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).
Circuit diagram for connecting compensated ampere-hour meters from The Central Mfg Co., Walsall.
| Identifier | ExFiles\Box 54\2\ Scan226 | |
| Date | 24th May 1928 guessed | |
| The Central Mfg Co., Walsall CONNECTIONS FOR AMPERE-HOUR METERS (COMPENSATED FOR VARIATION OF CHARGE RATE) CS CO D +D C BATTERY CAPACITY MEDIUM RATE 0 10 20 30 40 50 60 70 AMPERE-HOURS VAR'N RATE IN SER'S IN LINE BATTERY D.H. L | ||