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).
Cover page for the J. & P. A.C. to D.C. (full wave) converter.
| Identifier | ExFiles\Box 32\5\ Scan015 | |
| Date | 1st October 1922 | |
| x1589 October, 1922 The J.{Mr Johnson W.M.} & P. CONVERTER A.C. to D.C. (full wave) Logo text: ELECTRICAL ENGINEERS J P CABLE MAKERS Text on converter unit: J P CONVERTER Bottom caption: The J.{Mr Johnson W.M.} & P. Converter connected up to and charging a motor-car battery Stamp: R - D NOV 1922 | ||