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 Peto & Radford concerning the increased thickness and cost of ebonite battery separators.
| Identifier | ExFiles\Box 54\5\ Scan029 | |
| Date | 25th August 1925 | |
| X.4655 COPY OF LETTER RECEIVED FROM:- PETO & RADFORD, 50, GROSVENOR GARDENS, LONDON, S.W.1. Ref. M {Mr Moon / Mr Moore} /7. 25th August, 1925. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, With regard to the Conference held here on the 16th July last on the question of separators for your batteries, at which Mr. Fowler Clark was present, we regret that so long an interval has elapsed before we are able to write you in full. Without going into all the details of the tests you and we have carried out and the arguments put forward, it was unanimously decided that the ebonite separators should be increased in thickness at the expense of the wood and that improved results are bound to follow this change. Ever since then we have been in continuous correspondence with suppliers of the special flat perforated separators that you use. Unfortunately the very hard high quality ebonite that is used in your separators is not made in any greater thickness (.4 mm.) than you have been having and it was decided that in future they were to be not less than .6 mm. We have at last got the best quality suppliers to put a proposition before us for the supply of these in about 2 or 3 months time. Owing to the rise in the cost of rubber and the fact that there will be 50% more in the new separators, the extra cost to us will be approximately 5/- per battery in the case of the 40/50 H.P., and approximately 3/- in the case of the 20 H.P. Contd. | ||