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).
Protecting the ignition system by independently fusing electric petrol pumps.
| Identifier | ExFiles\Box 163\1\ img005 | |
| Date | 12th September 1933 | |
| x6007. E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to By.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}/Wst.2/MA.12.9.33. ELECTRIC PETROL PUMPS. PROTECTION OF IGNITION SYSTEM. We have adopted the principle on chassis relying solely on battery ignition, that where other accessories are connected on to the ignition supply they should be independently fused so that in the event of a electrical failure the ignition will not be put out of action. The electric petrol gauge is now protected independently of the ignition by a small fuse, in view of the failures we have previously had with this unit putting the ignition out of action. As the S.U. Electric petrol pumps will be fed from the same terminal as the ignition we ought also to have these independently fused so that in the event of one pump failing electrically the car could still carry on with one pump and the ignition OK. The simplest way to do this we consider is to get the S.U. Co., to incorporate a small cartridge fuse on the pump in a similar way to the method Messrs. Smith's adopted at our request on the petrol gauge. If the S.U.Co., cannot do this easily we could ourselves fit a small combined terminal and fuse unit as shewn. FEED FROM IGNITION [Diagram showing two pumps connected to a 'FUSE AND TERMINAL BOX' which is fed from the ignition] FUSE AND TERMINAL BOX PUMP PUMP Hs{Lord Ernest Hives - Chair}/Wst. | ||