| 摘要 |
712,561. Batteries. ELECTRIC STORAGE BATTERY CO. June 20, 1952, [Aug. 28, 1951.] No. 15557/52. Class 53. [Also in Group XXII] An electrode consisting of a porous silver salt or oxide has parts of non-porous silver, the whole having been made from porous silver. The electrode is made by impregnating a sheet of paper, cloth or other porous combustible material with silver nitrate and igniting the sheet, the temperature being kept below the melting point of silver. The sheet of porous silver so formed is subjected to pressure in a press so that certain areas such as the lug 11 and bar 13 and strips 14, 15 are compressed to the non- porous form for strengthening the plate and to provide good conducting paths, the greater part, of the plate being subjected to a smaller pressure to maintain it in the porous state. The plate is formed electrolytically in a bath of potassium hydroxide if silver oxide is required as the active material, or in a chloride solution if silver chloride is required. In an alternative construction a grid of magnesium, nickel, steel or other metal is covered on each side with an ignited sheet of porous silver and the whole compressed to force the silver into the grid some parts being simultaneously highly compressed to form the required non-porous areas. |
