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).
Instructions on charging the vehicle's battery in a garage from an external source.
| Identifier | ExFiles\Box 26\2\ Scan163 | |
| Date | 1st August 1919 guessed | |
| -13- CHARGING IN GARAGE FROM EXTERNAL SOURCE. A direct current supply is necessary for charging purposes. An alternating current supply may only be made use of in connection with suitable rectifying apparatus. It is possible to charge the battery in position on the car from such a source, making use of a plug, as previously described, supplied by Messrs. Lucas to fit the socket on the Lucas switchbox. This plug can only be inserted one way round in the switchbox, hence when once the connections at the other end of the flexible to which the plug is attached are correct in polarity correct direction of current is ensured. The charging current must necessarily be supplied through lamps, preferably carbon filament, arranged to act as resistances. If there is any doubt as to the correct direction of current this can be determined by temporarily reversing the ends of the flexible wire at the charging or lamp board. When the direction of current is right, the lamps will be lighted less brilliantly than when the direction is wrong, or no battery is being charged. Another method is to use pole-finding paper, but whichever way it is done, be certain that the direction is right. The number of lamps in circuit must be suitably adjusted to allow the flow of the required charging current. Contd, | ||