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).
Comparison of ebonite and wood separators of varying thickness in battery cells.
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan29 | |
| Date | 8th April 1925 guessed | |
| -4- Contd. suggest that ebonite separators a good deal thicker, at the expense of the wood, would be a better job. As in (Aa{D. Abbot-Anderson}) above, comparison of the thin and thick plates, though rather inconclusive, seems in favour of the thin plates. (Bc) (Cells 1 & 3 on the one hand and 2 on the other). This comparison deals only with Pelate sections or thin plates. The wood separators in these cases are ribbed on one side only, i.e. that against the positive plate, and are .085" thick. Used alone they get very thin and worn in places, and in some cases definitely puncture. The combination of wood and ebonite separators is .095", .080" wood and .015" ebonite. As already stated the combination preserves the wood from wear, though the ebonite itself gets badly eaten through in places. So much so that it was fairly clear that thicker ebonite at the expense of the wood would be an advantage, though it was noticed that a certain amount of positive paste was clogging in the ebonite separators. (Bd{Mr Berend}) (Cells 4 & 6 on the one hand and 5 on the other). This is a comparison of cells containing 7-plate sections only. These are ribbed on both sides and are .115" in thickness. The combination of wood and ebonite separators is .140" thick, .125" wood and .015 ebonite. | ||