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).
Bench experiments conducted on plain coil battery ignition systems.
| Identifier | ExFiles\Box 52\3\ Scan343 | |
| Date | 14th November 1919 | |
| X. 2814 To R. {Sir Henry Royce} from EFC. {E. Fowler Clarke - Electrical Engineer} c. to W. c. to E. {Mr Elliott - Chief Engineer} c. to Bn. {W.O. Bentley / Mr Barrington} c. to EH. c. to Cy. c. to Da. {Bernard Day - Chassis Design} EFC {E. Fowler Clarke - Electrical Engineer} 1/T14.11.19. EXPERIMENTS ON PLAIN COIL IGNITION X 3127 X 2814 We have made a number of bench experiments on battery ignition which we record below:- 1. Effect of direction of high tension discharge. We have tried out various arrangements of connections in the primary circuit and of interconnection between the primary and the secondary, with the result that we have definitely proved that the only appreciable difference in the sparking characteristics of the coil is made by changing the direction of the high tension discharge. These results have been obtained both on an R.R. and a Remy 6 volt 12 cylinder coil, and are in agreement in the two cases. In any coil in which the direction of the secondary winding is fixed in relation to that of the primary, change of direction of secondary discharge can only be brought about by changing the direction of the primary current. In such a coil, as the R.R. standard, for instance, no appreciable difference is made by any change in the arrangement of connections in the primary circuit so long as the direction of the current through the primary winding remains the same. If, however, the direction of current in the primary winding be reversed, either by changing the Contd. | ||