Abstract: A self-triggering, bidirectional control electronics component for an electronic switch (50), for the detection and rapid shutdown of currents at a selected threshold value for both current flow directions, includes a threshold switch having a plurality of selectable shutdown threshold values for both current flow directions, the threshold switch coupled to a bidirectional current sensor system (65), arranged in the electronic switch, based on sensing of sensors on an input side of the threshold switch; and a high-speed de-energizing circuit (53) on an output side of the threshold switch including a high non-load circuit voltage for rapid removal of current from a magnetic drive coil (45), the high-speed de-energizing circuit being configured to rapidly remove the current from the magnetic drive coil when the bidirectional current sensor system senses a current greater than or equal to the selected threshold value among the plurality of selectable shutdown threshold values.

Abstract: A fiber-based carrier structure is made of fractions of industrially produced reinforcing fibrous materials, which contains endless fibers in a tangled arrangement as a first reinforcing fiber component and which contains endless fiber bundles as a second reinforcing fiber component. The fiber-based carrier structure further has a pore system. Accordingly, the endless individual fibers and the endless fiber bundles are used as a mixture preferably in an isotropic tangled arrangement to produce a fiber-based carrier structure, the pore system of which is an open-cell pore system and is openly accessible from outside. The fiber-based carrier structure enables the absorption of liquids and/or solid particles by the selection of a defined mixture ratio of endless fiber bundles and endless individual fibers. A capacity to be impregnated with and the capacity to absorb liquid and/or solid powdery materials can be set by the mixture ratio.

Abstract: The invention relates to an apparatus (100) for carrying cooling water away from the narrow sides (210) of a slab (200) passed essentially vertically through a secondary cooling device after casting in a continuous casting installation. In order to prevent partial overcooling of the slab at its edges, the apparatus (100) according to the invention comprises a plurality of water drainage devices (110-n), which are arranged such that they are distributed in a vertical direction over the length of the narrow side of the slab. This plurality of water drainage devices (110-n) is carried by a vertically arranged collecting downpipe (120). The collecting downpipe additionally serves for collecting the cooling water that is drained by the plurality of water drainage devices (110-n) and carrying it away in a decentralized manner.

Abstract: The invention relates to an apparatus (100) for carrying cooling water away from the narrow sides (210) of a slab (200) passed essentially vertically through a secondary cooling device after casting in a continuous casting installation. In order to prevent partial overcooling of the slab at its edges, the apparatus (100) according to the invention comprises a plurality of water drainage devices (110-n), which are arranged such that they are distributed in a vertical direction over the length of the narrow side of the slab. This plurality of water drainage devices (110-n) is carried by a vertically arranged collecting downpipe (120). The collecting downpipe additionally serves for collecting the cooling water that is drained by the plurality of water drainage devices (110-n) and carrying it away in a decentralized manner.

Abstract: A method and a device for adjusting one or more roll segments (1) in a continuous casting installation for metals, especially for steel materials, the rolls (1a) of which adjusted in the segment upper frame (2) and the segment lower frame (3) on frame cross members (5) by pairs (4) of hydraulic piston-cylinder units in a position-and/or pressure-controlled manner, wherein an operation for guiding and/or pressing the casting strands (6) is switched from a position-controlled to a pressure-controlled operation when pressure within the respective pair (4) of piston-cylinder units reaches a predetermined maximum value, whereby an improved reaction is effected by operating the piston-cylinder unit of every roll segment (1) in the case of overload, in subsequent steps at a reduced pressure or in a pressureless switching mode until the switching mode is reached in which the segment upper frame (2) can be opened to some extent.

Abstract: A method and a device for adjusting one or more roll segments (1) in a continuous casting installation for metals, especially for steel materials, the rolls (1a) of which adjusted in the segment upper frame (2) and the segment lower frame (3) on frame cross members (5) by pairs (4) of hydraulic piston-cylinder units in a position-and/or pressure-controlled manner, wherein an operation for guiding and/or pressing the casting strands (6) is switched from a position-controlled to a pressure-controlled operation when pressure within the respective pair (4) of piston-cylinder units reaches a predetermined maximum value, whereby an improved reaction is effected by operating the piston-cylinder unit of every roll segment (1) in the case of overload, in subsequent steps at a reduced pressure or in a pressureless switching mode until the switching mode is reached in which the segment upper frame (2) can be opened to some extent.

Abstract: Rigid foams containing urethane groups and predominantly isocyanurate groups are obtained by reaction of

Abstract: The invention relates to a process for reprocessing plastic wastes, in which the plastic wastes filled into vessels are autoclaved as coherent, porous bundles with high water absorption capacity in a steam atmosphere at approximately 150.degree. to 220.degree. C., preferably 165.degree. to 190.degree. C., and melted by this means, at the end of the autoclaving process, the resulting bodies of molten plastic are at least partly dried by re-evaporating the water contained therein and are cooled.

Abstract: Rigid polyurethane foams are produced by reacting a polyisocyanate with a polyester containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of 400 to 10,000 in the presence of water, an organic blowing agent, a flameproofing agent and a compound containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range from 32 to 399 as crosslinking agent, optionally in the presence of known auxiliaries and additives. The polyester, the flameproofing agent and the crosslinking agent are used in quantities such that from about 15 to about 35 parts by weight of polyester, from about 50 to about 80 parts by weight flameproofing agent and from about 5 to about 15 parts by weight of crosslinking agent (with the sum of the parts by weight of these components adding up to 100) are present. These foams are useful as insulating materials in applications where flame resistance is important.

Abstract: Rigid foams containing urethane and isocyanurate groups are made by reacting a polyisocyanate with a compound containing at least two isocyanate reactive hydrogen atoms in the presence of an aqueous solution of alkali metal carboxylate in accordance with known techniques. The aqueous alkali metal carboxylate solution has an alkali metal carboxylate content of from about 10 to about 50% by weight. The alkali metal carboxylates are preferably alkali metal acetates such as potassium acetate. This process is carried out at an index above 150. The product foams are particularly useful as insulating materials.

Abstract: An appliance for partially dyeing the hair consists of a comb-like part (1), a handle part (2) connected thereto and a dye applicator device (3). In order to give the appliance a simple construction and to conform it so that it operates without faults and is particularly easy to use, the dye applicator device is constructed as a brush device (4) which is movable relative to the comb part (1) between a dye collecting position, in which the bristles (6) point away from the comb part (1), and a dye dispensing position, in which the bristles (6) are in contact with the comb teeth (15). The brush device (4) is pivotable about an axis oriented approximately parallel to the comb part (1), and can be actuated by use of a pivot lever (13).

Abstract: A permanent wave curler (41) has a roller sleeve (42) onto which a lock of hair can be rolled up and which, after the lock of hair has been rolled up, must be fixed with respect to the latter. In order to prevent kinks from forming on the rolled-up lock of hair, stopping levers (43) are arranged at both ends of the roller sleeve, which levers lie approximately radially with respect to the sleeve axis and are rotatably mounted on the latter, it being possible to couple the stopping levers with the roller sleeve (42) at least in the direction in which the lock of hair is unwound. The spindles (44, 45) of the stopping levers (43) are rotatable separately from each other and can be coupled with the roller sleeve (46) separately from each other (FIG. 6).

Abstract: Appliances for the partial dyeing of hair are intended, for example, to serve for dyeing individual strands of hair, in order to achieve stylish effects as a result of the color contrast.To ensure that the appliance is mastered even by less experienced staff and that dyeing is simplified and speeded up, the appliance has at least one guide prong (14), which is provided in its interior with a dye-feed bore (16) and on at least one side, spaced at a distance from the prong end (19), with at least one peripheral dye-outlet orifice (21). The appliance also includes a dye container (3), which is connected to the dye-feed bore (16) of the guide prong (14) and out of which the dye can be expressed by means of pressure, and at least one masking prong (22) which is located spaced at a distance from the guide prong and covers hair not to be dyed and which is located, approximately transversely to the working direction of the guide prong (14), next to the latter.

Abstract: The present invention is directed to a method for the production of plastics, including foams, containing urethane groups and predominantly isocyanurate groups by reacting polyesters having a molecular weight of from 350 to 10,000, and containing at least two hydroxyl groups and containing phthalic acid residues and, optionally, other polyhydroxyl compounds having a molecular weight of from 400 to 10,000 and/or chain extenders having a molecular weight of from 32 to 400 with an excess of polyisocyanates in the presence of isocyanate-trimerization catalysts and optionally blowing agents, foam stabilizers and other additives, the improvement characterized in that polyesters are used whose acid components comprise at least 50%, by weight, phthalic acid residues and wherein 10 to 49%, preferably 20 to 40%, by weight, of the isocyanate groups react to form urethane groups and 51 to 90%, preferably 60 to 80%, by weight, of the isocyanate groups react to form isocyanurate groups.

Abstract: A circuit breaker assembly is provided with a pair of contact elements defining therebetween an arc site across which an arc is struck upon separation of the contacts to break the circuit within which the breaker is connected. A compressed gas contained within a quenching chamber is caused to flow across the quenching site to quench the arc upon breaking of the contact. A pair of electrodes located within an auxilliary gas chamber operate to strike a second arc simultaneously with the circuit breaking operation in order to increase pressure in the auxiliary chamber thereby providing auxiliary power to enhance the circuit breaking operation and quenching of the main arc.