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).
Summary of seven improvements made to the Exide Battery compared to the previous standard.
| Identifier | WestWitteringFiles\M\2October1924-December1924\ Scan68 | |
| Date | 17th March 1921 | |
| To R.{Sir Henry Royce} & E.{Mr Elliott - Chief Engineer} Extract from:- EPC3/17.3.21 RE BATTERIES. " Exide Battery. This battery has the following improvements as compared with our present standard, which, you may remember, already has perforated ebonite sheets between the positive plates and the wood separators, kinked flexible connectors, also central bolt and packing pieces to offer better lateral support to individual cells. (1) The positive and negative sets of plates are provided with two rows of feet each, making four lines of feet in all, these corresponding to four supporting bridges in the bottom of the ebonite case, so that the positive and negative elements are individually supported. (2) The ebonite separators between the positive plates and wooden separators, which we previously punched with circular holes, are now perforated with numerous horizontal slits, this being considered by the Chloride Co. to be an improvement, giving presumably a greater total area of cross sections of electrolyte through the perforations. (3) The wood separators have been made larger so as to project beyond the edges of the plates and it is now considered that this will render the possibility of short circuits due to buckling of plates to be very remote. (4) The corners of the plates are now rounded instead of being sharp. (5) The negative plates are a little thinner than previously. (6) An improvement has been made in the lugs and in the manner in which these are passed through and secured in the cell lid.{A. J. Lidsey} (7) The sealing in of the cells is effected in a modified manner in which the sealing material is run in after the cells have been placed in the battery (instead of individually), so that the cells are held rigidly by this material, the packing pieces having first been placed at the sides of the cells so the sealing material is only of small depth. This is a Contd. | ||