| 摘要 |
1,115,146. Electrolytic capacitors. GENERAL ELECTRIC CO. 18 Jan., 1967 [7 March, 1966], No. 2770/67. Heading H1M. Cover member 11 sealing casing 2 enclosing electrolytic capacitor 3 is sufficiently flexible to conform to the shape of the casing, a flange 15 of which is rolled over the upper acute-angled peripheral edge of the cover member to hold it between the flange and a bead 13 on the casing wall. The tendency of the sharp edge, rounded by conforming to the shape of the rolled flange, to return to its original pointed shape provides a hermetic seal. The cover member is preferably of injection-moulded polypropylene, and it may include a venting means 29 comprising a recess which leaves a thin-walled portion which will rupture when a predetermined pressure is exceeded. |
