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).
Issues with the unsatisfactory assembly of dynamo brush springs causing commutator sparking.
| Identifier | ExFiles\Box 166\1\ img068 | |
| Date | 6th November 1935 | |
| 86093 By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to Sft{Mr Swift}/Mr.Brock. Hs{Lord Ernest Hives - Chair}/Wst.10/MA.6.11.35. DYNAMO BRUSH SPRINGS. We regret to note that dynamo brush springs are still not being satisfactorily assembled on dynamos, the springs usually being too long so that the bent portion clamping on the brush is too far over the brush bevel to correctly seat the brush on the commutator. We have seen some brush which are particularly bad in this respect. We should be glad if you will take steps to ensure that dynamos are put right in this respect as it materially affects high speed commutator sparking. Hs{Lord Ernest Hives - Chair}/Wst. | ||