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 the charging process of a cell, voltage readings, and the function of a cadmium electrode.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan264 | |
| Date | 7th September 1925 guessed | |
| -4- Contd. wrong to some extent, the other must be on the right side to the same extent. In the process of charging a normally good cell, the positive element will gradually increase from 2.05 volts positive before charging, to 2.50 volts positive at the end of charge, whilst charging. At the same time the negative element will become less positive than .25 volts and, passing through the same potential as the cadmium electrode, will probably become negative to that electrode to the extent of .3 volt. Although an electrical weakness of a cell when in some higher condition than discharged and discharging (1.80 volts) may, after some experience, be judged, from the reading of the instrument (i.e. excluding broken lugs, etc.) nevertheless the principal utility of the cadmium electrode will be apparent when the cell has reached a P.D. of 1.80 volts on discharge, for then the readings are definitely right or wrong. RFC. | ||