| 摘要 |
731,494. Batteries. GRAVESTOCK, V. R. June 29, 1953 [Oct. 3, 1952; March 12, 1953], No. 18011/53. Class 53. A device for automatically maintaining the acid level in an accumulator consists of a reservoir 1 having a screw-threaded boss 3a which is provided with an opening 12 leading to a tubular extension 3b of smaller diameter than the boss. A tube 8 having openings 10 is slidable in the tubular extension 3b. A vertical groove in the boss 3a leading to a horizontal groove 13a allows gas to escape from the accumulator. |
