| 摘要 |
574,538. Stoppers. CHLORIDE ELECTRICAL STORAGE CO., Ltd. (Woodbridge, J. L.). Aug. 11, 1944, No. 15371. [Class 125 (iii)] [Also in Group XXXVI] A battery stopper which prevents the egress of electrolyte when the battery is inverted comprises a chamber 18 which can be screwed into the filling opening of the battery and is in communication with the battery through a tube 23 which terminates in ducts 24 leading to a point near the top of the chamber. Ducts 31 lead from a point near the middle of the chamber to the atmosphere either directly or through a chamber 27 and vent 30. Capillary tubes 33 lead from the bottom of the chamber 18 to the interior of the battery. When the battery is inverted electrolyte flows through the tube 23 into the chamber 18 in which it rises and closes the ducts 24 thus preventing further flow of electrolyte. A small amount of electrolyte may flow into the tubes 33 but their diameter is sufficiently small to prevent the passage of air into the battery. When the battery is inverted to its normal position the liquid in the chamber 18 drains back into the battery through the tubes 33. In order to prevent drops of electrolyte from clinging to the walls of the tubes and ducts 23, 24, 31 and so impeding the egress of gas from the battery, these tubes and ducts may be made of polystyrene or other material which is not wetted by the electrolyte. The tubes 33 should however be wetted to provide the necessary surface tension to prevent the flow of air through them when the battery is inverted. The tubes 33 may be filled with glass wool to provide a number of capillary passages, or with porous porcelain or a mass of sintered glass particles. If the base 16 of the device is of a non-wettable material the tubes 33 may be lined with a wettable material such as capillary glass tubing. |
