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).
Short note from Klaxon Ltd to Mr. Clarke with a waveform analysis of a horn supplied to RR.
| Identifier | ExFiles\Box 59\3\ Scan110 | |
| Date | 11th February 1931 | |
| X. 6074. Telegrams: "KLAXONET, LONDON." "EDIKLAXOS, PHONE, BIRMINGHAM" Telephones: LONDON-MAYFAIR 4850-1. BIRMINGHAM-A.GREEN 951. YOUR REF: OUR REF: KLAXON LIMITED Makers of WARNING SIGNALS Works Department: WARWICK ROAD, GREET, (NR TYSELEY STATION, G.W.R.) BIRMINGHAM. Registered Office: 36, BLANDFORD STREET, LONDON, W.1. FOR SALES, SERVICE AND FINANCIAL MATTERS. Directors: J.F.MONNOT(U.S.A), C.R.GENTRY, A.H.JOHNSON. Secretary: L.D.PEARCE. 11. 2. 31. Mr Clarke This may interest you FTC [Text on attached slip] A-1 as supplied to RR Fundamental about 360 per sec upper harmonics 6 x 360 " " | ||