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).
Advertisement for Clear Hooters high-frequency electric horns, models H.F. 500 and H.F. 180.
| Identifier | ExFiles\Box 166\9\ img158 | |
| Date | 28th February 1938 guessed | |
| INCISIVE NOT INCIVIL CLEAR HOOTERS TRADE MARK HIGH FREQUENCY ALL BRITISH ELECTRIC HORNS AND FULLY GUARANTEED SUPER HIGH FREQUENCY MEDALLION HORNS for Cars and Motor Cycles. Highly finished in Ebony Black and Chrome. Latest and most up-to-date models of guaranteed performance. MODEL H.F. 500 5-in. Medallion Weight 2 1/2-lb. 6 or 12 volts . . 20/- EACH (U.K) MODEL H.F. 180 4-in. Medallion Weight 1-lb. 14-oz. 6 or 12 volts . . 15/- EACH (U.K) Complete with Cable and Horn Push Straight brackets can be fitted to these Horns if specified. Dash bracket attachment . . 1/3 Each extra 24 Volt Horns . . . . . . 10/- Each extra Please state voltage when ordering and if for Car or Motor Cycle. The superior tone of these Clear Hooters is produced on the resonant Disc principle from an improved diaphragm of our own exclusive and patented design, giving better performance and note retaining qualities than instruments without this feature. Sole Manufacturers and Patentees— CLEAR-HOOTERS LTD., 79 & 81 LOMBARD STREET, BIRMINGHAM, 12. Telegrams :—' CLEAR, Birmingham.' Telephone—MIDland 3117 (2 lines) | ||