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).
Clayton Heaters, suggesting they should be made to switch off with the ignition.
| Identifier | ExFiles\Box 137\1\ scan0324 | |
| Date | 13th December 1937 | |
| To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} c. Da.{Bernard Day - Chassis Design} c. By/RD. 1158 Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}1/MH.{M. Huckerby}13.12.37. CAR HEATERS. The new Clayton Heaters are so unostentatious in action that they have several times been left running inadvertently. They should be made to switch off with the ignition. There is never any use in running them without the engine as the matrix cools off almost immediately when the circulation from the pump ceases, if the fan is running. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||