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).
Inquiring if the 'stepped armature' feature on a Bosch starter motor is patented.
| Identifier | ExFiles\Box 62\1\ scan0113 | |
| Date | 13th January 1933 | |
| X6134 RECEIVED 14 JAN 1933 To BY/NW.{N. Walker - Patents} from E.{Mr Elliott - Chief Engineer} c. Hs{Lord Ernest Hives - Chair}/Wst. By/RD. E.3/HP.13.1.33. 1933 Stepped Armature Starter Motor. We are thinking of trying a parallel armature with a small step cut in it similar to that used on the Bosch starter motor, and we should be glad to know if you have any information as to whether this feature has been patented by the Bosch Co. E.{Mr Elliott - Chief Engineer} | ||