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 discussing proposed modifications to battery separators.
| Identifier | ExFiles\Box 54\5\ Scan083 | |
| Date | 15th April 1926 | |
| X4655 Works, Dagenham Dock, Essex TELEPHONE VICTORIA 3667. 9 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.I. DIRECTORS: SIR ARCHIBALD G.{Mr Griffiths - Chief Accountant / Mr Gnapp} GOLD F.C.O.GRAHAM-MENZIES G.R.N.MINCHIN WILLIAM PETO C.R.D. PRITCHETT T.W. PRITCHETT. YOUR REF. OUR REF. M/5. 15th April 1926. E.{Mr Elliott - Chief Engineer} Fowler Clark Esq., Messrs. Rolls Royce Ltd., DERBY. Dear Fowler Clark, Re Separation. With further reference to my letter of March 18th, I have now got agreement from all concerned at the Works after the result of several tests and it is proposed to rib the separators on each side which will give more acid in each cell and lower the resistance slightly. There is, of course, rather less mechanical strength but we are proposing to carry the ebonite separators 1/8" below the bottom of the plates by notching them so they will go over the bottom rests, and carry them 1/8" or 1/4" up above the top of the plates which will help to prevent short circuiting if there is the least sign of buckle. If the ebonite separators were carried 1/4" above the top of the plates it would form a ready guide as to the level for the electrolyte, and instead of telling the owner to keep the level 1/4" above the plates one could say level to the top of the ebonite separators extending above the plates which would be a much easier guide for him and would show up more quickly when the cell needed extra solution. We are waiting before we do anything of this sort until we have your comments. It seems as if there is a general desire to return to the .4 m/m separation, which I am telling the Works they can do but I am making up a composite battery for my car which I intend to run to destruction, some cells having .4 m/m and some .6 m/m | ||