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).
Description of views 8 to 11, detailing the components and assembly of a switch unit and non-inductive resistance.
| Identifier | WestWitteringFiles\L\April1924-June1924\ Scan55 | |
| Date | 15th May 1924 guessed | |
| (4) View No.8. Gives an independent plan of the magnet frames which are interchangeable as pressings. View No.9. Shews the rear face of the switchbase with conductors in position. It is intended to fix all the conductors on as shewn when assembling and then bolt the complete unit to the dashboard of the car together with a conduit for carrying the conductors away. A sheet of bakelite is provided between the actual switchbase and the dashboard so that should any of the connections become loose there will be no danger of shorting to the dash. View No.10. Gives a plan of the unit with the cover removed. It shews the 2 ends of the main switch magnet winding, one making contact with the auxiliary magnet frame and the other joined to the neighbouring terminal post. It also shews the connections of the non inductive resistance in parallel with the first mentioned coil. The ribbon windingconnection is seen in plan and finally one end of the hold-on winding is shewn joined to the top of one of the bolts which secures the unit to the dashboard thus earthing this winding at one end. View No.11. Gives a section through the main terminal posts and shews an end view of the clamping plate for the main switch bottom carbon.break. This drawing also shews a stripped section from the bridge on the auxiliary magnetic switch to a terminal post. The flag connections and U shaped clamping plates on the terminal posts are interchangeable. The non inductive resistance has already been discussed by Mr. Royce in a former note and its quantities fixed. We have not investigated the dimensions of the bobbin required for this resistance but have shewn one which we think should be large enough. The bobbin can be easily removed by unscrewing the post on which it is mounted. For the purpose of testing the complete apparatus Mr Royce thinks you should make a metal base with a tempor- | ||