Abstract: A conventional rolling or crushing mill is provided with a fixed roller and an adjustable roller carried in a pivotable support to allow adjustment of the size of a nip formed between the rollers. Adjustment of the nip dimension is accomplished by operatively connecting the pivotable support between an upper and a lower threaded nut carried on a pivotably mounted threaded rod. Between the connection between the pivotable roller support and the lower nut is a hydraulically actuated cylinder into which is introduced a hydraulic fluid at a selected pressure from a supply to maintain the support against the upper nut under pressure and thereby maintain the adjustable roller under a like pressure during the crushing operation. If a foreign object becomes engaged in the nip, whereby the crushing pressure is exceeded, the size of the nip increases forcing fluid from the cylinder and into an accumulator connected in the supply so as to allow the foreign object to pass without unduly damaging the rollers.

Abstract: A process of smelting a sulphidic copper ore concentrate comprising introducing and partially roasting the sulphidic copper ore concentrate in a whirling layer roasting furnace, separating hot roasting gases from the roasting furnace, mixing enrichment oxygen with the roasting gases, joining and mixing into a smelting flame combustible gaseous fuel and the oxygen enriched separated hot roasting gases, directing the smelting flame from one side of a reverberatory furnace over the top of a copper matte, continuously passing the partially roasted concentrate from the roasting furnace through the heating zone in the reverberatory furnace and there smelting the partially roasted ore and heating the copper matte by the heat from the flame, generating in the heating zone by virtue of the flame an oxidizing atmosphere of such high temperature and oxygen content that sulphur from the molten sulphidic copper is converted into an exhaust gas of high SO.sub.

Abstract: Method and apparatus for the thermal refinement of contaminated copper in the molten phase wherein superimposed molten phases are formed in a treating vessel, the lower being the copper bearing material and the upper phase containing slag, and reactive gases are simultaneously injected into each of the molten phases.

Abstract: A tractor-implement arrangement for establishing a frictional connection between the power take-off shaft of a tractor and a Cardan shaft for the drive of a movable implement by an automatic coupling of members respectivaly connected to the power take-off shaft and the Cardan shaft. The implement is connected to the tractor by means of automatically interengaging coupling members or elements while one and/or the other coupling element of the power take-off or Cardan shaft is axially displaceable while being spring urged. The Cardan shaft is supported by suitable holding means and is liftable by a lifting device. The Cardan shaft is moved first by guiding the same along an inclined plane toward the take-off shaft and is frictionally coupled thereto whereupon the implement is mounted on the tractor by interengagement of additional coupling members.

Abstract: A fuel injection valve having nozzle bores which are inclined with respect to the axis of the valve. The nozzle bores are similar to Laval nozzles. An auxiliary bore is provided in the axial extension of the nozzle bore to be prepared in the nozzle body for machining the nozzle bore. This bore is sealed by means of a pressed in, soldered, or electron beam welded stopper.

Abstract: A method and mechanism for calcining cement wherein the material is preheated in a precalcining zone and a vertical conduit leads heated discharge gases upwardly from a main calcining furnace, a supply of fuel and a supply of oxygen is fed to a preoxidation zone beneath the precalcining zone and raw material is fed into an admixing area above the burner with a deflector preventing particles from falling down into the preoxidation zone with the fuel being partially oxidized so that controlled heating and controlled oxidation occurs in the precalcining zone.

Abstract: Method and apparatus for classifying articles of varying size from a stream of particulate material in which the stream is subjected to centrifugal forces to provide an annular dispersion, and a stream of air is directed substantially perpendicular through the dispersion to aid in separating the fines from the coarser particles.

Abstract: The invention relates to a method for the operation of an instrument subjected to a radiation, which is protected from the harmful influence of the radiation by means of an auxiliary medium and/or swinging in of a protective shield between source of radiation and instrument.The invention relates further to an apparatus for carrying out this method.

Abstract: A process and mechanism for thermally treating fine ground material for the calcining of cement in stages which passes finely ground calcareous and argillaceous material into a vertical chamber to enter a deacidifying zone, supplying fuel to the vertical chamber with a supply of oxygen so that the fuel is partially oxidized prior to mixing with the material and the fuel, oxygen and material are supplied so that the material is deacidified in the range of 50% to 80%, passing exhaust gases from a kiln into the deacidifying zone, and passing material from the deacidifying zone through a cyclone separator to separate the gases and deliver the preheated material to the kiln for completion of the burning process.

Abstract: A method and apparatus for drying wet granular and/or lumpy materials, employs a chamber having a material inlet, a material discharge outlet, an inlet for a heated drying fluid and a vapor outlet. A perforate sieve-type material support extends along a path between the material inlet and the material discharge outlet to provide communication between the drying fluid and vapor outlet through the material and a microwave generating and transmitting device is located above the material path to irradiate the material with microwave energy as a part of the drying energy supplied to the material.

Abstract: Gas samples are extracted from a rotary cement kiln type furnace in the area of raw material input and exhaust gas discharge from and to, respectively, a cyclone heat exchanger. The intervening chamber is provided with a door covering a passageway into the chamber through which a gas probe, carried by a gas pick-up device, is extended and retracted. The pick-up device is movably mounted in a guide and is provided with a coolant and apparatus for directing a blast of air to clean the probe immediately prior to withdrawal from the furnace. Emergency controls are provided to sequentially clean the probe, withdraw the probe and close the door for the passageway in response to detection of an adverse condition in at least one operating parameter of the system.

Abstract: A control system for gas turbines with a gas generator which comprises a compressor, a combustion chamber, and a compressor turbine, with a power take-off device and a thrust device arranged past said gas generator and adjustable as to through-put preferably in the form of an efficiency turbine provided with an adjustale guide wheel, with a thrust nozzle variable with regard to its cross section or with an adjustable propeller, and with a fuel metering valve the metering cross section of which in influenced by values of condition of state of the gas generator. As values of condition of state for the adjustment of the fuel metering valve there are selected the temperature at the entrance into the combustion chamber or at the exit of the compressor, or the pressure in front of the compressor turbine, or a setting member of a speed governor of the gas generator which adjusting member is adapted to be influenced at will.

Abstract: The method and mechanism for thermally treating a slurry of material such as a magnesite hydrate wherein a kiln housing has an upper chamber portion and a lower chamber portion with spray nozzles in the roof of the upper chamber for directing a spray of slurry downwardly and a rotor with arms in the lower portion and separators forming a plurality of tiers in the lower portion with heated gases directed tangentially into the chamber at the base of the upper portion and additional gases directed into the lower portion with the heat treated material being drawn from the base of the chamber and evaporated moisture withdrawn from the top of the chamber, and dust separated from the moisture and reintroduced into the chamber.

Abstract: A change gear transmission, especially for use in agriculture and construction, which includes a shift stage which is shiftable by means of a shift member through the intervention of an axially displaceable shift fork. The shift fork is mounted on a shift rod which is directly or indirectly journalled in the transmission housing. In or on the transmission housing there is journalled a counter shaft or auxiliary shaft which is parallel to an input or output shaft of the transmission. The shift rod associated with the shift fork is arranged coaxially with regard to the counter or auxiliary shaft.

Abstract: A method and mechanism for thermally processing lateritic nickel ore wherein the ore is fed through a seal, fed to a series of preheater cyclones arranged to discharge to a burner chamber with a tangential burner and the burner chamber is connected to discharge to a reduction chamber which is fed reduction gases through a water cooled supporting grate, and the still combustible reduction gases passed upwardly to the burner chamber and then through an after burner chamber whereupon the gases enter the preheater chamber to supply heat for preheating the ore to reduction temperature.

Abstract: A pressure system for a transmission, especially for an auxiliary gearbox for driving auxiliary devices in aircraft, according to which atmospheric air is conveyed into the transmission by a pump which draws in the air through an inlet pressure chamber and a check valve until a sufficient pressure has been obtained in the transmission. When the pressure in the transmission surpasses that desired, the excess air is returned to the inlet pressure chamber.

Abstract: A geared tranmsission in group arrangement, especially for motor driven agricultural and construction vehicles in which an input shaft is adapted via a selectively operable friction clutch to be connected to a source of driving power, such as an engine. An output shaft adapted for connection to a load is coaxially arranged with the input shaft. A countershaft parallel to the output shaft is geared directly to the input shaft while gear trains extending between the countershaft and output shaft are under the control of friction clutches on the countershaft. The gear of the gear train on the countershaft are rotatable thereon and the gear of the gear train on the output shaft are nonrotatable thereon. The gear of the gear drive from the input shaft to the countershaft which is on the countershaft includes bolts for the mechanical coupling thereof to the adjacent gear of the gear train which is rotatable on the countershaft.

Abstract: A magnetic separator includes a channel, having a plurality of walls, one of which includes a vertically traveling conveyor belt; a magnetic coil is arranged on one channel wall for producing a high intensity magnetic field; inlet means is provided for introducing a carrier medium into the channel and an injecting means on a side channel wall opposite the magnetic coil and downstream of the inlet charges material into the medium. A doctoring member removes magnetic particles drawn to the conveyor belt and means spaced from said one wall removes non-magnetic particles and carrier medium.

Abstract: A method and apparatus for centrifugal separation of hot materials such as molten metals and slag including feeding the metal and slag mixture into a rotational separator drum having a center inlet at one end and coaxial outlets at the other end, a burner shell within the center of the drum chamber having radial outlet holes and a burner therein with the flame gases flowing outwardly through the radial outlet holes and over the surface of the material being separated heating the material and the flame gases being conducted out the outlet end for continual circulation.

Abstract: Apparatus for separating solid substances from a stream of gas employing vertical deflecting plates extending parallel to one another but arranged inclined to the direction of gas flow. The deflecting plates are provided with open collecting grooves and with a fluidizing layer of gas on the outer surfaces thereof.