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).
The current taken by a clock at different voltages.
| Identifier | ExFiles\Box 164\1\ img031 | |
| Date | 1st May 1931 | |
| Messrs. Rolls Royce Ltd., DERBY. -2- 1st May 1931. 11. The current taken by the Clock is only 0.13 amp at 6 Volts and 0.24 at 12 Volts and this, of course, is only momentary. On the Voltage falling and the Clock failing to wind, the current taken from the Accumulator would be less than 0.10 amp, but with the big range between 12 and 5 Volts, there would be but small likelihood of the Accumulator getting so low. 0813 | ||