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).
Visit to the Watford Magneto Company regarding the insulation material 'Beldalite' and its moulding process.
| Identifier | ExFiles\Box 39\3\ Scan027 | |
| Date | 15th March 1921 | |
| X.3513 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to EN c. to L. c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} c. to Wd.{Mr Wood/Mr Whitehead} Hsl/LG15.3.21. X.1109 X.800 X.4287 X.2494 INSULATION MATERIALS. X.3513 X.2505. On our way back to Derby yesterday, Mr. Day and I called at the Watford Magneto Company to see how they were progressing with their improved Magneto and to see if we could get any information from them as regards insulation materials. The Watford high tension distributor is made of material known as "Beldalite". It is made from a composition supplied from the Beldam Tyre and Rubber Company. They informed us that it had the same properties as stabalite and that there were several makers of similar material. We obtained from them samples of the crude material as they buy it. The plant necessary for moulding is extremely simple. All they have is an hydraulic press, steam-heated oven and the dies. The moulding is an unskilled job - they first warm the material so that it is easy to handle - they then put the composition into the dies and put it under a hydraulic press with about 20 tons pressure. The die is then screwed up tightly and put into an oven which is heated with steam at 50 lbs. pressure. After baking for 35 minutes they take it out and remove the moulded material. It then has a further baking at the same temperature for 7 to 8 hours. The reason Contd. | ||