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 manufacturer Peto & Radford regarding test results of a 3-RRN11 battery.
| Identifier | ExFiles\Box 58\3\ Scan193 | |
| Date | 12th March 1931 | |
| X6054P: Manufacturers of P. & R. {Sir Henry Royce} Accumulators. ESTABLISHED 1889. PETO & RADFORD Proprietors:-Pritchett & Gold and E.P.S. Company, Limited. DIRECTORS SIR ARCHIBALD G. {Mr Griffiths - Chief Accountant / Mr Gnapp} GOLD. F. {Mr Friese} C. GRAHAM MENZIES. C R. {Sir Henry Royce} D. {John DeLooze - Company Secretary} PRITCHETT. G. {Mr Griffiths - Chief Accountant / Mr Gnapp} R N. MINCHIN. T. W. PRITCHETT. WILLIAM PETO. LONDON OFFICE 50, GROSVENOR GARDENS VICTORIA, LONDON. S.W.1. Please reply to the WORKS at DAGENHAM DOCK, ESSEX. Station: Dagenham Dock, (L.M.S. Rly. Tilbury Section). TELEPHONE No.: RAINHAM 34 (3 Lines.) TELEGRAMS: PETO RADFORD DAGENHAM YOUR REF EFC {E. Fowler Clarke - Electrical Engineer} 2/AD. OUR REF CGFP/GL. {G. Linnett} 12th. March 1931. [STAMP: RECEIVED 13 MAR 1931] Messrs. Rolls Royce Ltd., DERBY. For the attention of Mr. Fowler-Clark. Dear Sirs, In reply to your letter of the 10th. inst. about the 3-RRN11 test battery having the modified negatives,which we submitted to you last November, we are extremely surprised to learn that you find from your tests that the maximum P.D. on charge is not lower than the standard. You do not mention what the actual P.D.was and we are wondering whether you have been comparing it with a standard battery which has seen considerable service either in your laboratory or elsewhere. We mention this because it would be possible for a standard battery in certain conditions of duty to have a maximum P.D. lower than that of a new battery having the modified negatives. With regard to the frothing, we can only suggest that it has been caused by some accidental contamination of the electrolyte. It is, of course, obvious that the modified negative grid is not in any way responsible. With reference to your final paragraph, the National Accumulator Co. at Great Portland Street is the selling organisation for our Portable batteries, and all matters connected with the sales side should be addressed to them. All technical matters however, such as the particular item in question, should be addressed to us here as in the past. Yours faithfully, PETO & RADFORD. [Signature] | ||