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).
Modifications and improvements for dynamo and motor armature windings.
| Identifier | WestWitteringFiles\G\October1921\ Scan54 | |
| Date | 10th October 1921 | |
| To Brock from R.{Sir Henry Royce} Copy to C.J. [strikethrough] EPC. [strikethrough] HS.{Lord Ernest Hives - Chair} [strikethrough] ORIC.... R7/G10/10/21. 6. X.4383 RE DYNAMO AND MOTOR ARMATURE WINDINGS. X-1640 X4384 Speaking generally, I am very pleased with the specimen windings. I think there will be little difficulty in getting these to give satisfaction. There is, however, one little point in the model for the dynamo which could be modified, and that is, the inside end of the coil should come out between the coils going to the bottom and underneath the winding. It would also appear necessary that we fitted some form of hub, say, an aluminium flange inside the ends to support the winding. This flange would be covered with insulating tape, and possibly mica. I also notice that the motor has the end connections slightly differently arranged to the generator, the generator wires coming straight out whereas the motor wires are spirally outside the band. It is highly desirable that all the flexibility possible should be obtained between the commutator and the armature, that the end winding shall be true and solid, and that the commutators will be tight on the shaft so that this latter shall not move about relative to the armature core. You will remember that the commutator fits a taper portion of the shaft, which should facilitate our getting it on tightly. We are not proposing to return the models unless you want them. Unless the end winding is solid, the bands on the end of the winding are liable to creep along and come off, possibly some extra precaution can be taken to prevent the possibility of this happening, (which would mean a failure of the machine) band nearer armature core and in a waist, Examine best specimens of other makers. R.{Sir Henry Royce} | ||