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).
Specifications for sealing Peto & Radford and Exide batteries.
Identifier | ExFiles\Box 38\5\ Scan361 | |
Date | 31th March 1925 | |
X 33987 To Wd.{Mr Wood/Mr Whitehead} from EFC. c. By.{R.W. Bailey - Chief Engineer} EFC6/T31.3.25. X. 4414P. PETO & RADFORD BATTERIES. With reference to your Wd{Mr Wood/Mr Whitehead}2/NJ31.3.25, for a long time now, ever since the Exide started sealing over the tops of the old 40/50 Exide battery, we have not desired of either battery, the cells to be separately sealed in the sense that there are divisions between the cells on the top. Possibly the wording of our Specification is not very explicit on this point, but it has latterly always implied that the cells should be completely sealed over their tops "so as to make a solid top", i.e. no cracks, as distinct from filling up the whole of the interstices between the cells and the case at the bottom. The point was that the cells should be sealed up sufficiently to keep the acid from these interstices but not sufficiently to prevent the easy removal of single cells when desired. This being the case, we do not understand Messrs. P & R's statement that there is a slight gap between neighbouring cells, because in those batteries of theirs which we have, all the cells seem to be completely sealed over as desired and no cracks between cells appear on the top of the battery, at any rate initially. They may develop in time, but it is certainly our intention that the sealing compound shall be of such a nature that the whole battery is effectively sealed over | ||