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).
Technical description of coil construction and insulation.
| Identifier | ExFiles\Box 69\1\ scan0071 | |
| Date | 7th January 1928 guessed | |
| -2- Contd. current. The construction of the coil with the inside secondary and outside primary is such that the circuit is largely closed by the magnetic casing into which the coil is finally sealed; this being at low potential it appears that the two gaps between the core and this magnetic casing are sufficient only for due insulation against the H.T. of the core. EFC. | ||