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).
Instructions and description for a Sparton SCS De Luxe Bugle Type Horn.
| Identifier | ExFiles\Box 49\5\ Scan127 | |
| Date | 31th March 1929 | |
| RR 229 (150 BKS.) (DB{Donald Bastow - Suspensions} 451-8-12-24) MP 306975 X.4278 ROLLS-ROYCE LTD. INSTRUCTIONS. To: F.S.C. Order No.: A.D. 30 Customer's No.: x Sparton SCS De Luxe Bugle Type Horn. This horn is constructed with a long slightly expanding straight-sided trumpet projecting forward from the diaphragm. Overall length 16 1/2" Weight with clip 5 lb - 10 ozs. Finish black, fairly good American style. (There is a seam along the trumpet) The magnet is three-legged and laminated with the coil wound on the middle leg. The armature is laminated and controlled by very stiff springs. A domed cover held on by spring clips encloses the mechanism. The coil resistance is .84 ohm. This probably includes a non-inductive (contd) Signed This Sheet must be filed on completion of the work. | ||