Abstract: The present invention relates to a brush type contact material, including one or more curved metal pawls of which ends come into contact with objects to be contacted. The ends of the pawls have an arc-like cross section in a thickness direction, a curvature radius R1 on a front side from a contact point with the object to be contacted and a curvature radius R2 on a back side from the contact point are formed so as to be R1?R2, and also both ends in a width direction of the pawl are chamfered. At this time, preferably, R1 is larger than R2 (R1>R2), and R1 divided by R2 (R1/R2) is 3.0 or less. The brush type contact material according to the present invention enables a smoother sliding movement than ever before and can be relatively simply manufactured.

Abstract: The present invention relates to a brush type contact material, including one or more curved metal pawls of which ends come into contact with objects to be contacted. The ends of the pawls have an arc-like cross section in a thickness direction, a curvature radius R1 on a front side from a contact point with the object to be contacted and a curvature radius R2 on a back side from the contact point are formed so as to be R1?R2, and also both ends in a width direction of the pawl are chamfered. At this time, preferably, R1 is larger than R2 (R1>R2), and R1 divided by R2 (R1/R2) is 3.0 or less. The brush type contact material according to the present invention enables a smoother sliding movement than ever before and can be relatively simply manufactured.

Abstract: A clad electrode for a spark plug used as an center electrode and a ground electrode of a spark plug composed of a precious metal tip arranged at the leading end of a spark plug and a base material to which the precious metal tip is joined, wherein a junction interface between the precious metal tip and the base material is substantially planar, and a 5 ?m to 100 ?m-thick diffusion layer is formed in the joined part of the clad electrode. This clad electrode is manufactured with placing the joining face of a substantially columnar precious metal tip in abutting contact with a surface of the base material, preliminarily joining the precious metal tip to the surface of the base material with resistance welding, punching out a part in which the base material and the precious metal tip are integrated with each other, and diffusion-joining the base material and the precious metal tip with heat treatment.