| 摘要 |
1,032,722. Electromagnetic relays. HITACHI SEISAKUSHO KABUSHIKI KAISHA, and HEIKIN HITACHI ENGINEERING KABUSHIKI KAISHA. May 29, 1963 [June 4, 1962; June 5, 1962 (2)], No. 21549/63. Heading H2B. A sealed magnetic contact unit is filled with a mixture of hydrogen and nitrogen. The overlapping ends of the nickel-iron reeds may be plated with a layer of copper between 1 and 8 microns thick and then subjected to a diffusion treatment for fifty minutes in a stream of hydrogen gas at 900‹ C. In an alternative gold and copper were plated on the ends of the reeds and caused to diffuse by heating them in a stream of hydrogen at 900‹ C. |
