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).
The proposed design and experimentation of an iron core coil to improve spark utility.
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan81 | |
| Date | 5th May 1925 | |
| Contd. -2- EFC2/TRO.5.25. closed circuit type of coil somewhere, having observed sparks of greater utility (capable of overcoming leaky gaps) from such coils, though he does not express a definite opinion as to exactly where the advantage comes in. Taking everything into consideration, however, we do think that we ought to experiment with such a coil and we shall be pleased if you will do as you suggest, namely, design such an iron core coil constructionally, when we can make the necessary experiments of varying the windings. EFC. | ||