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).
Merits of different carbon brushes and control systems for car dynamos.
| Identifier | ExFiles\Box 179b\1\ img336 | |
| Date | 1st March 1933 | |
| HS{Lord Ernest Hives - Chair}/WST.) FROM R.{Sir Henry Royce} ORIGINAL R1/M1.3.33. C. to SO. WOR.{Arthur Wormald - General Works Manager} PN.{Mr Northey} BY.{R.W. Bailey - Chief Engineer} CAR WORK. ELECTRICAL EQUIPMENT. Young DYNAMO. I am glad you have found some better carbon brushes for dynamos. I sent you a brand that had been found to last well on Royce Ltd. dynamos here and at Le CanadelHenry Royce's French residence (10 to 20 yrs.) They were French - Le Carbon Co. - but someone has gone away from these at sometime, as your notes shew. I could not gather from the memos. whether all of you were referring to 3 brush or vibrator control. Personally I am not interested in 3 brush control because, even with 2 and 3 rate charge and the complex thoughts needed to keep these in their right place, we do not get such good characteristics of running, or good and sparkless cool running from the dynamo. Unless therefore you tell me the reason why we cannot have vibrator control, I shall understand you are fitting at once vibrator control to all our car dynamos, and cease to worry about the wretched narrow 3rd. brush, and its poor life and effect. R.{Sir Henry Royce} | ||