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).
Extract from a written note regarding the timing and mechanical interlock of a magnetic switch unit.
| Identifier | ExFiles\Box 64\4\ scan0116 | |
| Date | 8th December 1928 | |
| X.765573 Extract from written note from R.{Sir Henry Royce} dated 8.12.28. We have sent the proper timing of the contact on the magnetic switch unit - our original clearances were wrong - the point is that the mechanical interlock mustbe that the main switch movement carries the hold on armature sufficiently far to be sure that it makes the hold on circuit by its contact and that the movement of this armature breaks the teazer circuit. EFC. is not correct if he wishes the main switch to cause the hold off to break the teazer before it makes the main circuit. These can and should overlap by the carbons. | ||