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).
Alternative wiring diagram for Lucas type W.T. horns, proposing a method to use them without a relay unit.
| Identifier | ExFiles\Box 59\3\ Scan318 | |
| Date | 22th February 1935 | |
| Y6032. By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to Cx.{Major Len W. Cox - Advertising Manager} c. to Hn.{F. C. Honeyman - Retail orders} Hs{Lord Ernest Hives - Chair}/Wst.13/MA.22.2.35. ALTERNATIVE WIRING FOR LUCAS TYPE W.T. HORNS. It is possible to use the new Lucas "Wind Tone" horns for Sg{Arthur F. Sidgreaves - MD}'s and Mr.Geoffrey Smith's car without the relay units supplied by Messrs.Lucas. The steering column horn switch will be subjected to more duty but we are of the opinion that itwill stand the extra current. We illustrate the method proposed on wiring diagram below. In this new scheme the high tone horn is sounded alone for the town position and both horns full strength for country. We shouldlike Sg{Arthur F. Sidgreaves - MD}'s opinion of this arrangement when he has had an opportunity of trying them out. [WIRING DIAGRAM] HORN BUTTON TOWN COUNTRY TO POSITIVE SUPPLY ON DISTn BOARD. Cable dimensions indicated as fractions: 23/36, 90/36, 70/36, 90/36. CABLE DIMENSIONS INDICATED Hs{Lord Ernest Hives - Chair}/Wst. MM | ||