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).
Letter from Pritchett & Gold and E.P.S. Co. Ltd. discussing battery separator performance experiments.
| Identifier | ExFiles\Box 54\5\ Scan059 | |
| Date | 2nd February 1926 | |
| -2- E.{Mr Elliott - Chief Engineer} Fowler Clark Esq. 2nd February, 1926. Our experiments Have also shown that wood separators ribbed both sides give a better performance at high discharge rates than separators only ribbed one side. The enclosed curves indicate that the best performance is given with .4 m/m ebonite and wood separators ribbed both sides. The "Exide" performance was obtained on a loan battery which has had a fair amount of service; I am obtaining a new "Exide" which may show better results. It should be remembered that the inferior performance with .6 m/m ebonite would be accentuated at electrolyte temperatures below the normal and I would suggest for your consideration that a combination of .4 m/m perforated ebonite and 2.5 m/m wood separators ribbed both sides provides an effective separation with maximum efficiency. Having regard to the fact that we can meet your requirements regarding the charging P.D. and effect an improvement in the high discharge performance, I shall be glad to have your comments. Yours sincerely, For PRITCHETT & GOLD and E.P.S. CO. LTD. F.{Mr Friese} Preston. | ||