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).
Trial for a silent zone switch, which transfers the horn's operation to the headlamps.
| Identifier | ExFiles\Box 168a\2\ img159 | |
| Date | 9th July 1935 | |
| 479 RHC.{R. H. Coverley - Production Engineer} From Ha/Wst. Ha/Wst.2/MA.9.7.35. SILENT ZONE SWITCH. We have received a sample relay switch which by means of a small changeover switch mounted on the instrument board can transfer the horn operation to the headlamps during the silent zone. Will you please have this scheme fitted to 18.G.IV for trial. We will arrange to supply T.T. with the wiring diagram. Ha/Wst. | ||