| 摘要 |
832,406. Batteries. NING, T. July 17, 1958 [Aug. 8, 1957], No. 25064/57. Class 53. A dry cell comprises a cup-shaped electrode 26 enclosed in an insulating casing 14, the base 15 of which is provided with an opening 17 through which contact with the base of the electrode 26 is made by a corrugation on a terminal plate 27. A second corrugation 29 surrounds the opening 17 and helps to keep the base 15 pressed against the bottom of the electrode. The base 15 and plate 27 are held in position by folding over and bending inwardly the lower end of the cylindrical wall of the casing. The rim of the plate 27 is provided with slits to enable it to be folded and bent. The upper end of the casing is continued over the rim of the electrode 26 to form a closure 16 in which an opening 18 is formed to expose the electrode 12. A fluid-tight seal is made round the opening 18 by the terminal plate 20 which is formed with a flange 22 which surrounds the inner wall of the opening 18 and makes contact with the top of the electrode 12. The plate 20 is held in position at its rim by insulation 25. Fig. 3 shows a modification in which the top of the cell is bent inwardly as shown at 41. Expansion of the cell contents presses the part 41 upwardly, air being expelled from the upper part of the cell through openings in the terminal plate 39. A bead 38 in the outer electrode limits downward movement of the plate 39 when the rim 35 of the casing is bent inwardly. Fig. 4 shows a modification in which the rim 58 of the outer electrode is folded over a plastic disc 57 above which is a space enclosed by the top 66 of the casing which is pleated as shown at 65 and provided with a tubular extension 67 closed at the upper end. A terminal plate 54 seals the opening in the casing above the central electrode. Gas evolved in the cell causes the pleats to expand as shown at 66. The gas may be released by opening the tube 67. The terminal plate 55 at the bottom of the cell is provided with a corrugation 62 which makes contact with the bottom of the outer electrode. The plate 55 is secured in position by a plastic ring 63 sealed to the casing of the cell. |
