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).
Diagram with dimensions for a slot in a 45-slot armature for an experimental dynamo.
| Identifier | ExFiles\Box 68\4\ scan0210 | |
| Date | 25th March 1920 | |
| X.3526. EXPt R.R. DYNAMO Width Manilla .020 Tape .010 Insulated conductor .050 Total .080 Depth Clearance .010" Mica .010 Banding .020 Manilla .040 Cotton tape .020 Conductors .600" Total .700" DIAGRAM of SLOT for 45 SLOT ARMATURE Suggestive only DEPTH to be kept down to a minimum E.F.C 25/3/20 | ||