Abstract: A method of treating an exhaust gas containing SO.sub.2 and HF which is characterized by using an absorbing liquid containing CaCO.sub.3 and Ca(OH).sub.2 as absorbents to be fed to an absorption tower for the exhaust gas, circulating the absorbing liquid from a second slurry tank to the absorption tower, from the absorption tower to a first slurry tank, and from the first flurry tank to the second slurry tank, introducing Ca(OH).sub.2 into the second slurry tank to keep the pH value of the absorbing liquid in the second slurry tank in the range of 5.5-7.0, and blowing air into the absorbing liquid in the first slurry tank.

Abstract: A fine adjustment device for turning tool bits in the form of a pneumatic/hydraulic converter for converting of control signals into proportional actuating or adjusting forces with a combination of an oil pump and pneumatically controlled overflow valve, whose outlet pressure is adjustable with the help of control air.

Abstract: In the discontinuous manufacture of multilayer, co-extruded, hose-like thermoplastics material preforms used in the production of large volume multilayer hollow members in a divided blow mold, at least two different annular shaped material melts are brought together in series within an axially extending annular piston to form a multilayer material melt. An annular flow channel in the piston receives the layers of material melt. The flow channel widens in a funnel-like manner toward an annular storage space. The preform is subsequently ejected from the storage space through an annular nozzle gap by the annular piston moving in its axial direction. The annular piston acts as a co-extrusion head and is pressed upward by the multilayer material melts. In supplying the material melts from extruders into the flow channel of the piston, the material melts flow first in the extrusion direction and then are redirected for flow radially inwardly into the flow channel of the piston.

Abstract: A stereophonic binaural recording and reproduction method for audio signals presented to headsets. Signals of the left stereo channel are supplied to the left ear, weighted with the outer ear transmission function of the left ear for the angle range of between 0.degree. to 45.degree. to the left of the median plane, and to the right ear, weighted with the outer ear transmission function of the right ear for the same angle range. Additionally, time-delayed signals of the left stereo channel are supplied to the right ear, weighted with the outer ear transmission function of this ear for the opposite angle range, wherein the delay is markedly outside of the time range of the sum localization and of the audible echo. The signals of the right stereo channel are supplied to the right and left ear in the same manner but mirror-inverted relative to the median plane.

Abstract: A round container which is intended for dispatch in the empty state possesses a side wall and at least one closure wall, sealingly and firmly inset into the side wall at an angle to it, which closure wall is for example a base. The side wall consists at least partly of a transparent sheet part having a thickness of 130 to 500 .mu.m. To enable a part of the side wall to be printed in an appealing form and the intrinsic stiffness of the round container to be improved in spite of the viewing facility provided, the edge of the side wall towards the closure wall is formed, around the periphery, at least partly as cardboard part from a cardboard material having a weight per unit area of at least 150 g/m.sup.2, sheet part and cardboard part not overlapping each other in a partial region serving as viewing opening.

Abstract: Polyoxyalkylene-polysiloxane block copolymers are disclosed which exhibit an outstanding defoaming action and have the special advantage of not causing wetting defects when dispersions defoamed therewith are applied on a 2-dimensional substrate. Dispersions of polymeric organic substances, especially dispersions of vehicles, coating agents and adhesives are defoamed by the addition of 0.01 to 2.0% by weight, based on the dispersion to be defoamed, of a polyoxyalkylene-polysiloxane block copolymer of the formula,R.sup.1 O--A--[B--A--].sub.m R.sup.1whereinA is a polyoxyalkylene block with the average formula C.sub.n H.sub.2n O--)y, in which n has a value of 2.8 to 4.0 and y a value of 15 to 100,B is a polysiloxane block of the average formula, ##STR1## wherein the R.sup.2 groups are the same or different and represent an alkyl group with 1 to 4 carbon atoms or a phenyl group, with the proviso that at least 90% of the R.sup.2 groups are methyl groups and x has a value of 10 to 100,R.sup.

Abstract: A liquid preparation for the production of electrically conductive and infrared-reflecting, fluorine-doped tin oxide layers on glass or glass-ceramic surfaces is disclosed. The preparation has a content of tin-IV-chlorides, which optionally comprise organic groups. The preparation contains also tin-II-fluoroborate as the sole doping agent. A preferred preparation comprises30 to 89% by weight of tin-IV chloride, which optionally comprise organic groups,0.5 to 7.5% by weight of tin-II fluoroborate in the form of a 30 to 60% by weight aqueous solution and10 to 62.5% by weight of a polar organic solvent.The inventive preparation is procedurally simple to handle and contains no chemically aggressive or toxic compounds. The components of the preparation are easily accessible, cognate and inexpensive chemicals, yet permit high-grade surface layers to be produced on glass or glass-ceramic. A method for forming the layers is also disclosed.

Abstract: Multilayer adhesive label which is shrinkable on a circumferential surface of a body, particularly of a dry-cell battery, including a carrier layer for an outwardly visible imprint which is covered with a transparent protective layer, whose outermost layer is formed by means of an at least axially stretched, transparent laminated foil of shrinkable plastics material. The carrier layer may have at least one cut in the vicinity of its edge extending along the generating line of the circumferential surface of the body.

Abstract: A hand-held tool for driving a cutting or grinding disk includes a housing and a protection hood with a sleeve-shaped extension detachable connected to the housing. A receptacle is mounted on the housing for releaseably holding the sleeve-shaped extension. The receptacle is formed as a slotted sleeve so that it has a variable diameter. The diameter is changed by moving circumferential ends of the sleeve toward or away from one another. The displacement of the sleeve ends can be effected by a lever pivotly mounted on the ends.

Abstract: A method for grinding the running and/or guide surfaces of rails or the like, where the running surfaces are ground by an endless revolving abrasive belt which can be moved against the running surfaces, wherein the abrasive belt revolves transversely to the longitudinal axis of the rail and embraces, at least partially with prestress, the running and/or guide surfaces. An apparatus for performing the method includes a mobile grinding machine, which an endless abrasive belt, guided at least on one rail of the track, which abrasive belt revolves over a drive roller and a reversal arranged at a distance therefrom and which can be moved by these against the surfaces of the rail to be ground. The reversal is formed of two reversing rollers which have a comparatively small spacing from each other, that the axes of the reversing rollers and of the drive roller 19 being arranged to be parallel to the longitudinal axis of the rail.

Abstract: A ventilating system for a garbage container. The container includes a vessel for receiving wastes and a cover. The receiving vessel has walls which are at least over portions thereof provided with air passage openings. An air-permeable intermediate wall is arranged spaced above the vessel bottom for carrying the waste. The intermediate wall is a grate with meshes formed by grate members. The meshes have a width which is substantially greater than the width of the grate members. The walls of the receiving vessel define air inlet openings in the region of the grate. Additional ventilation openings are provided in the walls underneath the opening of the receiving vessel. Spacer members for the wastes are provided on the inner surfaces of the walls of the receiving vessel at least over the portion of the walls which extends vertically above the grate. The cover is provided with air discharge openings.

Abstract: During monitoring of the driveline of an agricultural implement in respect of overloading and the degree of loading, from a first occurrence of slip, the slip revolutions occurring during a measuring cycle are added up. If the number of slip revolutions exceeds a permissible number of slip revolutions, a signal is generated indicating an overloading condition, a new measuring cycle beginning upon release of the signal to be able to take into account the effects resulting from a change in the behavior of the tractor driver, the nature of the signal being changed responsive to the speed differential between the input speed and output speed of a friction coupling permitting relative rotation.

Abstract: An automatic object image follow-up device includes a setting circuit for shiftably setting a follow-up field; an extracting circuit for extracting a feature of an object in relation to the follow-up field; a store for storing the extracted feature; a detecting circuit for detecting a relative shift between the object and the device on the basis of the feature of the object extracted by the extracting circuit and the feature stored by the store; and a shifting circuit for shifting the follow-up field following up the object according to the relative shift.

Abstract: A mounting or carrier for data communications units configured as hand-held units suitable for heavy duty in a motor vehicle, and which permits simple handling of the hand-held units and affords a high functional security as far as the line connection and attachment is concerned. A head pin or lug is mounted to a flange surface on the carrier or support, which engages a keyhole-like aperture in the hand-held unit. A flexibly supported guidance part projects from a console molded at the carrier and cooperates with a recess in the hand-held unit. The electrical line connection points of the carrier are shielded by the guidance part when no hand-held unit is present thereon, and the guidance part additionally functions for actuating a switch.

Abstract: In order to achieve an ergonomically and medically correct sitting position for the surgeon in every working position, the surgeon's chair is constructed in such a way that an adaptation to the frequently changing position of the surgeon is possible, for which purpose a vertically adjustable and horizontally displaceable seat is mounted on a column with a detachable backrest and with articulated arms with armrests arranged lattery to the seat and transferrable into various angular positions, in which chair the articulated arms are transferrable into optimal angles of inclination by means of two hinges and, over and above that, are transferrable as far as into the lateral area of the backrest when a sitting position facing the backrest has to be assumed.

Abstract: A device for the stereophonic recording of sound events by means of two microphones arranged with essentially oppositely directed orientation and mounted in replicas of the human head. The microphones are mounted in the replicas of the outer auditory meatus. The replica of the human head is limited to the replicas of the pinnae with the outer auditory meatus. Microphones with unilateral pickup effect are used and are mounted preferably in positions corresponding to the positions of the pinna openings in human heads. The microphones operate in the low-frequency range of up to approximately 1500 Hz as directional microphones and, in the frequency range above approximately 1500 Hz, operate with spectral resolution of the outer ear transmission function. The device according to the present invention provides compatibility of headset reproduction and loudspeaker reproduction.

Abstract: A method of injecting a hardenable mass into cracks in a structure includes drilling a borehole into the structure traversing the cracks. Inserting a tubular member into the borehole with the tubular member having an outside diameter smaller than the diameter of the borehole. Filling the gap between the borehole surface and the tubular member with a hardenable mass forming a seal of the gap at the opening into the borehole. After the seal has hardened, injecting a hardenable mass into the tubular member so that it flows into the borehole and enters into the cracks in the structure.

Abstract: In a process for making tools from medium and high alloy steels or stellites by superplastic precision forming a powder metallurgically produced starting material with an equiaxed structure and more than 30% by volume of carbidic and/or boridic precipitated phase of particle size 1 to 0.2 .mu.m is given a matrix grain size of 1 to 3 .mu.m by thermomechanical processing (hot forming) and formed in the superplastic state.

Abstract: An apparatus for transporting plastic bottles which have a support collar near the opening. The bottles are suspended by the support collars on a guide track. Compressed air nozzle ducts are arranged on both sides of the bottles underneath the support collars. The air nozzle ducts have a nozzle surface in which at least one row of compressed air nozzles directed in the direction of movement of the bottles are arranged. At least one additional row of nozzles is provided whose effective direction of flow is obliquely and/or perpendicularly upwardly.