Adjustment to the operating and fall-back voltage of a green lamp switch.
| Identifier | WestWitteringFiles\T\November1928\ Scan078 | |
| Date | 12th December 1928 | |
| To R. {Sir Henry Royce} from EFC. {E. Fowler Clarke - Electrical Engineer} c. BJ. E. {Mr Elliott - Chief Engineer} By. {R.W. Bailey - Chief Engineer} c. Wor. {Arthur Wormald - General Works Manager} ORIGINAL EFC {E. Fowler Clarke - Electrical Engineer} 3/T12.12.28. GREEN LAMP SWITCH. Further to our EFC {E. Fowler Clarke - Electrical Engineer} 4/T3.12.28 we now think we can overcome this trouble by adjusting the green lamp switch to fall back off contact at a voltage on its coils which is less than the voltage to operate it by a smaller amount than at present. At present it is adjusted to operate at about 16.8 volts and fall back at about 10.0 volts. EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).