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).
The failure of battery plates due to sulphation, treeing, and a resulting short circuit.
| Identifier | ExFiles\Box 54\5\ Scan127 | |
| Date | 18th December 1929 guessed | |
| 2 JD.{J. Draper - Frames}46. of some of the negative plates between the feet, this had caused treeing to take place & cause a leakage path, which eventually caused the positive plates to grow due to sulphate. I noticed this on some of our plates when at the Chloride Co & pointed it out to the man that it was likely to cause premature failure, but he informed me it would be removed in the process of assembly. This is a point which requires watching when grouping or assembling elements. The Threaded Rubber separators were in good condition but were very brittle & had 4 vertical ribs which were facing the positive plate. The depth of sediment was about 3/8". The cause of failure was the fracture of the periphery of one positive plate (due to sulphate) at the top this coming in contact with the underside of the negative strap causing a short, (contd) | ||