| 摘要 |
PURPOSE:To prolong a service duration by composing a curvedly formed part conductor and connecting part conductors with an angular pipe in which a plate is brazed in an opening part of a gutterlike conductor, and by brazing an abutting part from outer and inner sides in the connected part of these conductors. CONSTITUTION:A gutterlike body 21A having an approximately U-shaped cross section is made, an angular pipe is made with a metal-made plate 27A brazed to the opening part of the body 21A, and thereby a curvedly formed part conductor 3 and connecting part conductors 2A and 2B are composed of the angular pipe. In the connected part between the conductor 3 and conductors 2A and 2B, a stepped shape 21 is formed at the outside of the end part of a connected part conductor 2, also the end part is approximately rectangularly engaged with an angular hole 31 provided in a given place of the conductor 3 and is brazed from the inside via a window part 32 provided in a required position of the conductor 3, the part 32 is closed with a cover plate 33 and the plate 33 also is brazed to the angular pipe of the conductor 3. This prevents heating of the brazed part having a high electric resistance, deterioration by oxidation, and occurrence of a crack.
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