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).
On a two-rate charge switching scheme and special switchbox for one-way interconnection.
| Identifier | ExFiles\Box 163\6\ img097 | |
| Date | 2nd December 1930 | |
| X6016 To R.{Sir Henry Royce} from EFC. c. Sg.{Arthur F. Sidgreaves - MD} c. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} HY.{Tom Haldenby - Plant Engineer} PN.{Mr Northey} EFC1/AD 2.12.30. X.6016. TWO-RATE CHARGE SWITCHING SCHEME. SPECIAL SWITCHBOX FOR ONE-WAY INTERCONNECTION. Further to the first two paragraphs of our EFC2/AD9.12.30. in order to realise the one-way interconnection, the advantages of which were therein referred to, we put forward for your consideration the following arrangement of switchbox having three on positions on each side :- H S T & C M & C S T & 1/2C M B & C 1/2C M & B (& A) OFF OFF. The auxiliary magneto switch is still used with this switchbox. The first position on the right-hand side provides, as usual, both ignitions -- it also, as indicated by (& A) connects the dynamo armature to the battery. The other two positions on the right-hand side further connect the dynamo field directly and therefore provide for full charge in either position. So far we have assumed the left-hand switch to be off. If the left-hand switch is put in the first or second position while the right-hand switch is in the first position, half charge is given, but with the left-hand switch still in either of these two positions and the right-hand switch in either of its/two other positions full charge is then given. With the left-hand switch in the 3rd. position full dynamo output is given in every position of the right-hand switch. In this proposed arrangement the end of the half charge resistance electrically remote from the field winding is only taken to contacts on the left-hand switch | ||