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).
Design and implications of a combined cut-out and vibrator regulator.
| Identifier | WestWitteringFiles\E\June1920\ Scan39 | |
| Date | 1st June 1920 | |
| To EFC. from R.{Sir Henry Royce} Copy to C.J. " " PN.{Mr Northey} ORIGINAL R8/G25/6/20. X.4148 RE COMBINED CUT-OUT AND VIBRATOR REGULATOR. X.1369 I thank you for your memo with reference to the combined cutout and vibrator regulator. I think it is a long time since this was first combined on one core, and I consider that we should be perfectly free to use such an arrangement. The duty of the coarse wire as a means of operating the cutout, and compounding the regulator is, I think, quite advantageous, and is in accordance with the wishes stated in my correspondence many years ago. I believe there will be some slight advantage in continuing the single core, and using both ends because the movement of the cutout armature will probably take place before the vibrator will operate, because the reluctance of the magnetic circuit will be reduced owing to the cutout armature moving nearer to its core. As regards the disadvantage of the compounded regulator, in the case of running without a battery one feels as though the side lamp and back lamps of the car should be for a slightly higher voltage than the front head lamps, because these might be on the dynamo alone or on the cells alone during charging, when the voltage would be at its highest, whereas the pair of head lamps would always take considerable current (not less than four amperes) and therefore the voltage would be lower. Upon these lines it might be advisable to have the head lamps suitable for 13 or 14 volts and side and tail lamps (Contd.) | ||