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).
New mouldable insulating material found in Bosch products and recommending it be tested.
| Identifier | ExFiles\Box 61\1\ scan0205 | |
| Date | 23th March 1932 | |
| WST X6110 R: from E.{Mr Elliott - Chief Engineer} C: Mr. Her. Hs.{Lord Ernest Hives - Chair} Fg: Byn E.1/HP.23.3.32. re Moulded Insulation. On all recent Bosch products I have noticed an insulating material is used which possesses all the characteristics of a rubber base compound, and yet allows of finished mouldings being produced in the die. This is somewhat new to us as previously parts made from such compounds as Beldalite, and Stabilite have always had to be machined all over. These Bosch mouldings are machined in places where required, which the Bakelite gum moulding does not allow of, and it somewhat follows that the material should be free from tracking. As we have suffered in the past from tracking on synthetic gum mouldings used for high tension work, and there is always liability to this form of breakdown even if generous surface insulation is obtainable it is recommended that we obtain if possible some of the Bosch mouldable material, and test it. E.{Mr Elliott - Chief Engineer} | ||