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).
Design of a new dual-note electric horn, combining Bosch and Cobra horn notes.
| Identifier | ExFiles\Box 59\3\ Scan094 | |
| Date | 4th December 1930 | |
| CX{Major Len W. Cox - Advertising Manager}/HDY.{William Hardy} FROM DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} X. 6075. DA{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork}2/M4.12.30. C. to - SG.{Arthur F. Sidgreaves - MD} EFC. C. to - CX.{Major Len W. Cox - Advertising Manager} HS.{Lord Ernest Hives - Chair} re. HORNS. We thank you for CX{Major Len W. Cox - Advertising Manager}/HDY{William Hardy}12/CP11230., and are pleased to hear that you have sent the sample klaxon 2 note horn to EFC. We agree that the Cobra horn as fitted to P. 2. has a nice note. We wish to retain that note. We believe it is R's idea that we should persevere with the design of an electric horn, the top note of which shall be that of the high note Bosch, and the low note shall be that of our present Cobra horn. If we could achieve this it is our recommendation that we should fit such a horn to both our chassis, having a double switch on the column, light pressure for deep note and heavy pressure for high note. This we consider an interesting feature in that it would cut down the price of our accessories in the case of both cars by the total price of the wind horn. We shall be interested to hear what EFC. is able to achieve in this direction. DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} [STAMP] RECEIVED 9 DEC 1930 | ||