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).
Instructions for adjusting the main spring of a relay switch unit.
| Identifier | ExFiles\Box 64\3\ scan0183 | |
| Date | 30th October 1924 | |
| Contd. -2- EFC3/T30.10.24. The following on the relay switch unit is necessary:- (1) Either pack or unpack (which of these is right to be found by trial), the main spring until there is less difference between the pull on the lever in the out and in the 'in' position than there is at present. In other words the effective rating of the spring is too high. It wants to be the equivalent of a spring of lower rating with a bigger set. The contact gaps as at present arranged are reasonably in accordance with the table which we shall given. EFC. | ||