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).
Letter to Joseph Lucas Ltd. suggesting a new dual electro-magnetic horn design to save cost, weight, and space.
| Identifier | ExFiles\Box 59\3\ Scan179 | |
| Date | 24th June 1932 | |
| X6032 Hs{Lord Ernest Hives - Chair}/Wst.2/AD. June 24th, 1932. Dr. Turner, Messrs. Joseph Lucas Ltd. Great King St.{Capt. P. R. Strong} Birmingham. Dear Sir, Electric Horns. With reference to our Hs{Lord Ernest Hives - Chair}/Wst.1/MA of the 20th inst. referring to the mounting of two high frequency horns in parallel slightly de-tuned, our Sales Dept. have expressed interest in the scheme but have criticised the fitting of two horns. I offer the suggestion that the idea could be incorporated in one horn. This horn would have a dual electro-magnetic system complete with diaphragms. The idea seems to possess the advantage of reduced overall cost, weight and space on the chassis. We put this suggestion up to you and if you think it is worth while, you might like to proceed with the idea experimentally. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||