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 standard batteries for cars.
| Identifier | ExFiles\Box 54\1\ Scan082 | |
| Date | 19th January 1926 | |
| X46717 DIRECTORS SIR ARCHIBALD. C. GOLD. F.{Mr Friese} C. GRAHAM MENZIES. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} R.{Sir Henry Royce} N. MINCHIN. WILLIAM PETO. C. R.{Sir Henry Royce} D.{John DeLooze - Company Secretary} PRITCHETT. T. W. PRITCHETT. Telephone No: RAINHAM 34. Telegrams: "PRITCHETT, DAGENHAM" CODES USED: BENTLEY'S, 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. LONDON OFFICE. 50, GROSVENOR GARDENS, VICTORIA, LONDON, S.W.1. Please reply to Dagenham Dock, ROMFORD, ESSEX. Station: Dagenham Dock, (Mid. Rly. Tilbury Section) YOUR REFERENCE OUR REFERENCE KP/4. 19th January, 1926. E.{Mr Elliott - Chief Engineer} Fowler Clark Esq., Messrs. Rolls-Royce Ltd., Derby. Dear Mr. Fowler Clark, re Standard P & R.Batteries for R.R. Cars. Replying to your letter of the 12th inst., I note you have now confirmed that the charging P.D. averages 2.75 per cell on the latest 40/50 battery as against 2.88 on the earlier type and you consider this is only a slight reduction. This reduction in charging P.D., amounting to 0.13 per cell, appears to me to be a big step towards meeting your requirements in this direction, as a further reduction of .06 would bring us to the Exide figure. Answering your query as to the difference between the later cells and the earlier ones, this is entirely due to a modification in the negative active material. With regard to the further alterations required to bring down the charging resistance still more, I am not yet in a position to give you this information owing to the indefinite character of our experimental data. You are quite right in taking it for granted that the three P. & R.{Sir Henry Royce} cells recently obtained for your sandwiching experiments are of the latest type, whereas some sandwich batteries made up as long ago as 11/6/25 would contain cells of the earlier type. -1- | ||