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).
List of modifications and improvements continuing a standard sheet, likely for a battery.
| Identifier | ExFiles\Box 172\3\ img039 | |
| Date | 21th March 1921 | |
| R.R. 253a 100 T.S.H.39a. 10/12-30. G.F.18 Continuation of Stdd. Sheet. 21.3.21. (2) Slotted ebonite sheets between wood separators and positive plates (in place of sheets with circular holes). (3) Larger wooden separators projecting beyond edges of plates. (4) Rounded corners of plates. (5) Slightly thinner negative plates. (6) Improvement in lugs and passage of lugs through cell lid.{A. J. Lidsey} (7) Partial sealing in all cells at the top to ensure further rigidity. | ||