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).
Modifications to the chassis make and break lever's pin and continental bakelite bush.
| Identifier | ExFiles\Box 61b\1\ scan0181 | |
| Date | 18th December 1933 | |
| BY/RD. C. Wor.{Arthur Wormald - General Works Manager} c. E.{Mr Elliott - Chief Engineer} c. Sft{Mr Swift} c. Hs.{Lord Ernest Hives - Chair} r6119. BY.6/G.18.12.33. CHASSIS MAKE AND BREAK LEVERS - RE: CONTINENTAL BAKELITE BUSH. --------------------------------- We feel that the only way to overcome this trouble is to give a much increased clearance, whilst at the same time using a stainless material for the pin, and we should instruct the Works to reduce the size of the pin by another .0015, which will give a total positive clearance of .0025. At the same time it will be necessary for the Works to pass a gauge measuring .156 into the continental bakelite bush after reaming. The bush ought not to require considerable effort to slide it on to the gauge. In addition the pin and bush should be liberally treated with Lanoline. In regard to the pin, I think the best solution of this is to make the pin in stainless steel and secure it by a nut from the back. The working part of the pin could then be hardened by carrying it in a small fixture but just above the level of the oil or hot water, and heating up the pin by a small blow pipe flame where it was exposed above the water and quenching. This would form a matter for experiment. For the present, I would suggest a light copper coating on the hardened steel pin to protect it until it got well polished. The coating could be produced by dipping in copper sulphate and washing off in hot water. BY.{R.W. Bailey - Chief Engineer} By | ||