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).
Comparison of the functionality and reliability of an auto switch versus a green lamp unit and a cutout system.
| Identifier | ExFiles\Box 59\1\ Scan292 | |
| Date | 29th March 1928 guessed | |
| -2- Contd. the correct functioning, i.e. backward and forward motion of the auto switch armature, throws no more responsibility on the makers than the corresponding functioning of the green lamp switch unit which acts in nearly identically the same way, but instead of doing the job on the spot flashes a light at the driver and asks him to do something instead. There is no more likelihood of the auto switch going wrong magnetically than the green lamp, and there can in view of the extra units requires for the latter scheme, scarcely be said to be more electrical complication. (3) The inherent reliability of the part temperature compensated auto switch unit is of a higher order than that of the cutout upon which the correct functioning of the electrical system depends. Further to this, if anything does go wrong with the auto switch it is by no means such a serious matter as if something goes wrong with the cutout. After all, the auto switch is a cutout depending upon system voltage, whereas the ordinary cutout depends on speed. (4) Small original or developed errors of adjustment in the auto switch are not of serious consequence. It is still true that the auto switch is bound to cut in if or when the voltage goes low enough, and is bound to cut out if the voltage goes too high, i.e. with a reasonable initial adjustment. (5) In the green lamp scheme, in the event of a broken connection in the battery or battery circuit, between the ammeter and the side of the emergency fuse and the | ||