Abstract: Process for the preparation of benzo-fused heterocycles of general formula I: in which X, R1, R2, R3, R4, R5 and n are as defined in claim 1, by reacting tetrahydrobenzo-fused heterocycles of formula II: in which X, R1, R2, R3, R4, R5, n and Ac are as defined in claim 1, with a catalytic amount of a noble metal catalyst in the presence of a hydrogen acceptor and then deacylating the acylated amino group by the addition of an amine.

Abstract: Process for the preparation of benzo-fused heterocycles of general formula I: 1

Abstract: A pipe profiling machine improves the utilization of the working length of a profiling stone in the inner profiling of heat exchanger pipes. The press-on width of the revolving roller bodies, such as spherical, cylindrical, or barrel-shaped roller bodies, is substantially narrower than the profile width of the profiling stone so that in this area the profiling stone is worn out rapidly while the other area remains unworn. The press-on roller bodies and/or the profiling stone are/is oscillated axially back and forth within the axial working length of the profiling stone so that the entire profile range of the profiling stone can be utilized and so that radially outwardly projecting stripes on the pipes are avoided even if spherical roller bodies are used.

Abstract: A tubular blank formed by casting or extrusion or the like and having a relatively thick wall is prepared for a following drawing operation, such as a tandem or cascade drawing, by widening one end of the tubular blank with a shackled mandrel. Then the widened or distended section is stretched by a cooperative, external stretching action between the shackled mandrel and a draw plate to form a stretched section. Then, the stretched section is passed through a draw plate that may be the same or a different draw plate than the first mentioned draw plate, and then drawing over the shackled mandrel to provide the required reduced wall thickness for the following tandem drawing.

Abstract: The invention relates to a method for the better utilization of the working width of a profiling stone in the inner profiling of heat exchanger pipes. The press on width of the revolving roller bodies is substantially narrower than the profile width of the profiling stone so that in this area the profiling stone is worn out rapidly while the other area remains unworn since it is not utilized. In order to avoid this, the invention suggests that the press on rollers and the profiling stone is moved within the range of the working width of the profiling stone axially back and forth so that the entire profile range of the profiling stone can be utilized.

Abstract: The apparatus for producing mechanical stimulations by vibration of a tappet which is put on a human's skin comprises a measuring head, which on one hand has a housing, in which the back and forward moving tappet is arranged and on the other hand an actuating unit for this tappet. An acceleration sensor is attached to the tappet.

Abstract: The last for a shoe shaft includes a groove which, in cross section, has a generally T-shaped configuration, a profile band mounted in the groove and which, in cross section, also has a generally T-shaped configuration, and a plurality of springs for biasing the profile band such that a stem part thereof is biased towards the mouth of the groove where the inlet portion thereof opens onto the surface of said last, the stem part contacting the shoe shaft opposite where the sealing edges of cooperable lateral mold parts will contact the shoe shaft when molding a sole to the shoe shaft. As a result, sole material is prevented from extruding past the sealing edges of the lateral mold parts onto the upper part of the shoe shaft.

Abstract: Device for centerless grinding of rotation-symmetrical surfaces on workpieces at a grinding station, including drive means for turning a workpiece about the axes of symmetry thereof during grinding, a support bar for supporting the workpiece during turning, a rotatable disc being perpendicular to and disposed on each side of the workpiece generating vibrations of operating frequencies at the grinding station during grinding, at least one of the discs being a grinding wheel operating under grinding pressure, mechanical bearing supports and feed means for the discs forming an oscillating system with the discs generating resonance frequencies, and rigid connecting means for forming a rigid linkage of forces between the bearing supports and for increasing the resonance frequencies of the oscillating system beyond the operating frequencies.

Abstract: Method for straightening elongated drawn round stock, which includes simultaneously advancing the stock in the longitudinal direction, rotating the stock about the longitudinal axis thereof and deflecting the stock from a straight line exceeding the yield point thereof in a straightening arc, and subjecting the surface of the stock to friction forces acting in the longitudinal direction during the deflection.

Abstract: Arc cutting device with a revolving electrode forming an intermittent arc includes a revolving narrow disc having a peripheral edge, part of which is electrically alive for forming the arc, and part of which is electrically dead for mechanically carrying away material that is to be removed from a cutting groove formed in a workpiece being cut by the arc.

Abstract: Method of grinding elongated, cylindrical workpieces in continuous operat in a grinding machine wherein the workpieces are advanced while they are rotated about their longitudinal axes includes exerting an oscillating grinding pressure transversely to the longitudinal axis of the workpiece, and adjusting the frequency of the oscillations to lie substantially in low-to-medium frequency range, outside the frequency ranges of resonant vibrations of parts of the workpiece and of the grinding machine; and device for carrying out the foregoing method.

Abstract: Method of grinding elongated, cylindrical workpieces in continuous operat in a grinding machine wherein the workpieces are advanced while they are rotated about their longitudinal axes includes exerting an oscillating grinding pressure transversely to the longitudinal axis of the workpiece, and adjusting the frequency of the oscillations to lie substantially in low-to-medium frequency range, outside the frequency ranges of resonant vibrations of parts of the workpiece and of the grinding machine; and device for carrying out the foregoing method.

Abstract: Method of controlling with heightened accuracy a processing machine driven t different operating speeds and having a machine part moving through a predetermined full range, the processing machine, at an initial setting of the moving machine part, within a given tolerance range, repeatedly permitting start-up of a processing cycle that has been instituted in advance through a precontrolled time period dependent upon the operating speed and which includes a control commencement build-up time period and a full range displacement time period, which includes interposing a blocking time period between the control commencement build-up time period and the full range displacement time period, the blocking time period always ending at the same position in the displacement range of the moving machine part, blocking the full range displacement by the moving machine part until the end of the blocking time period, and advancing the start of the control commencement build-up time period in accordance with the blocking time

Abstract: Parting device for severing a traveling elongated material into predetermined lengths, including track means, a tool slide carrying a parting tool and mounted on said track means for traveling thereon in a direction parallel to a path along which the elongated material travels past the parting device, the tool slide being displaceable at a speed in synchronism with that of the traveling elongated material as a predetermined length is being severed from the elongated material by the parting tool and being displaceable back to a starting position after the predetermined length has been severed, control means for initiating the foregoing displacements of the tool slide, reversible, flexibly yielding drive means ever actuatable for the severing operation and capable of imparting a travel speed to the tool slide greater than the synchronized speed without braking the tool slide, a member traveling at a speed continously in synchronism with the travel speed of the elongated material, and over-running clutch means i

Abstract: Method of controlling with heightened accuracy a processing machine driven t different operating speeds and having a machine part moving through a predetermined full range, the processing machine, at an initial setting of the moving machine part, within a given tolerance range, repeatedly permitting start-up of a processing cycle that has been instituted in advance through a precontrolled time period dependent upon the operating speed and which includes a control commencement build-up time period and a full range displacement time period, which includes interposing a blocking time period between the control commencement build-up time period and the full range displacement time period, the blocking time period always ending at the same position in the displacement range of the moving machine part, blocking the full range displacement by the moving machine part until the end of the blocking time period, and advancing the start of the control commencement build-up time period in accordance with the blocking time