Abstract: This invention relates to high-carbon steel wire rod and wire excellent in drawability and methods of producing the same.The high carbon steel wire rod or wire excellent in is characterized in that it contains, in weight percent, C: 0.70-1.20%, Si: 0.15-1.00% and Mn: 0.30-0.90%, further contains as alloying components one or both of Al: 0.006-0.100 and Ti: 0.01-0.35%, is limited to P: not more than 0.02% and S: not more than 0.01%, the remainder being Fe and unavoidable impurities, and has a microstructure of, in terms of area ratio, not less than 80% upper bainite texture obtained by two-stepped transformation and an Hv of not more than 450. The high-carbon steel wire rod or wire may additionally contain Cr: 0.10-0.50% as an alloying component.

Abstract: This invention relates to high-carbon steel wire rod and wire excellent in drawability and methods of producing the same.The high carbon steel wire rod or wire excellent in is characterized in that it contains, in weight percent, C: 0.80-0.90%, Si: 0.10-1.50% and Mn: 0.10-1.00, is limited to P: not more than 0.02%, S: not more than 0.01% and Al: not more than 0.003%, the remainder being Fe and unavoidable impurities, and has a microstructure of, in terms of area ratio, not less than 80% upper bainite texture obtained by two-stepped transformation and an Hv of not more than 450. The high-carbon steel wire rod or wire may additionally contain Cr: 0.10-1.00% as an alloying component.The high-carbon steel wire rod or wire according to this invention can be drawn to an appreciably higher reduction of area than prior art products and also has improved delamination resistance property.

Abstract: This invention provides bainite wire rod and wire excellent in drawability and methods of producing the same.The bainite wire rod or wire is characterized in that it contains, in weight percent, C: 0.70-1.20%, Mn: 0.30-0.90% and Si: 0.15-1.00%, further contains as alloying components one or both of Al: 0.006-0.100% and Ti: 0.01-0.35%, if required contains Cr: 0.10-0.50%, and is limited to P: not more than 0.02% and S: not more than 0.01%, the remainder being Fe and unavoidable impurities, and has tensile strength and reduction of area determined by the following equations (1) and (2),TS.ltoreq.85.times.(C)+60 (1)RA.gtoreq.-0.875.times.(TS)+158 (2)whereC: carbon content (wt %),TS: tensile strength (kgf/mm.sup.2), andRA: reduction of area (%).

Abstract: A direct current machine, such as a motor or a dynamo, has a commutator. The commutator has a contact surface which includes a generally cylindrical contact surface. The commutator is rotatable around an axis. A brush assembly of the direct current machine includes at least two brushes. Each brush has a distal surfaces which is engagable to a contact surface of the commutator. A brush holder movably holds the brushes toward the commutator. A clearance is defined between the brush and the brush holder. Each spring urges the corresponding brush against the contact surface of the commutator. Further, the spring urges the brush to be off-set toward the front side of a rotational direction of the commutator, within the brush holder.

Abstract: The present invention is concerned with a method of producing steel wires each having a very small diameter of 0.4 mm or less and a tensile strength of 360 kgf/mm.sup.2 or more wherein a steel material having a composition comprisingC: 0.90 to 1.10% by weight, Si: 0.4% or less by weight, Mn: 0.5% or less by weight, Cr: 0:10 to 0.30% by weight and a balance of iron an unavoidable impurities is subjected to diffusion treatment as desired, thereafter, the steel material is subjected to hot rolling, the hot-rolled steel wire is subjected to drawing, subsequently, the resultant steel rod having a smaller diameter is subjected to a final patenting treatment to give said rod a strength of 140 to 160 kgf/mm.sup.2, and thereafter, it is subjected to drawing with a true strain of 3.50 or more using a die having a die approach angle of 8 to 12 degrees.

Abstract: A structure and method of fixing a housing in which four mounting grooves are formed at regular intervals along a peripheral direction at an opening end of a cylindrical yoke housing. An end housing is provided with a peripheral portion whose outer diameter is formed smaller than an inner diameter of the yoke housing, and a plurality of protrusions which protrude from the peripheral portion and correspond to the mounting grooves. In a state in which the protrusions are each mounted to the corresponding mounting grooves, four pairs of caulking claws, each pair of which is disposed at both ends in a widthwise direction of a respective mounting groove, are all fixed by being caulked simultaneously. The end housing is thereby coaxially fixed to the yoke housing.

Abstract: A photosensitive composition which comprises an electron donative organic photoconductive compound and a sensitizer having the formula ##STR1## wherein A represents an aromatic group or heterocyclic group which can be substituted by an inert group; R represents cyano, nitro, akoxycarbonyl, aryl or carbamoyl group; and n is 0 or 1.

Abstract: A vesicular image is prepared by contacting an original with a vesicular photograhic element, wherein the element contains a decomposing photosensitive material; and irradiating said element with light containing infrared light from the element side of said contacted image and element.