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).
Secret document detailing proposed modifications to improve the oil retaining device on a dynamo drive.
| Identifier | ExFiles\Box 66a\3\ scan0007 | |
| Date | 3rd March 1925 | |
| 48100 R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. SS.{S. Smith} c. Hs.{Lord Ernest Hives - Chair} c. Bv. E19/H.{Arthur M. Hanbury - Head Complaints} 3. 3. 25. SECRET. E.A.C. DYNAMO DRIVE. Please find attached blueprint LeC.2022 showing modifications for improving the oil retaining device on the above, as discussed at Le CanadelHenry Royce's French residence. The alterations proposed are:- A.{Mr Adams} Machining an inclined recess in the cover to form a lip surrounding the shaft, which should collect oil running down the inside of the casing. This should prevent the oil pumping device from being flooded and prevent oil leaks when the engine is stopped. B. Providing an oil flinger on the shaft by altering the nut securing the ball bearing. C. Increasing the area of the drainage passages from the oil retaining chamber. D.{John DeLooze - Company Secretary} Destroying the reservoir in the housing positively draining oil through the ball bearing, and relying on oil splash from the driven gear to lubricate the bearing. E.{Mr Elliott - Chief Engineer} In place of the left hand thread, which at present serves for the nut and the oil retainer, using a rapid pitch square left hand thread for oil retaining and a normal right hand thread for the nut. Fig. 1. shows the design with the above points incorporated. The nut is of hexagon form and is locked by means of a castellated plate and a tab washer, the nut engaging the castellated plate by means of two pins. This nut has been made as large as possible to obtain the maximum effect, but if we can reduce it one size in hexagon, then the simple nut shown in Fig.II. could be applied. Fig.II has been drawn to show the effect of our other standard form of oil retainer, but we do not think it is so suitable for this drive, owing to Con. | ||