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).
Description of the switchbox settings, ammeter function, and battery connections.
| Identifier | ExFiles\Box 26\2\ Scan352 | |
| Date | 10th May 1930 guessed | |
| -3- Switchbox. Carried on. ......... H, S & T - Head, side and tail lamps on. M & B - Magneto and battery ignition on. This position of the ignition and charge switch is provided to enable running on both ignitions simultaneously to be realised when it is not required for the battery to be on charge. M, B & C ............. ordinary running. M & C ................. of the switch. Ammeter. The ammeter........... 20-ampere range. Electrically, it is so connected as to indicate all currents passing in or out of the battery, except intermittent heavy currents used by the starter system or by any accessory apparatus requiring such a current. A needle deflection to the right indicates charge, and to the left discharge. The dynamo output is thus exactly indicated if no consuming apparatus be switched on (charging switch in M & C position), and if the dynamo be off the current being consumed by the lamps etc. is shown, If both dynamo and lamps or other apparatus be on, the reading gives the balance in or out of the battery. Should the ammeter not show any charging current with the charging switch on, lamps off and dynamo running, confirm by inspection that the battery terminal and cell to cell connections are sound and by trying the head lamps with the charging switch off. If no irregularity be found, inspect the fuses and replace with spare wire or cartridge fuse provided as necessary. In the unlikely......... these carefully. One cause of failure would be the existence .......... the commutator. x Battery & Connections. For detailed instructions concerning the battery as a unit see the battery makers pamphlet inserted at the end of this book. | ||