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 accumulator manufacturers Peto & Radford regarding the thickness and design of battery separators for 40/50 HP cars.
| Identifier | ExFiles\Box 54\5\ Scan078 | |
| Date | 18th March 1926 | |
| X.4655. Works, Dagenham Dock, Essex TELEPHONE VICTORIA 3667. 3 LINES PRIVATE BRANCH EXCHANGE. TELEGRAMS CONCENTRATION, SOWEST, LONDON. Manufacturers of P&R Accumulators. Established 1889 PETO & RADFORD Proprietors - Pritchett & Gold and E.P.S. Company Ltd. 50 GROSVENOR GARDENS, LONDON, S.W.1. DIRECTORS: SIR ARCHIBALD C. GOLD F.C. GRAHAM MENZIES G.H.N. MINCHIN WILLIAM PETO C.R.D. PRITCHETT T.W. PRITCHETT YOUR REF.______ OUR REF. M/5. 18th March 1926. E.{Mr Elliott - Chief Engineer} Fowler Clark Esq., Messrs. Rolls Royce Ltd., DERBY. Dear Fowler Clark, In reply to yours of the 16th inst., I have now had a letter from Mr. Preston on the subject of the separation. We have been looking into this with the desire to carry the separators above and below the plates so that they do not end just level with the plates but can overlap a little bit, which is very much better if there is a slight buckling of the plates. With plates having feet it is more easy to arrange this than with ones having notches cut in them, but we are looking into it with a view to trying to get over the difficulties. We obtained one of the very latest Exide 2-volt 40/50 H.P. Rolls Royce batteries and have been making comparative tests and have examined it. Mr. Preston points out that this contains slotted separators but that they are .38 m/m thick not .5 m/m as stated by you. More careful examination of our .4 m/m shows that these are only .38 m/m in actual practice. In view of the Exide separation being thinner than you thought, we feel that we should have further comments from you on the subject before we go any further. You may want to verify this figure by examining a battery or asking the Exide Company, but this is what we found in one of their latest cells. With regard to the voltage rise, I think Mr. Preston has got to the bottom of this but he wants to make sure that in | ||