Abstract: Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.

Abstract: A process for the production of thermoplastic polyurethane elastomer is disclosed. The process entails (a) introducing and homogeneously mixing in a first static mixer (A) an isocyanate and (B) a mixture of compounds having an average of 1.8 to 3.0 Zerewitinoff active hydrogen atoms having a molecular weight of 400 to 10000 with and chain extenders having an average of 1.8 to 3.0 Zerewitinoff active hydrogen atoms and a molecular weight of 62 to 400 and optional auxiliaries to form a substantially unreacted mixture and (b) reacting said substantially unreacted mixture in a second static mixer to form thermoplastic polyurethane elastomer. The elastomer thus produced has improved mechanical properties and is suitable for the production of moldings.

Abstract: The invention relates to a process for preparing 2-(4-trifluoromethoxyphenyl)ethylamine in an advantageous manner by

Abstract: The present invention relates to evenly substituted polysaccharide derivatives having the general structure: polysaccharide—O—R wherein polysaccharide—O represents a substituted or unsubstituted polysaccharide unit and R is a substituent of a polysaccharide-OH group having either the structure R=—A—B— or the structure R=—B—, wherein A is a linear polyether chain having the following structure: A=(—D—O—)n wherein D denotes a linear aliphatic branched or unbranched chain having 2 to 12 C atoms, O represents an oxygen atom and n is a number equal to or greater than 1, and B represents a substituted carbamic acid having the structure wherein E denotes a linear or branched aliphatic chain having 1 to 18 C atoms.

Abstract: In order to increase the long-term stability of the exhaust catalyst of an internal combustion engine, the exhaust gas is purified with respect to volatile phosphorus compounds before entering the catalyst.

Abstract: An illuminated optical magnifying device with an optical focusing unit that can produce a magnified image of an object to be observed and with an illumination device whose light is at least partially applicable for illuminating the object to be observed, whereby the illumination device is composed of at least one luminous diode, which is arranged in the magnifying device in such a way that its light can emerge from the magnifying device essentially straight toward the direction of the object to be observed.

Abstract: A variable-pitch boat propeller has a hub rotatable about a hub axis, a plurality of vanes rotatable on the hub and extending generally radially of the hub axis, and an adjustment element rotatable on the hub about the hub axis and connected to the vanes for pivoting the vanes on the hub. An adjustment knob is pivotal on the hub about the hub axis and interengaging formations on the knob and hub limit angular displacement of the knob on the hub between a pair of end positions so that a limited range of adjustment of the vanes is possible with the knob. The interengaging formations include an axially open groove having a pair of ends constituting abutments and an axially projecting screw head and rotationally fixed relative to the hub and received in the groove. The groove is formed in the knob and the screw head is carried on a yoke rotationally coupled to the hub. The groove is arcuate, centered on the hub axis, and has an arc length of substantially less than 360°.

Abstract: The present invention relates to novel thermoplastic materials based on polysaccharide ethers which are simultaneously substituted by carboxylic acid ester groups and carbamate groups, together with mixtures of such derivatives with low molecular weight aliphatic urea derivatives.

Abstract: A variable-pitch boat propeller has a hub centered on and rotatable about a hub axis and formed with a radially out-wardly open pocket having a predetermined inside diameter and centered on a vane axis extending generally radially of the hub axis and a mounting plate rotatable in the pocket about the vane axis and having an outer face. A ring fixed in the pocket and having inner and outer peripheries bears radially inward of the hub axis on the mounting plate. An inner seal is provided between the inner ring periphery and the plate and an outer seal between the outer ring periphery and the pocket. A vane extending along the vane axis has a base of an outside diameter smaller than the inside diameter of the pocket and fitting in the pocket on the face of the plate. A screw or the like releasably secures the vane base to the plate face, and mechanism pivots the plate in the pocket about the vane axis.

Abstract: The invention relates to a cutting device for products, in particular for cutting up foodstuffs. A blade driven by a drive shaft so as to rotate is provided which orbits a further drive shaft in a planetary path-like manner on a rotor driven by the further drive shaft. For a compact arrangement it is provided that the one drive shaft is designed as a hollow shaft and that the other drive shaft is guided therein.

Abstract: A SAW duplexer having an impedance transformation network in a form of a series capacitance in at least one filter path.

Abstract: The invention relates to a hand-lever control for motor and sport boats with a hand lever having a handle and guided in at least one function plane for controlling the engine. In order to facilitate maneuvering for the pilot, the hand lever or its handle is pivotal about the axis of the hand lever in two directions against a spring force and at least one sensor detecting this rotation is provided whose output controls a steering system.

Abstract: A boat propeller has a housing adapted to be fixed to a boat, a hub rotatable about a main axis on the housing, a plurality of generally radially projecting vanes pivotable on the hub, and an operating core shaft coaxially received in the hub, rotatable about the main axis but axially nondisplaceable relative thereto, and having a rear end projecting axially from the hub and a front end. A yoke is fixed to the rear core-shaft end and respective rods fixed to the yoke are connected to the vanes for pivoting the vanes on angular movement of the core shaft about the main axis. A cylinder axially fixed in the housing at the front core-shaft end holds an axially displaceable piston. A nut element having a nonbinding internal screwthread is threaded on a screw element. One of the elements is axially coupled to the piston and the other of the elements is axially coupled to the core-shaft front end.

Abstract: In an instrumentation for the production of fixing surfaces for fixing a knee joint endoprosthesis to the femoral condyle that is adjacent to the knee, and to the tibial head, provision is made for a rotary milling head, which is fixable in relation to the longitudinal axis of the femur and tibia, respectively, by fastening means and which, in relation to this longitudinal axis, is angularly adjustable in a stable stop position by being pivoted, defining milling planes, and which is displaceable in the set milling plane, covering same and working as a face milling cutter or as a cylindrical milling cutter.

Abstract: A boat drive having a variable-speed engine connected through a clutch to a variable-pitch propeller has a control having a housing and a guide on the housing defining a central crosswise track having a travel end and a start end, forward and backward travel tracks extending from the travel end, and a forward start track extending from the start end. A lever pivoted on the housing is movable in the tracks of the guide. A pitch controller connected to the propeller includes a position detector operable by the lever when in the travel end and travel tracks for increasing propeller pitch positively on movement of the lever forward from the travel end in the forward travel track and negatively on movement of the lever backward from the travel end in the backward track and for setting the propeller at 0° pitch when the lever is in the travel end.

Abstract: The present invention relates to evenly substituted polysaccharide derivatives having the general structure:

Abstract: The present invention relates to a process for preparing leather by (I) tanning a pelt with (a) an aldehyde, or (b) a bisulphite-blocked polyisocyanate; (II) optionally, retanning the pelt with (a) a polyaspartic acid, a salt of a polyaspartic acid, a polyaspartic acid anhydride, or a mixture thereof, and/or (b) a polyaspartamide; (III) dressing the resultant product by (a) bottoming the product with a polyurethane and one or more natural bottoming assistants, and (b) applying a polyurethane and/or polyesteramide finish; and (IV) optionally, aftertreating the resultant dressed leather with a leather preservative.

Abstract: Fluorine-containing phenethylamines are obtained in an advantageous manner by reacting fluorine-containing bromobenzenes with acrylamide in the presence of a palladium catalyst, hydrogenating the resulting arylacrylamides catalytically and then rearranging the arylamides obtained. The invention also embraces novel arylacrylamides and novel arylamides.

Abstract: A boat drive has a housing, a tube shaft rotatable in the housing about a shaft axis and having axially opposite front and rear ends, a hub carried on the shaft rear end, and a plurality of radially projecting vanes pivotal on the hub. An axially shiftable core shaft extending coaxially in the tube shaft has a rear end rearward of the tube-shaft rear end and a front end forward of the tube-shaft front end. Mechanism connecting the core-shaft rear end with the vanes pivots the vanes on the hub on axial displacement of the core shaft. A pair of oppositely directed axial-thrust bearings on the core-shaft front end are contained in and surrounded by a hollow piston having front and rear faces axially flanking the thrust bearings. A cylinder fixed in the housing and surrounding the piston forms with the respective faces thereof front and rear compartments so that pressurization of the front compartment shifts the core shaft rearward and pressurization of the rear compartment shifts the core shaft forward.

Abstract: A reactance filter, particularly in a branching circuit (ladder type),with surface wave resonators wherein omission weighted normal finger transducers are employed between reflectors such that the arrangement and plurality of the active fingers of the interdigital transducer are particularly formed for changing the capacitance relationship (static to dynamic capacitance) such that a narrow filter bandwidth is achieved.