Abstract: A method of communicating through the earth which includes the steps of using a digital pulse train to generate a sweep pulse train which controls the frequency of a magnetic field at a first location, and at a second location, detecting the magnetic field and producing a signal at a frequency dependent on the frequency of the sweep pulse train, and extracting a replica of the digital pulse train from the signal.

Abstract: A method of communicating through the earth which includes the steps of using a digital pulse train to generate a sweep pulse train which controls the frequency of a magnetic field at a first location, and at a second location, detecting the magnetic field and producing a signal at a frequency dependent on the frequency of the sweep pulse train, and extracting a replica of the digital pulse train from the signal.

Abstract: This invention covers the use of cross-linkable redispersible dispersion powders based on vinyl ester copolymers or (meth)acrylic acid ester copolymers as binders for the dry binding of fiber materials.

Abstract: This invention covers the use of cross-linkable redispersible dispersion powders based on vinyl ester copolymers or (meth)acrylic acid ester copolymers as binders for the dry binding of fibre materials.

Abstract: A product is obtained by a process involving binding two or more layers of tissue fabrics derived from cellular pulp or cellulose fiber. In this process, a binder composition comprised of: (a) 10 to 80 parts by weight of an aqueous plastics dispersion of a solids content of 30 to 70% by weight and based on one or more copolymers comprising vinyl acetate/ethylene copolymers, vinyl acetate/ethylene/N-methylol(meth)acrylamide terpolymers, alkyl acrylate/N-methylol(meth)acrylamide copolymers and vinyl acetate/ethylene/alkyl acrylate copolymers, or vinyl acetate/alkyl acrylate copolymers, which optionally have a N-methylol (meth)acrylamide content, (b) 50 to 300 parts by weight of a filler which has an average particle size of 0.5 to 100 .mu.m, and (c) 0 to 4 parts by weight of a thickener and/or at least 0.1 parts by weight of a dispersing agent to a portion of a single layer of tissue, affixing a further single layer of tissue and drying to obtain a prelaminate.

Abstract: The invention relates to aqueous dispersions of plastics having a solids content of 30 to 70% by weight and a reduced formaldehyde content, based on polymers of one or more monomers from the group comprising acrylic acid esters, methacrylic acid esters, vinyl esters, olefins, vinyl halides, vinylaromatics and ethylenically unsaturated carboxylic acids and amides thereof, and a content of 0 to 10% by weight, based on the total weight of the polymer, of N-alkylamides and/or N-alkoxyalkylamides of ethylenically unsaturated carboxylic acids, wherein the dispersion contains 0.05 to 10% by weight, based on the polymer, of one or more peroxy compounds from the group comprising hydrogen peroxide, organic peroxides, perborates, percarbonates, persulfates and perphosphates.

Abstract: Binders for strengthening textile fiber structures and based on aqueous, self-crosslinking vinyl ester dispersions having a reduced formaldehyde content or containing no formaldehyde. The low content of free formaldehyde in the dispersion is achieved by partial or complete substitution of the crosslinking comonomers containing N-methylol groups by vinylalkoxysilanes as crosslinking agents. Non-woven treated with these formaldehyde-free or low formaldehyde binder systems are distinguished by high strength values and excellent solvent resistance.

Abstract: A fuel injection pump is disclosed in which the minimum injection quantity or idling rpm is determined by an arbitrarily adjustable stop. This stop is adjusted via a heatable bimetallic spiral, which acts counter to a spiral spring for the purpose of force compensation.

Abstract: A process of applying dyestuffs and/or chemicals or finishing materials to textiles, fibrous products, sheet materials, papers or fleeces characterized in that said dyestuffs and/or chemicals are applied in the electrostatic field.

Abstract: A fuel injection pump having a hydraulic adjuster for the instant of injection is proposed, in which in addition to the rpm-proportional adjustment of the onset of injection, a supplementary variation of the onset of injection occurs in accordance with pressure related to altitude.