| 摘要 |
PURPOSE:To make a captioned duct hard to be affected by noise by forming said duct with one central conductor and a conducting case which coaxially surrounds said conductor nearly over its whole length while having nearly OMEGA-shaped section. CONSTITUTION:The captioned duct consists of one central conductor 1 and a conducting case 2 which is coaxially provided with the central conductor 1, and which surrounds the central conductor 1 over nearly its whole length. The core line 6 of a coaxial cable 5 is inserted into the conducting case 2 through an opening 3, and the end part of the core line 6 is brought in contact with the central conductor 1 while the electrode 9 of a current collector 8 which is connected to the shield line 7 of the coaxial cable 5, is brought in contact with a supporting member 4. A roller 10 rolls on the supporting member 4. As mentioned above, since the duct consists of one central conductor 1 and a conducting case 2 which is coaxially provided with the central conductor 1 and which surrounds the central conductor 1 nearly over its whole length, it is possible for the duct to carry out the transmission of an unbalanced type signal equally to a coaxial cable, while being hardly affected by noise.
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