Abstract: Apparatus for positioning a transducer head in a prescribed relationship relative to a selected track on a recording medium. The apparatus includes a lead screw that is threadedly coupled to a bracket for supporting the transducer head, whereby a controlled rotation of the lead screw functions to move the transducer head along the surface of the recording medium, to the prescribed position. Rotation of the lead screw is controlled by a geneva mechanism that includes geneva wheel coupled to the lead screw and a geneva driver driven by a reversible d-c motor. Each revolution of the geneva driver rotates the geneva wheel, and thus the lead screw, through a prescribed angle, such that the transducer head is moved along the recording medium by a prescribed amount, such as one track spacing.

Abstract: The preparation of bicyclic enol-ethers (I) ##STR1## (where n is from 3 to 12, and R.sup.1, R.sup.2 and R.sup.3 may be H or C.sub.1 --C.sub.4 -alkyl) by free radical adduct formation of CHR.sup.1 =CR.sup.2 --CHR.sup.3 --O--R.sup.4 (III)(where R.sup.4 is tert.-butyl, tetrahydrofuran-2-yl or tetrahydropyran-2-yl) with a cyclic ketone (IV) ##STR2## followed by acid-catalyzed cyclization, and novel compounds II ##STR3## The compounds (I) and (II) are intermediates for the synthesis of musk-like fragrances.

Abstract: Aqueous textile softeners containing as active ingredient a condensate of 1 mole of a bis- or tris-hydroxyalkylamine of the formula ##STR1## where R.sup.1 is H, alkyl of 1 to 4 carbon atoms, hydroxyethyl or 2-hydroxypropyl and R.sup.2 is H or CH.sub.3, with from 0.8 to 2 moles of a fatty acid of 16 to 18 carbon atoms, the said condensate being in the form of a salt with an inorganic or organic acid or being partially or completely quaternized at the amine nitrogen, cannot readily be formed into liquids containing 10% or more of active ingredient.According to the invention liquids containing from 15 to 40% by weight of such an active ingredient can be formed by adding from 3 to 15% by weight based on the active ingredient of a compound of the formula II ##STR2## where n is an integer from 1 to 4, R.sup.3 and R.sup.4 independently of one another are methyl, ethyl or propyl, R.sup.5 is hydrogen or methyl and R.sup.

Abstract: New thienylmethyl-thiophosphoric acid esters of the formula ##STR1## where R.sup.1 denotes methyl or ethyl, R.sup.2 denotes linear or branched alkyl of a maximum of 5 carbon atoms, X denotes oxygen or sulfur, Y denotes sulfur or --NH--, Z denotes halogen, and n denotes one of the integers 0, 1, 2 and 3, which are effective against pests, especially insects, Arachnida and Nemathelminthes, and pesticides containing these compounds as active ingredients.

Abstract: Chromane derivatives (I) ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are H or C.sub.1 -C.sub.8 -alkyl, R.sup.4 is H, C.sub.1 -C.sub.8 -alkyl or C.sub.1 -C.sub.8 -acyl and R.sup.5 is C.sub.1 -C.sub.8 -alkyl are prepared by reacting a hydroquinone (II) ##STR2## with a Lewis acid or a Lewis acid derivative having the same action, and with a nitrile CH.sub.2 .dbd.CH--C(R.sup.5)(OR.sup.6)CN (III), where R.sup.6 is H, C.sub.1 -C.sub.4 -acyl or C.sub.1 -C.sub.4 -alkyl, or with a compound from which III is formed in situ, in the presence of an inert solvent.

Abstract: A process for the preparation of polyene-aldehydes, derived from 2,6-dimethyl-2,4,6,8-nonatetraen-1-al by substitution in the 9-position, by means of the Wittig ylide synthesis. The process is based on the observation, contrary to all expectation, that on reacting 2,6-dimethyl-octa-2,4,6-triene-1,8-dial with an equimolar amount of an ylide, it is exclusively the 8-al group of the dialdehyde which reacts. This specificity of the reaction is of particular importance for the preparation of the food dye .beta.-apo-8'-carotinal.

Abstract: New and valuable polycyclic compounds which contain nitrogen-containing rings and have a strong action on plants, agents for influencing plant growth containing these compounds, and a method of influencing plant growth with these compounds.

Abstract: A process for the preparation of caprolactam wherein, in a first stage, cyclohexanone-oxime is vaporized, in the presence of inert gases, by bringing it into contact with a fluidized bed of inert solid particles at from 150.degree. to 250.degree. C., and the mixture of cyclohexanone-oxime vapor and inert gases is passed into a second stage, where the cyclohexanone-oxime is rearranged to caprolactam at from 230.degree. to 450.degree. C. over a supported catalyst, containing boron trioxide, in a fluidized bed.

Abstract: Novel 2-substituted 1-alkyl-nitroimidazoles and a process for their preparation by reaction of 2-methyl-nitroimidazoles with oxalic acid diesters, followed by reaction of the resulting nitroimidazol-2-yl-pyruvic acid esters with chlorine, in turn followed, if desired, by reaction of the resulting 2-dihalomethyl-nitroimidazoles with water.Both the novel and the known compounds obtainable by the process of the invention are valuable starting materials for the preparation of dyes, pesticides and drugs.

Abstract: A process for rapidly cooling gases which contain caprolactam vapor and which have been obtained by catalytic rearrangement of cyclohexanone-oxime in the gas phase in the presence of a supported catalyst containing boric acid, wherein a finely divided coolant at from 90.degree. to 200.degree. C. is fed into a cooling zone from above, gases which are at 330.degree.-400.degree. C. and contain caprolactam vapor are introduced radially at high speed through nozzle orifices over the downstream portion of the cooling zone, and are cooled to 100.degree.-200.degree. C. by thorough mixing with the finely divided coolant, and the cooled mixture is discharged.

Abstract: Binders which comprise (A) an aqueous emulsion of a copolymer A, having a glass transition temperature of 0-50.degree. C., of monoolefinically unsaturated carboxylic acid esters, with or without styrene, vinyl acetate, vinyl chloride and acrylonitrile, which copolymer contains, as copolymerized units, small amounts of monoolefinically unsaturated monocarboxylic acids and/or dicarboxylic acids and/or their amides (of which the nitrogen atoms may or may not be alkyl-substituted and/or alkylol-substituted) and small amounts of monomers containing carbonyl groups, (B) from 0.05 to 1 mole, per mole of carbonyl groups present in the copolymer A, of a water-soluble aliphatic dihydrazine compound and (C) from 0 to 0.

Abstract: Colored polymeric compounds of the general formula ##STR1## where A is the radical of a quaternized, methylene-active compound, R is unsubstituted or substituted alkyl, cycloalkyl or phenyl, R.sup.1 is hydrogen, chlorine, bromine, hydroxyl, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, T is alkylene which is unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 -alkoxy or hydroxyl, or is a radical of the formula ##STR2## M.sup..crclbar. is an anion and n is a number >1. The compounds according to the invention are particularly suitable for coloring paper stock.

Abstract: Alkylaminopropanol derivatives of 2-(o-hydroxyphenyl)-pyrrole of the formula (I) ##STR1## where R is hydrogen or is alkyl of 1 to 8 carbon atoms which is unsubstituted or substituted by hydroxyl, alkoxy of 1 to 3 carbons atoms or cycloalkyl of 3 to 8 carbon atoms in the ring, or is alkenyl or alkynyl of 2 to 8 carbon atoms or is cycloalkyl or cycloalkenyl of 3 to 8 carbon atoms in the ring, the cycloalkyl rings being unsubstituted or monosubstituted or disubstituted by alkyl or 1 to 3 carbon atoms, and their physiologically acceptable acid addition salts, processes for their preparation, and pharmaceutical formulations which contain the said compounds and may be used in the treatment of cardiac and circulatory disorders.

Abstract: A storage-stable, pourable and pumpable aqueous suspension which contains finely divided water-insoluble sodium aluminum silicate and one or more hydroxyl-free saturated or unsaturated aliphatic dicarboxylic acids of 3 to 10 carbon atoms, or their alkali metal salts, as a stabilizer and flow improver.

Abstract: A process for the preparation of 2,2-dimethyl-4-cyano-butyraldoxime N-methyl-carbamate wherein 2,2-dimethyl-4-cyano-butyraldoxime is reacted with an at least equimolar amount of methylcarbamic acid chloride in the form of a concentrated solution of at least 8 moles thereof per liter of inert organic solvent, in the presence of from 1.05 to 2 moles of a tertiary aliphatic amine per mole of 2,2-dimethyl-4-cyano-butyraldoxime, at from 0.degree. to 30.degree. C.

Abstract: Aminosulfonylcarboxylic acids and their manufacture from diamines and chlorosulfonylcarboxylic acids.

Abstract: A process for the manufacture of magnetic recording media by dispersing a mixture of particulate anisotropic magnetic material and additives in a solution of a polymeric binder in an organic solvent, compressing and then releasing the pressure on the dispersion, thereafter applying a layer of the dispersion to a non-magnetizable base, orienting the anisotropic magnetic material by means of a magnetic field, and drying the coating.

Abstract: Apparatus for determining the stress-strain characteristics of materials in the viscoelastic state, especially polymer melts, in which a bar-shaped test specimen arranged vertically in a thermostable bath is stretched by means of a tape attached to a motor-driven reel and the tensile forces are continuously measured by a load cell arranged below the specimen and within the bath.

Abstract: High molecular weight polyglycerol derivatives, useful as thickening agents for water-based lubricants, are prepared by oxyalkylating a polyglycerol with ethylene oxide or a mixture of ethylene oxide and propylene oxide. The polyglycerol derivatives are characterized as having an average of more than five glycerol units, and in having more than 95% and preferably more than 99% alkylene oxide units. These compounds exhibit excellent shear strength and provide an improved hydrolube when incorporated therein.

Abstract: Aqueous polyacrylate dispersions having improved flow characteristics are prepared by polymerizing esters of acrylic acid and/or methacrylic acid and alkanols of 1 to 10 carbon atoms, with or without admixture of styrene and/or vinyl esters and/or water-soluble monoolefinically unsaturated comonomers (the monomer feed being in the form of an emulsion), in aqueous emulsion in the presence of a free radical polymerization initiator, a protective colloid, a nonionic emulsifier and a regulator, at least a part of the protective colloid being introduced into an aqueous initial charge, and a water-soluble regulator being employed in the initial charge and in the feed.