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).
Proposed arrangements for electrical wiring, ignition, and charging switches.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan081 | |
| Date | 21th September 1928 | |
| To R.{Sir Henry Royce} From EFC. c. RU. E.{Mr Elliott - Chief Engineer} c. Ev.{Ivan Evernden - coachwork} Nor. EAC.10 ELECTRICAL WIRING. X7740 x8730 I have carefully read your R2/M19.8.28. We can see the advantages of the proposed arrangement but we wonder if you have overlooked a possibility which you previously favoured (R2/S.6.27), e.g. the utilisation of a field-breaking switch only as the additional switch to cut off, in this case, the charge. It has, we think, been satisfactorily shown that where charge is switched off by breaking the field of the otherwise present standard chassis system, little burning of switch or cutout contacts takes place (ref. our EFC4/T16.5.28. case 3.) May we put forward a claim for consideration in place of an entirely separate charging switch, together with present switch arranged purely as an ignition switch - the present switch remaining as at present with the sole exception that C is deleted from the lettering on the front. The switch would still act as a charging switch and automatically switch off the dynamo when the ignition was switched off, even though the charging switch proper (field switch) were left on. When running on a battery ignition only, the charge would automatically be off, but as both the separate M and B positions are considered more as test positions, this perhaps may be considered an advantage, as we should then be testing the battery ignition at a lower supply voltage (no charge). Contd. | ||