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).
Explaining the circuit connections for a battery ignition system.
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan63 | |
| Date | 7th May 1925 | |
| To R.{Sir Henry Royce} & E.{Mr Elliott - Chief Engineer} From EPC. c. CJ. & Ph. c. HY.{Tom Haldenby - Plant Engineer} Ds. c. Wor.{Arthur Wormald - General Works Manager} Eg. EFC4/T7.5.25. BATTERY IGNITION CIRCUIT CONNECTIONS. Below is a simplified diagram of an ignition circuit (including magneto ignition) There are three branches in parallel, for instance:- (1) Primary inductance branch I, in which a current is initiated by inserted or induced E.M.F. (2) Contact point branch P. (3) Condenser branch C. which, taken together in pairs, make three circuits, e.g. IP, PC and IC. Each of these three circuits in turn enters into the consideration of the operation of an ignition system. The current initiated in the IP circuit during the first stage of operation is like that of a low voltage alternating lighting current as regards its contact requirements. We say then that the IP circuit requires ordinarily Contd. | ||