From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Instructions for the initial charge of an ebonite battery received unfilled with acid.
| Identifier | ExFiles\Box 26\2\ Scan153 | |
| Date | 1st August 1919 guessed | |
| -3- INITIAL CHARGE OF EBONITE BATTERY RECEIVED UNFILLED WITH ACID. First examine the battery and see that all terminals and connections are properly greased to prevent corrosion. Slight corrosion may occur on the positive terminals of each cell and on the washers under the terminals, in contact with the top of the battery. Examine such parts particularly and if any uncertainty exists about the greasing of these, the washers and corresponding terminal nuts and connections should be removed and given a bath in molten vaseline. When replacing see that all terminal nuts are firmly screwed up. Fill each cell carefully with best battery acid of density 1350 to ¼" above the tops of the plates, taking care not to spill acid on the top of the battery. After filling, replace stoppers. If it be necessary to prepare the acid electrolyte take best brimstone sulphuric acid free from contamination of iron or arsenic and having a density of 1835, and pour it slowly into distilled water in a leaden or non-metallic vessel, stirring meanwhile with a glass rod until a density of 1350 is secured when the mixture is quite cold. Never pour water into the acid, but always acid into water and do this very slowly, in order to avoid the excessive and dangerous rise of temperature. Allow the mixture to cool to below 80ºF before use. Contd. | ||