Abstract: Improved circuits for pre-emphasis and de-emphasis of video luminance signals, the improvement comprising the utilization of field effect transistors in a non-linear frequency-discriminating network; and automatic circuitry useful in both recording and reproduction of recorded video information.

Abstract: In an electrolytic cell for the production of halogen and caustic from an aqueous alkali metal halide solution containing anode and cathode compartments separated by a diaphragm an improved diaphragm is provided. The diaphragm is a porous sheet material made of a tetrafluoroethylene polymer having a low amorphous content and a micro-structure characterized by nodes interconnected by fibrils having a porosity of about 50 to 90 percent and a very tortuous path of interconnection. The improved diaphragm has an extremely long service life.

Abstract: A track or switch tamping machine wherein the machine includes tamping and ramming units having longitudinal ducts for injecting liquid binder into the ballast. The longitudinal ducts terminate in a plate or cavity within the lower portion of the tamping and ramming units. A nozzle is also included in the unit as is means for conveying liquid binder from a storage tank carried on the machine.

Abstract: The invention relates to an apparatus for drying photosensitive sheets, which have already been exposed to light and washed out, for the production of printing plates. According to the invention, a drying chamber is combined with a post-exposure device, the drying chamber and post-exposure device preferably being separated by a partition which transmits actinic light rays. The apparatus according to the invention can be used with advantage in the production of printing plates with photosensitive layers, particularly because it can considerably shorten the times hitherto required for the production of the plates.

Abstract: Thermoplastic molding material based on styrene polymers and olefin polymers which have been flameproofed with an organic bromine compound. Brominated oligomers or polymers of dialkylbenzenes, trialkylbenzenes or tetraalkylbenzenes serve as flameproofing agents. The molding material may be processed into self-extinguishing moldings.

Abstract: The invention relates to magnetic tape cartridges in general in which between the tape packs and the upper and lower cartridge walls liners are provided which have regions that resiliently guide the tape packs and/or the magnetic tape. By means of specifically shaped regions of the liners, guide channels for the outer turns of the tape pack and/or for the winding or unwinding magnetic tape are formed according to the invention. By virtue of particular spatial arrangements of these guide channels, slipping and folding of the turns of tape already wound is avoided and the magnetic tape is maintained in the correct position as it leaves and joins the packs, irrespective of the type of bearing means used for the tape winding reels and irrespective of the shape of the tape packs, so that disturbances in operation are avoided and the tape is correctly positioned relative to the scanning means.

Abstract: Particulate polymers of ethylene are prepared by polymerization of ethylene or ethylene/.alpha. -monoalkene mixtures in a dry agitated bed (B) of the particulate polymer by means of a Ziegler/Natta catalyst system consisting of (1) a titanium-containing component and (2) an aluminum-containing component, the said components (1) and (2) being separately fed to the bed (B). Component (1) is a particulate reaction product (U) (of) (1.1) a substance of the formula TiCl.sub.3 . (AlCl.sub.3).sub.n where n is a number equal to from 0 to 0.34, and (1.2) a reaction product (R) of phosgene and a substnace (S) obtained from a substance of the formula Mg.sub.6 . Al.sub.2 . (OH).sub.16 . CO.sub.3 . (H.sub.2 O).sub.4 by calcination (heating), provided that (R) has a chlorine content of from 10 to 76% by weight and (U) has been obtained by milling (1.1) and (1.2) together.

Abstract: The compound Ni.sub.6 Al.sub.2 (OH).sub.16. CO.sub.3. 4H.sub.2 O is isolated from aqueous solution. The catalyst is obtained from this compound by drying, calcination and subsequent reduction in a stream of hydrogen, whilst maintaining very specific temperature gradients between the drying stage and the calcination stage. A process for the manufacture of gases containing methane from hydrocarbons by steam cracking, in which the abovementioned catalyst is employed, is also described.

Abstract: N-alkylated arylamines are prepared by reaction of arylamines which have at least one hydrogen atom on the nitrogen, with olefins or cycloolefins which can have substituents which are inert under the reaction conditions, at temperatures from 180.degree. to 450.degree.C, in the presence of catalysts. The improvement is that silicic acid which contains from 0.1 to 30 percent by weight of phosphoric acids, based on silicic acid, is used as the catalysts and that catalytic amounts of water are employed. N-alkylated arylamines are starting materials for the manufacture of dyes, pesticides, plant protection agents and growth regulators, and can also be used as mineral oil additives.

Abstract: Naphthalimides of the formula ##SPC1##In which R and R.sup.1 are hydrocarbon radicals. The compounds are eminently suitable for the optical brightening of synthetic fibers, particularly polyesters, on which outstanding brightening effects are obtained.

Abstract: A process for the partial dehydration of cyclohexanone oxime by treatment with aqueous solutions of inorganic salts, wherein the crude cyclohexanone oxime is extracted, above its melting point, with a concentrated ammonium salt solution and/or hydroxylammonium salt solution in countercurrent in an extraction column and the salt solution is then separated from the partly dehydrated cyclohexanone oxime, reconcentrated by evaporation and recycled to the oxime dehydration process. The cyclohexanone oxime melt which has been dehydrated to water contents of about 4 to 6% by weight is treated with a heated inert gas above its melting point and the off-gas is washed to remove entrained cyclohexanone oxime.

Abstract: A device for cleaning the surfaces of a moving flanged reel consists essentially of an assembly of nozzles which are provided with electrical discharge means and direct charged gas onto the reel and are arranged adjacent to the path along which the reel is transported, and a suction device for withdrawing the particles, etc. removed from the reel. Other embodiments of the invention concern the positioning of the nozzles, the arrangement of the suction device, the positioning of the reel during the cleaning process and an advantageous device for conveying a plurality of reels to be cleaned one after the other.The cleaning device of the invention can be used to clean flanged reels of all types on which strip materials susceptible to dust such as photographic film and magnetic tape, especially magnetic tape for date and video recording, are to be wound.

Abstract: Reversibly moisture-vapor-absorptive sheet materials and a process for their manufacture in which water-soluble polymers of vinyl ethers are combined with base materials and crosslinked thereon.

Abstract: Anthrapyrimidine dyes of the formula: ##SPC1##In whichA is saturated alkylene of two to eight carbon atoms or cycloalkylene of six to eight carbon atoms; and ##EQU1## B is hydrogen, or IN WHICH X is saturated alkyl of one to nine carbon atoms which may bear other substituents, phenalkyl, a five-membered or six-membered heterocyclic ring, --NHR or --OR in which R is alkyl of one to six carbon atoms, cycloalkyl of six to eight carbon atoms or unsubstituted or substituted phenyl. On synthetic fibers or in thermoplastics the dyes give yellow to orange colorations which have very good fastness properties.

Abstract: A process for drawing in and compressing gases and mixing the same with liquid material, wherein the gases are first premixed with one or more liquid jets at a velocity of from 10 to 70 m/sec, the smallest cross-sectional area of the mixing nozzle being at a distance from the propulsive jet which is equal to from 1 to 10 times the smallest hydraulic diameter of the mixing nozzle, which smallest cross-sectional area of the mixing nozzle is equal to from 1.5 to 15 times the smallest cross-sectional area of the propulsive jet. The two-phase liquid mixture is passed through the mixing nozzle to the narrowest point of an impulse exchange tube disposed in the liquid medium, which impulse exchange tube is open at its inlet and outlet and is preferably provided with a diffuser. The smallest cross-sectional area of the impulse exchange tube is equal to from 1.

Abstract: New and valuable herbicide mixtures of 2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranylmethane sulfonate and carbamates of the formula ##SPC1##Where X denotes hydrogen or lower alkyl.

Abstract: Molding compositions based on polybutylene terephthalate distinguished by improved tracking resistance and containing, based on the total weight of the molding composition, from 5 to 50% by weight of a polyolefin.

Abstract: Anthraquinoid disperse dyes of formula: ##SPC1##In whichX is hydrogen, chloro, methyl, methoxy or ethoxy;Y is alkylene of two to eight carbon atoms or --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --; and-Z is CN or COOH.The dyes give deep blue colorations of high fastness to light and heat setting on synthetic materials and particularly those of linear polyesters. The dyeings have a neutral evening shade which is not displaced toward red.

Abstract: Suitable compounds for stabilizing polyamides against oxidation and thermal degradation are bis-ureas and bis(acid amides) based on 2,6-di-t-butylphenol-butylamine said compounds having the general formula: ##SPC1##Wherein Y represents the urea or amide radical.

Abstract: New and Valuable substituted 2,1,3-benzothiadiazin-(4)-one-2,2-dioxides having a good herbicidal action and a process for controlling the growth of unwanted plants with these compounds.