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 detailing the effect of connecting the earth end of a Remy 6V 12 cylinder coil's secondary to different primary terminals.
| Identifier | ExFiles\Box 52\3\ Scan338 | |
| Date | 22th October 1919 | |
| R.R. 258 (24 B) (M. {Mr Moon / Mr Moore} 150. 16.3.10) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 705. X. 2814 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No. Customer's No. Effect of connecting earth end of secondary of Remy 6V 12 cyl coil to different Primary Terminals 22/10/19 191 Diagram shows coil with H.T. Terminal, Earth Terminal, and on the other end terminals for Batt, Timer, and Ballast. The "ground" Terminal of coil was connected in turn (1) to earth (2) to "Batt" Terminal & (3) to "Timer" Terminal. The result confirmed those obtained 17/10/19 (page 3) in that there was no discernable difference between the three ways of "grounding" the secondary, the sparking only being affected by the direction of current in primary. Signed R.A. Jamie H. {Arthur M. Hanbury - Head Complaints} This Sheet must be filed on completion of the work. | ||