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).
Suitability of Warnington and Vibrophone horns.
| Identifier | ExFiles\Box 59\3\ Scan012 | |
| Date | 20th May 1913 | |
| R.R. 646 (100 H) (PP. 883. 17-4-13) E.P 3986. X1069. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 476 (FOUR LINES). DEPARTMENTAL MEMO. Re Warnington Horn. - X.334 Hy{Tom Haldenby - Plant Engineer} 20/5/13 Will you please inform us if it is your intention to keep the Warnington and Vibrophone horns which we obtained on approval some little time ago. Otherwise the Order Office wish to return them immediately to the makers. p. Wor.{Arthur Wormald - General Works Manager} TSM (signature) Wor.{Arthur Wormald - General Works Manager} 21 May '13. I do not think these horns are worth keeping and spending time on unless they have been specially obtained because someone requires information concerning them. The Vibrophone horn is a horn with a vibrating diaphragm similar to the Klaxon but not so powerful. It is driven by a flexible shaft from a friction pulley which is brought into contact with the flywheel by a small thumb lever and Bowden wire. The flexible shaft and its fixings are very poor and sure to give trouble unless fitted within a straight line so that the shaft does not bend much. The Warnington horn is a similar horn but is better made and is operated by hand by pushing down a knob on the horn itself. This revolves through bearings, a disc containing rollers. The rollers bear on a steel bell which comes in contact with the diaphragm. Hy{Tom Haldenby - Plant Engineer} This sheet must be filed with the correspondence to which it refers. | ||