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 a battery manufacturer regarding a harmless red stain observed on new separators in FA 11 cells.
| Identifier | ExFiles\Box 61\1\ scan0053 | |
| Date | 29th August 1928 | |
| X9065 DIRECTORS. SIR ARCHIBALD. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} GOLD. WILLIAM PETO. F.C.GRAHAM MENZIES. C.R.D.PRITCHETT. G.R.N.MINCHIN. T.W.PRITCHETT. Telephone Nº RAINHAM 34. Telegrams: "PRITCHETT, DAGENHAM". CODES USED: BENTLEYS, OR A.B.C. 5TH EDITION. PRITCHETT & GOLD AND E.P.S. COMPANY. LIMITED. WITH WHICH IS INCORPORATED THE BUSINESS OF PETO & RADFORD. ESTABLISHED 1882. MANUFACTURERS OF STORAGE BATTERIES. Please reply to Dagenham Dock, ESSEX. LONDON OFFICE. 50, GROSVENOR GARDENS. VICTORIA, LONDON, S.W.1. Station: Dagenham Dock, (Mid. Rly. Tilbury Section.) YOUR REFERENCE OUR REFERENCE KP/5. 29th August, 1928. Messrs. Rolls-Royce Ltd., Derby. EFC Dear Sirs, R.R. Batteries. We thank you for your letter EFC4/T of the 24th inst. handed by Mr. Minchin to the writer, and are pleased to note that you are in full agreement with the various proposals for modification of the above. FA 11 Cells. The point you refer to regarding the appearance of a red stain since fitting the new wood and ebonite separators, is no cause for alarm as the red or violet coloration is harmless in character and is due to minute traces of manganese contained in the acid or derived from the packing. This manganese is converted into permanganic acid by electrolytic action when the battery is charging and is quite innocuous and will disappear in course of time as the battery is worked. Yours faithfully, For PRITCHETT & GOLD and E.P.S. Co.Ltd., J.{Mr Johnson W.M.} Preston. | ||