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 from Clear Hooters Ltd about a pair of wind tone horns sent for testing, detailing their operation and price.
| Identifier | ExFiles\Box 59\3\ Scan342 | |
| Date | 18th July 1935 | |
| 6066. On War Office; Admiralty and Air Ministry Lists TELEPHONE MIDLAND 3117 2 LINES TELEGRAMS—"CLEAR PHONE, BIRMINGHAM." CABLES—CLEAR, BIRMINGHAM. CODES—MARCONI, COMMERCIAL, BENTLEY'S CLEAR HOOTERS LTD ELECTRIC HOOTERS FOR ALL PURPOSES HOOTERLAND BIRMINGHAM. DIRECTORS— J.{Mr Johnson W.M.} H.{Arthur M. Hanbury - Head Complaints} MILLS. L. J.{Mr Johnson W.M.} F.{Mr Friese} AUSTIN, A.C.A. HEAD OFFICE & WORKS HOOTERLAND; 79-81. LOMBARD STREET, BIRMINGHAM. TRADE MARK. Manufacturers and Patentees of THE "CLARION" (High Frequency) ELECTRIC HORN. The "CLEAR HOOTER," "Q" ELECTRIC HORNS, "OWL" PUSH BUTTONS, etc. Your Reference Experimental Dept. JHM/WJ. Our Reference Messrs Rolls-Royce Ltd., WST Nightingale Road, D E R B Y. 18th July, 1935. Dear Sirs, For the attention of Mr. West. The writer confirms his visit the other day when you expressed a desire to make a test on a pair of wind tone Clear-Hooters C.H.150 and in accordance with our promise we have much pleasure in posting you these today. We hope the tone of these instruments will please you and that we may have the pleasure of receiving your equipment business. It may interest you to know that the note of this wind tone horn is produced on musical principles by the air column in the trumpet vibrating in sympathy with the electrically operated diaphragm. By this means a pure pleasant tone of very efficient clearing power is obtained suitable both for town and country. The retail price of these is 30/- each, see list, which is subject to a wholesale discount of 25% and 20%. Continued . . . | ||