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 J. & A. Hillman Ltd. outlining the advantages of their patented 'Hillman Cebon' fan belts.
| Identifier | ExFiles\Box 135\1\ scan0171 | |
| Date | 15th August 1938 | |
| 1135 HILLMAN DUDLEY J.{Mr Johnson W.M.} & A.{Mr Adams} HILLMAN LTD. RUBBER MANUFACTURERS. DUDLEY PROPRIETORS & SOLE DISTRIBUTORS FOR THE PORTLAND PACKING & RUBBER CO. TELEPHONES: DUDLEY 2476 (3 LINES) TELEGRAMS: "HILLMAN DUDLEY" Ref:- AHS/EH/JRT. 15th August 1938. Messrs. Rolls Royce Ltd., Derby. Dear Sirs, For the attention of the Chief Designer. May we bring to your notice the advantages of our Hillman Cebon Special Construction Fan Belts Patent No. 390340, by which construction we claim:- (1) Maximum strength and minimum stretch, due to the use of superfine cord fabric at the neutral axis, where it is never subjected to fluctuation of tension, and specially built up of one piece of material and of the desired section. (2) Great flexibility due to the resiliency of the rubber above the neutral axis, which takes the extension, and the rubber below the neutral axis, takes the compression when the belt is actually running round the pulleys. In this respect it is such superior to belts having fabric, either woven or weftless in the place of these rubber layers above and below the neutral axis. (3) Freedom from settling into the pulley groove due to the large amount of cord fabric in the centre core. (4) Smoothness in running, due to the fact that the centre core is not rolled up in an annular method and then squeezed into shape, but is lapped layer upon layer from one continuous length to form the shape of the finished section. We hope when you are wanting Fan Belts you will be good enough to give us a trial as we feel sure that we can [Handwritten note on left margin: RM{William Robotham - Chief Engineer}/STD] [Handwritten signature on right side] WASHERS . HOSE . BELTS . SHEETING . I. R.{Sir Henry Royce} INSERTION . EBONITE . GLOVES . PACKINGS | ||