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 condition of wood and ebonite separators within battery cells.
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan30 | |
| Date | 8th April 1925 guessed | |
| -3- Contd. The wood separators in these cells (no ebonite) were double ribbed in the 7-plate, and single ribbed in the 9-plate, the ribs being adjacent to the positive plates. The separator condition was practically the same in each case, some being punctured by the pressure of positive plates due to buckling, others being thin in places but otherwise strong. It can be said definitely that in each case the wood separators have let the cell down by allowing contact by pinching through the wood. This proves to the hilt the necessity of the addition of ebonite separators. (Ab) (Cells 1 & 3 and 4 & 6.) Depth of sediment approx. 3/8" in each case, also as before, slightly more for the 7-plate section. The remarks re comparison of the thick and thin positive plates in (Aa{D. Abbot-Anderson}) above are again applicable, and the same also applies to the comparison of the negative plates. None of these four cells have actually failed; the condition of the wood separators was equally good in the two cases, not apparently depending on the thickness of the plates. The condition of the ebonite separators was not too good, the ebonite being eaten through in places, this remark applying to all four cells. The ebonite separators are in contact with the positive plates and though apparently shielding the wood from the damaging action of these plates, they have themselves suffered in the process, in such a way as distinctly to | ||