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).
Required sound penetration of single and two-tone Klaxon buzzer type horns for touring safety.
| Identifier | ExFiles\Box 59\3\ Scan099 | |
| Date | 11th December 1930 | |
| X6074. Sg.{Arthur F. Sidgreaves - MD} c. C. R.{Sir Henry Royce} c. Ey. De/Ev.{Ivan Evernden - coachwork} c. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} c. Cx{Major Len W. Cox - Advertising Manager}/Hdy.{William Hardy} PN{Mr Northey}5/PH11.12.30. X6074/5. X.1163A/b. (crossed out) SINGLE AND TWO-TONE KLAXON BUZZER TYPE HORN. Referring to EFC3/AD9.12.30. I feel that the considerations we have got to give in connection with out signalling devices rely more on whether the sleepy driver of a cart one half a mile ahead can be awakened when the wind is towards the car driver. It is quite useless to give a man a fast car when touring unless he is also supplied with a hooter capable of being heard at a very considerable distance ahead. The small sound or penetration value noticed with the buzzer on 26-EX would be quite useless for touring purposes and undoubtedly makes the running of the car in question not free from danger. PN.{Mr Northey} | ||