used to shift the furrow openers - press wheels between working position and the transport position. An adjusting means 14 is interposed between the frame and the furrow openers - press wheels. By operation of the adjusting means the level of a furrow openers relative to the level of the press wheels can be adjusted. The furrow openers - press wheels are arranged in transverse rows and the furrow openers - press wheels of each transverse row are ganged by shafts 22 so that only one of the mounting means in each transverse row need be outfitted with the spring 18 and hydraulic cylinder 20, and the adjusting means 14.

Abstract: A machine (FIG. 1) for dispensing seed and fertilizers, which is equipped with two hoppers one for the seed, and the other for the fertilizer. The materials flowing from outlet apertures of the hoppers while the machine is in operation are introduced into the soil in controlled amounts through proportioning means, chutes and tubes which discharge into hoes. The proportioning means have a plurality of feed wheels disposed on shafts and are driven by a ground-dependent power source.

Abstract: A mounting device for mounting a spreading machine on a tractor. The device (FIG. 2; a front view) comprises an upright frame 2 outfitted with linkages for connection to the tractor and the spreader and a hydraulic system 20 for adjusting the elevation of the spreader on the mounting device for mid-season spreading of fertilizer. The construction is such that an open area 6 is provided to accommodate pivoting of a drive shaft 8 extending from the power take-off of the tractor to the spreader when the spreader is elevated.

Abstract: A seed drill (FIG. 1 ) having a frame (1 ) with knife hoes (7 ) mounted thereon. The knife hoes are movable in a vertical plane and each has two laterally projecting wings (8 ) bent downwardly toward one another; the outer edges of the wings merge forwardly together to form a point. Each knife hoe has an upright strut (13 ) supporting the leading point of the knife. Further, each knife hoe is disposed on a shank (9 ) which is mounted on the frame with parallel guide means (10 ). The parallel guide means has at least one articulation (19 ) acting in a vertical plane, a stop (21 ) limiting forward swinging movement of the knife hoe about the articulation, and at least one resilient element (22 ) exerting a force on the knife hoe in the direction of the stop. The drill further includes a gauge wheel (16 ) for each knife hoe to limit the depth of penetration of the knife hoe into the soil.