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).
Use of a Bostock & Bramley worm gear for the servo system to handle heavy loads.
| Identifier | ExFiles\Box 16\3\ Scan019 | |
| Date | 2nd February 1928 | |
| DA.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to BJ. Wor.{Arthur Wormald - General Works Manager} 47370 R3/M2. 2.28. EAC.10 SERVO WORK. X.7370 X.2061 In the gearbox integral with the engine this has been arranged direct drive like the 20 HP. Owing to the occasional very xx heavy load on the teeth I send Mr. Bailey the suggestion that we might use a Bostock & Bramley worm which gives a worm that will carry a much larger load before the oil film breaks down. Since this is an economical scheme, but caused some trouble on the 20 HP. I suggest that to save time, and the risk of disappointment, we at once get Bostock & Bramley to make us a pair of their wheels, or cut ours to their shapes. Probably they would put us in the way of cutting our own at a small royalty on the pair of wheels. We are very anxious that all our parts shall wear well without getting slack, which would probably result in some noise. R.{Sir Henry Royce} | ||