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).
Suppliers and design improvements for an integral gearbox servo worm drive.
| Identifier | ExFiles\Box 15\5\ Scan026 | |
| Date | 24th November 1927 | |
| 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} c. to DA{Bernard Day - Chassis Design}/HDY.{William Hardy} X7310 R5/M24.11.27. EAC.10 INTEGRAL GEARBOX SERVO X.7310 WORM DRIVE. X.7370 X.2061 Mr. Bentley of Royce Ltd., has given me the following name as having produced some worm gears having considerable merit for load carrying capacity:- Messrs. Bostock & Bramley, (In association with Joshua Buckton & Co.Ltd, Well House Foundry, Leeds), Power Transmission Engineers, Netherton, Huddersfield. You will see in our new designs for the gearbox that we have altered the servo drive to direct instead of double reduction. This will throw a heavier load on the worm teeth so that it may be necessary for these to be of the most efficient form to avoid excessive wear and backlash. Will you kindly take the matter up with these people, and if you think it advisable, let them cut the few first sets for the new gearboxes. Amongst the other workers on worm gears are of course Lanchester, and Browns of Huddersfield. The latter were fitting one of our cars with a worm back axle. Apparently however this latest comer has got a scheme which is different to either of these, and seems to consist of making the worm teeth a convex curve instead of an acme type, and seems to result in a decidedly superior load carrying contact. R.{Sir Henry Royce} | ||