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).
Instruction sheet detailing the design and electrical properties of a Delco coil, including a wiring diagram.
| Identifier | ExFiles\Box 54\4\ Scan062 | |
| Date | 2nd November 1925 | |
| RR 238 (150 BKS.) [SH57. 20-8-20.] MP 224559 X.4654 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.C. Order No. WB {Mr Brazier / Mr Bell} 57 Customer's No. X4284. November 2ND 1925 Delco coil. NO2178. X4654 This coil is unconventional to usual practice in the respect that it has a nearly closed iron core circuit. The windings which are arranged electrically as diagram below, are enclosed in a black moulded case. [WIRING DIAGRAM] Labels: + (Positive terminal) P (Primary winding) - (Negative terminal) S (Secondary winding) H.T. (High Tension) Winding. Diagram. The resistance, impedance (50~) and inductances of the windings is as follows:- Signed Contd. This Sheet must be filed on completion of the work. | ||