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).
Page detailing procedures and considerations for battery charging, both in the car and from an external source.
Identifier | ExFiles\Box 26\2\ Scan366 | |
Date | 14th June 1920 guessed | |
-4- In such a case of failure, the makers of the battery should be consulted. It should be understood however, that failure is considered most unlikely within a period of three years' service, if proper care be taken of the battery. {The same remarks apply to this paragraph as to the previous paragraph.} {In regard to your present paragraph (16) Charging in position on the car, our suggested re-arrangement includes the deletion of this from your pamphlet in its entirety because this is fully covered by the matter to be contained in our own Chapter III entitled "Charging in position from external source" which matter you will find included in the additional sheets given for your information.} (18) Charging in Garage from External Source. {Our proposal for this paragraph is a combination of matter contained in our present Chapter IV and the matter, with diagrams contained in your present paragraphs (17) (18) (19) and, (20). We think you will agree that it is an improvement.} "A unidirectional current is necessary. If the supply be alternating, suitable rectifying apparatus must be used. There are reliable types of valve and metal rectifier apparatus of suitable ampere capacity on the market. Instructions for the operation of these will normally be supplied by their makers. If the current from the public supply main, or other source, be direct, the charging current must necessarily be supplied through a suitable switch and a variable resistance, or set of lamps, preferably carbon filament, suitably arranged to act as a variable resistance. Before connecting up the battery for charging purposes, it should be confirmed that the resistance is in the main showing the higher potential to earth, i.e. that one terminal of the battery is in direct connection with the earthed main. The mains may be tested by connecting a wire from a water pipe or other earth to a lamp of "mains" voltage, the other wire from the lamp being connected to each of the mains in turn (fig.2.) (This referring to your diagram fig.2.) (Be particularly careful not to short circuit the mains when testing in this manner. | ||