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).
Letter from Desmo Limited discussing the design of covers for a brake adjustment mechanism.
| Identifier | ExFiles\Box 84\2\ scan0086 | |
| Date | 9th January 1934 | |
| COPY. DESMO LIMITED, STAFFORD STREET, BIRMINGHAM, 4. 9th January, 1934. Your Ref: Hs{Lord Ernest Hives - Chair}/Bwg.{J. C. Bowring}14/KW. Our Ref: WP/HMD. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, Replying to your communication of the 29th December, regarding Covers for your Brake adjustment mechanism, a design of which we submitted to you on our drawing Sk.104/33, we have expended a considerable amount of time in endeavouring to give you an assurance that the two points you raised could be satisfactorily dealt with. However, we cannot find a better design than that already submitted, and we feel sure you will appreciate the difficulties to be overcome, the greatest of which is the lack of room. In dealing with the two points raised, we fully appreciate the very small hole in the cover through which the end of the lever has to pass, but we are sure from past experience that this will not prove as difficult as it apparently seems. The mixture of rubber that we use is sufficiently flexible to allow for this operation, but we do think it would be much better if the small sleeve were made thicker. This would then enable this part to return to its normal position on the lever. Query No. 2. We must agree with your remarks that a certain amount of distortion will occur when the Brake adjustment is taken up, but we do not anticipate that this will be sufficiently large to enable water and grit to enter, and as is the general custom with covers which completely enclose any moving mechanism, we always advise that they are reasonably packed with grease. We do not think, however, that there should be a great deal of distortion until the adjustment is nearing its end, but of course you will fully realise that until actual road tests have been given, a definite ruling on any of these points could not be given. | ||