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).
Historical and new suggestions for coil design, materials, and manufacturing.
| Identifier | ExFiles\Box 45\4\ Scan209 | |
| Date | 12th November 1923 | |
| X40796 To EFC. from R.{Sir Henry Royce} EY. R7/M12.11.23. c. CJ. X.4079.b RE COILS. X.4596. A very long time ago we spent much time in improving the coil between us, Mr. Clark having suggested that the bakelite case could be used if the coil was longer, with more clearance between the outer layer of the secondary, and the inside of the case, which could be left open filled with suitable material possibly mica and wax; (nothing done finally). It appears we could always use the bakelite fittings so that there need only be the main piece in stabalite (New suggestion by me). When we have heard that you wish to use stabalite (of which there was difficulty in finishing after vulcanising) we designed and arranged for a circular case with a circular base which could be more easily finished in a machine than the present square base. Nothing was done with all the above. We find the job has fallen flatly to its old expensive condition. Kindly explain. EFC R.{Sir Henry Royce} | ||