Abstract: Novel polyurethanes are prepared by reacting(a) an organic diisocyanate of formula ##STR1## wherein M represents --CH.dbd.CH--; --N.dbd.N--; --CH.dbd.N--; ##STR2## or and where R.sub.1 through R.sub.4 may be the same or different and represent hydrogen, halogen, CN, CF.sub.3 or saturated aliphatic C.sub.1 -C.sub.12 alkyl residues which may be interrupted by ether hydrogen atoms with(b) compounds of molecular weights of from between 400 and 10,000 and which contain at least two active hydrogen atoms reactive toward isocyanate groups.

Abstract: A sealing arrangement for roll bearings in skin pass mill stands in which the roll neck has a tapered portion extending between the end face of the roll and a portion of the roll neck which is provided with a neck sleeve and is supported in a bearing bushing in the bearing housing. An annular, flexible sealing member constructed in one piece and reinforced by means of an annular wire rope or strip is slid onto the tapered portion of the roll neck and rests on the tapered portion with annular sealing projections. An outer annular end of at least one of two axially spaced radially extending, elastic annular ribs can be placed in elastic frictional contact with at least one annular sealing surface which is rigidly connected to the lid of a housing and is arranged laterally of an annular flange rigidly connected to the housing. The second annular rib on the side of the roll is a rib stump whose circumference has the shape of a truncated cone. The rib stump has a sharp tear-off edge facing the annular flange.

Abstract: A process for the preparation of cefodizime of the formula ##STR1## wherein (a) a compound of the formula II (ATS) ##STR2## wherein R.sub.1 represents hydrogen or an aminoprotective group and A represents a hydrogen atom or one equivalent of an alkali metal or alkaline earth metal, of ammonium or of an organic nitrogen base, is first reacted with a compound of the formula IIIR--SO.sub.2 Halwherein R represents an optionally substituted alkyl, aryl or aralkyl radical and Hal represents a halogen atom, in an organic solvent and, if appropriate, in the presence of a base,(b) a compound of the formula I (TACS) ##STR3## in which A has the above meaning, is reacted with a silylating agent in an organic solvent and, if appropriate, in the presence of a base, and(c) the two products formed in (a) and (b) are reacted in their reaction solutions, and any protective group R.sub.1 present in the end product of the formula I is eliminated.

Abstract: Plateletlike pigments based on iron oxide and having a spinel structure of the composition:Mn.sub.u Al.sub.v Fe.sub.[3-(u+v)]-z O.sub.4-z,whereu is from 0.01-0.09,v is from 0-0.3 andz is from 0-1.The pigments can be used for producing decorative coatings, in particular in paints, plastics, prints and cosmetics, for producing electromagnetic screens, as substrates for coatings and as pigments having magnetic properties.

Abstract: An optical network, particularly fashioned as a homodyne or heterodyne receiver wherein a local oscillator (2) of an optical homodyne or heterodyne receiver comprising an optical wave guide network (1) is isolated from generally anisotropic reflections from the network (1) in order to preserve the stability and tunability of the oscillator (2) and a polarization filter (10), a polarization converter (11) and a phase shifter (12) are successively arranged in the direction of the outgoing optical wave in the beam path of the wave emitted by the oscillator (2) and reflected by the network (1) for optical homodyne or heterodyne reception.

Abstract: In order to assure in a simple manner and with the smallest axial mounting space, a low-noise bearing support having little radial unbalance, two axial ball bearings (2, 3) are provided with a firm fit relative to the rotor shaft (1) and mutually braced axially by an interposed spring washer. Advantageously, ball bearing (3) next to the open end face of the bearing hole is designed as a stationary bearing with a press lift between its inner ring (31) and the rotor shaft (1) as well as between its outer ring (32) and the bearing hole.

Abstract: A method for fashioning ink channels in a write head for a dot-matrix ink printer means, whereby respective form needles cylindrically surrounded by piezo electric drive elements are aligned in a casting mold in accord with the desired course of the ink channels to be fashioned, are cast out with a casting compound and, after the curing of the latter, are removed upon formation of the respective ink channels partially surrounded by the allocated piezo electric drive elements, and insulation of the drive elements from a writing fluid in the ink channels is acheived in a way that is simple in terms of production engineering. The ink channels are filled with a liquid or dissolved plastic and are emptied after the inside channel walls are moistened with the plastic, so that a thin protective layer remains on the inside channel walls. The new method serves for the manufacture of ink printer heads that work based on the principle of individual drop ejection (drop on demand).

Abstract: An electrically conductive network which, at one end, has a low-resistance connection with a user's hand and, at the other end, has a high-resistance connection with ground. This protects electrical equipment such as a telephone keyset from electrostatic discharge and also protects the user from unpleasantly high discharge currents.

Abstract: Disclosed is a process of producing a phosphate coating on a composite part consisting of steel and galvanized steel, which comprises alkaline cleaning, rinsing with an aqueous rinsing bath, and phosphatizing with an aqueous zinc phosphate solution. The formation of a non-uniform coating and of spots is avoided in the process of the invention by the use of a rinsing bath which contains at least 0.2 g/l alkali borate, at least 0.1 g/l alkali silicate and at least 0.05 g/l alkali nitrite, and which preferably contains said components in a total up to 5 g/l.If the composite part is to be activated with an activating bath which contains titanium phosphate before being contacted with the zinc phosphate solution, the activating bath must contain at least 1 g/l and preferably up to 4 g/l of tetraalkalipyrophosphate.The process of the invention can be used to prepare composite parts of steel and galvanized steel for subsequent painting, particularly by electrophoretic dip painting.

Abstract: An explosive powder charge operated fastening element setting device includes a housing having a firing direction with a guidance tube located within an outlet tube in the housing. The guidance tube and outlet tube are displaceable in the firing direction within the housing. A piston for driving a fastening element is displaceable in the firing direction within the guidance tube so that it can be returned to the firing position. A spring clip mounted in the outlet tube transmits a pulling motion on the outlet tube to the guidance tube while the piston is held in the housing against similar movement. During the pulling motion, a spring clip with a pair of legs extending transversely of the firing direction co-acts with shoulders projecting outwardly from the guidance tube at its forward end for placing the piston in the firing position toward the rearward end of the guidance tube.

Abstract: A circuit for deriving a temperature-independent square-wave signal from a measurement signal which consists of a DC component and an AC component and which is taken across a magneto-resistor exposed to an alternating magnetic field. The circuit has a controllable impedance, a timing section with a relatively long time constant, and operational amplifiers with FET inputs.

Abstract: In the device for evaluating test strips having individual test sections, which consist of a terminal, a work platform with holder for the test strips and a sensing head, a position mark 5 is arranged for each test section 9 on the side of the holder 13. On the work platform 15, the sensing head 14 is arranged so as to be capable of of traversing the test sections 9 and the position marks 5. The sensing head 14 is provided with light sources 6, which are directed towards the test sections 9, of different wavelength and with a light receiver and with at least one position detector 10 which is directed towards the position marks.

Abstract: Novel photopolymerizable recording materials, in particular for the production of printing plates and relief plates, can be developed with water or an aqueous alkaline solution and predominantly consist of a photoinitiator-containing mixture of (a) one or more low molecular weight compounds having one or more photopolymerizable olefinically unsaturated double bonds and (b) one or more organic polymeric binders and contain a bisacylphosphine oxide as the photoinitiator.These recording materials are useful for the production of printing plates and relief plates.

Abstract: A roll assembly for a rolling-mill stand has a pair of axis-defining, coaxial, and axially spaced journals, respective roll supports carried in the journals and rotatable therein about the axis, and a roll ring engaged between the supports. The roll supports are each formed with a pair of radially spaced and separate annular surfaces both centered on the axis and the surfaces of one support are directed at least generally axially toward the other roll support. At least one of the surfaces of each pair is substantially frustoconical and forms with the axis a different angle from the other of the surfaces of the pair. One of the supports is formed at the axis with an axially extending passage and the roll ring is formed with generally axially oppositely directed pairs of annular surfaces respectively complementary to and flatly engaging the annular surfaces of the roll supports.

Abstract: A process is described in which cast iron melt are inoculated in the mold. The cast iron melt flowing through the sprue or gate system of the mold is contacted in the mold with an inoculate body that is contained in the mold. In order to increase the rate of dissolution and to improve the results of inoculation, said body is mounted at both ends in mutually opposite recesses (core prints) in the wall of the sprue or gate system. In another embodiment, the flow area is constricted closely below the inoculating body.

Abstract: A process for the production of polyphenylene ethers with reduced inherent color by the addition of a boron compound after the termination of the oxidative coupling reaction and removal of the metallic catalyst residues.

Abstract: A safety arrangement for filling and emptying an anesthetic vaporizer via a supply vessel connected thereto includes a movable tube-shaped conducting member having first and second ends. A vessel-connecting piece is provided on its first end and an index member is provided on its second end for engaging a vaporizer. The tubular-shaped conducting member has a ventilating channel separate from the filling channel and the safety arrangement is improved with respect to its use characteristics. This improvement is obtained in that a joint piece is connected to the second end of the tubular conducting member intended for the vaporizer. An index member is rotatably journalled in the joint piece and contains respective line segments of the filling channel and the ventilating channel.

Abstract: In a method for creating a corrosion-resistant coating (27) of high reflectivity on the surface of a workpiece (22), especially a glass reflector insert, in an evacuable coating chamber with a vaporizing system disposed therein, a second coating (24) of aluminum is deposited cold from a vapor onto a first, cold-applied coating (23) forming an adhesion mediator of nickel-chromium oxide, and onto that a third coating (25) of SiO.sub.2 is applied cold, and a fourth coating (26) of TiO.sub.2 or Ta.sub.2 O.sub.5 is applied at a workpiece temperature of at least 250.degree. C., and finally, as a fifth coating (27), a nickel-chromium oxide layer is deposited reactively from a vapor at a workpiece temperature of at least 250.degree. C. The deposit of the first, third, fourth and fifth coatings (23, 25, 26, 27) from a vapor is performed by means of electron beam vaporizers and the vapor depositing of the second coating (24) is performed by means of a resistance vaporizer.

Abstract: Superheterodyne receivers for optical signals can be composed of two branches. The first branch contains a superheterodyne receiver in which the reception signal and the signal of a local oscillator are mixed in a traditional way; in the second receiver branch, the signal of the local oscillator experiences a 90.degree. phase rotation before the mixing. An optical triple coupler inventively serves for dividing the reception light and the light of the local laser onto both reception branches. This triple coupler can be manufactured as a triple fiber coupler or, on the other hand, has an integrated-optical triple coupler of lithium niobate, glass or of a III-V semiconductor.

Abstract: A method for fashioning ink channels in a write head for a dot-matrix ink printer means, whereby form needles respectively coated by parting agent and cylindrically surrounded by piezo electric drive elements are aligned in a casting mold in accord with the desired course of the ink channels to be fashioned, are cast out with a casting compound and, after the curing of the latter, are removed upon formation of the respective ink channels partially surrounded by the allocated piezo electric drive elements, and isolation of the drive elements from a writing fluid in the ink channels is achieved in a way that is simple in terms of production engineering. An envelope coat is applied to the form needles coated with parting agent, being applied thereto before they are introduced into the casting mold, this envelope layer forming the inside channel wall of the appertaining ink channel after the removal of the form needles and of the parting agent.