Abstract: A permanent magnet includes a magnetic base body that has a direction of magnetization and at least two recesses formed orthogonally to the direction of magnetization. The at least two recesses are formed as cut-outs and run substantially parallel to each another. A first cut-out is formed out of a first side of the base body such that no material bridge remains between the first cut-out and the first side and a second cut-out is formed out of a second side of the base body such that no material bridge remains between the second cut-out and the second side. The first and second cut-outs extend only partially along a width of the base body resulting in a first material bridge from the first cut-out to the second side and a second material bridge from the second cut-out to the first side. The first cut-out is spaced from the second cut-out.

Abstract: A permanent magnet includes a magnetic base body that has a direction of magnetization and at least two recesses formed orthogonally to the direction of magnetization. The at least two recesses are formed as cut-outs and run substantially parallel to each another. A first cut-out is formed out of a first side of the base body such that no material bridge remains between the first cut-out and the first side and a second cut-out is formed out of a second side of the base body such that no material bridge remains between the second cut-out and the second side. The first and second cut-outs extend only partially along a width of the base body resulting in a first material bridge from the first cut-out to the second side and a second material bridge from the second cut-out to the first side. The first cut-out is spaced from the second cut-out.

Abstract: At least one permanent magnet for an electrical machine is produced by first producing a permanently magnetic base body by compression molding or extrusion. A first partial region of the base body is separated from at least one second partial region of the base body by a cutting process. At least one permanent magnet is provided by the first partial region. The at least one permanent magnet is provided with a cavity by the cutting process.

Abstract: A method for the production of a casting core is provided. The method includes preparing a mold which has at least one cavity and at least one filling opening which is fluidically connected to the cavity, introducing a liquid, hardenable salt molding material into the cavity via the filling opening, and at least partial hardening of the salt molding material introduced into the cavity to form a hollow body produced from hardened salt molding material, the hollow body having at least one hollow space of the casting core which is delimited by the hardened salt molding material. The hollow space of the casting core is closed on all sides by means of the salt molding material introduced into the cavity. A casting core is also provided.

Abstract: A cooling duct piston (1) for combustion engines. The cooling duct piston has a piston basic body (2) that is connected to a lining part (3), which is facing an assigned combustion chamber. Here, the lining part (3) completely forms the piston surface (4) of the cooling duct piston (1) that faces the combustion chamber. An encircling depression (5) is provided in the surface of the piston basic body (2) facing the combustion chamber. The lining part (3) provides a permanent connection at least with the surface of the piston basic body (2) facing the combustion chamber, and thus bridges the encircling depression (5), such that the encircling depression (5), with the lining part (3) that bridges it, forms a cooling duct (6).

Abstract: A semifinished product blank, suitable for the production of a steel piston (1) for internal combustion engines having cylinder crankcases made of light metal alloys. Such a steel piston (1) has at least one upper piston part (4) which has a combustion recess (2) and an annular wall (3), and a lower piston part (4?) which has a piston skirt (5) and a connecting rod bearing (6). The semifinished product blank is made of an austenitic steel, that is stabilized with Ni, Mn and N and that has a thermal expansion coefficient in a range of 16 to 21×10?6 K?1. Also disclosed is a steel piston, which at least has a piston skirt (5) made of an austenitic steel that is stabilzed with Ni, Mn, N. The piston skirt (5) has a thermal expansion coefficient in a range of 16 to 21×10?6 K?1.

Abstract: A cooling duct piston (1) for combustion engines. The cooling duct piston has a piston basic body (2) that is connected to a lining part (3), which is facing an assigned combustion chamber. Here, the lining part (3) completely forms the piston surface (4) of the cooling duct piston (1) that faces the combustion chamber. An encircling depression (5) is provided in the surface of the piston basic body (2) facing the combustion chamber. The lining part (3) provides a permanent connection at least with the surface of the piston basic body (2) facing the combustion chamber, and thus bridges the encircling depression (5), such that the encircling depression (5), with the lining part (3) that bridges it, forms a cooling duct (6).

Abstract: A semifinished product blank, suitable for the production of a steel piston (1) for internal combustion engines having cylinder crankcases made of light metal alloys. Such a steel piston (1) has at least one upper piston part (4) which has a combustion recess (2) and an annular wall (3), and a lower piston part (4?) which has a piston skirt (5) and a connecting rod bearing (6). The semifinished product blank is made of an austenitic steel, that is stabilized with Ni, Mn and N and that has a thermal expansion coefficient in a range of 16 to 21×10?6 K?1. Also disclosed is a steel piston, which at least has a piston skirt (5) made of an austenitic steel that is stabilzed with Ni, Mn, N. The piston skirt (5) has a thermal expansion coefficient in a range of 16 to 21×10?6 K?1.

Abstract: An apparatus for the production of calcium silicate based stone blanks including at least one mold into which a crude mixture is poured, the mixture comprising granulated silicate-containing material, lime, water, a cement and foam. The mold has a cover, a bottom and side plate, with one of the plates being movable to open and close the mold. The crude mixture is heated in the mold essentially uniformly to a temperature between 45.degree. C. and 90.degree. C. until achieving the desired blank-strength by strength-forming reactions of the cement in the crude mixture. The heater used for this purpose is a high frequency voltage heater using two parts of the mold as condensor plates connectable with a high frequency voltage source. The formed stone blanks are thereafter removed from the mold and transferred to a transport station.

Abstract: A process and apparatus is provided for the production of calcium silicate-containing stone blanks which are useful in constructing building walls. A crude mixture, of a granulated silicate-containing material, lime, water, a cement and a foaming agent, is subjected to no more than a minimum application of external pressure and is subsequently hardened in an autoclave. The cement produces the necessary strength for the blank, so that the latter becomes transportable while the final strength is achieved by reaction of the silicate-containing material during the autoclave treatment. In order to arrive at acceptable molding times and in order to achieve a simplified process with slight fragment bulk density and optimal head damping characteristics, the crude mixture is rendered pourable, is filled into molds in a quantity corresponding to the fragment volume of the stone blank, and the crude mixture in the mold is heated essentially uniformly to a temperature between 45.degree. C. and 90.degree. C.

Abstract: The manufacturing of at least one photothermal converter element according to the invention consists essentially of implanting a multiplicity of substantially uniformly distributed parallely projecting transparent fibers onto a baseplate element provided with an absorbing coating of a normally solid material capable of being temporarily converted to a plastic state, thanks to the use of an array of guiding means arranged above the baseplate element. The implantation proper of the desired fiber structure is then performed by advancing a series of bundles of fibers through the array of guiding means, to the desired level above the baseplate element, and by clipping the advanced bundles to the desired length above the guiding means, so as to cause the falling with limited transverse spreading of the clipped fibers onto the coating of the baseplate element.

Abstract: Device for cleaning an open-ended spinning turbine comprises a bell which can be fitted to a container holding the spinning rotor and which is mounted on an arm operated by a jack.The bell bears a piston of which the front tapered end probes the bottom of the throat for uniting the fibers in the rotor when the bell is joined to the container.The procedure consists in letting a certain quantity of fibers enter after breakage of the yarn so as to form a ring of fibers in the rotor and then to press this ring by means of the piston until the rotor stops, while the scraping or rubbing of the ring of fibers enables the impurities stuck in the area of the throat for uniting the fibers to be detached.

Abstract: A cleaning procedure consisting in imparting some ultrasonic vibrations of which the frequency is a harmonic of the natural frequency to at least one mode of vibration of a groove (1b) for union of fibres in a rotor (1) of a spinning unit, and in applying to the rotor a transducer (3) fed with current of an ultrasonic frequency by a generator (4) in such a way as to impart to the wall of the groove an energy capable of detaching the impurities lodged there so that the latter can be discharged with the help of a suction head (5) connected to a fan (6).This procedure can be employed especially at the time when the yarn is pieced-up on a spinning machine of the open-end type.

Abstract: A device comprising a casing which bears two distinct hinged (articulated) systems, of which one is activated by jacks and includes four arms of which two are hinged together at one of their ends while another is hinged on the casing and on the free end of the arm, and the arm is hinged on the casing and at the middle of the arm that bears a roller to disengage the cop from the drive shaft.The other system comprises two parallel arms hinged on an intermediate plate, two parallel arms hinged on the plate and on a support of the re-attachment head connected to a system of suction by means of a conduit and including two motors to drive in rotation a roller controlling the cop and to make its front part rotate by 180.degree. in respect of its rear part.In the re-attachment position the roller is employed to rotate a roller by friction located at the outlet of the turbine.

Abstract: A process and apparatus is provided for the production of calcium silicate-containing stone blanks which are useful in constructing building walls. A crude mixture, of a granulated silicate-containing material, lime, water, a cement and a foaming agent, is subjected to no more than a minimum application of external pressure and is subsequently hardened in an autoclave. The cement produces the necessary strength for the blank, so that the latter becomes transportable while the final strength is achieved by reaction of the silicate-containing material during the autoclave treatment. In order to arrive at acceptable molding times and in order to achieve a simplified process with slight fragment bulk density and optimal head damping characteristics, the crude mixture is rendered pourable, is filled into molds in a quantity corresponding to the fragment volume of the stone blank, and the crude mixture in the mold is heated essentially uniformly to a temperature between 45.degree. C. and 90.degree. C.