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).
Responding to a query about the Clayton Dewandre patent for windscreen defrosters.
| Identifier | ExFiles\Box 147\2\ scan0223 | |
| Date | 7th February 1940 | |
| 1247 Ev.{Ivan Evernden - coachwork} from N.W. c. to Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/Mr. Edwards. NW{N. Walker - Patents}9/MW. 7.2.40. re: Windscreen Defrosters. ------------------ Referring to your Ev{Ivan Evernden - coachwork}4/26.1.40; we send herewith a copy of Clayton Dewandre 514,566. We are not familiar with the details of the arrangements you refer to as well known, but it is noteworthy that this patent covers only the case where the same motor drives two impellors, one for vehicle heating and the other for defrosting the screen N.W. | ||