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).
Fitting information for the Sheffield Simplex Automatic Dipper.
| Identifier | ExFiles\Box 61a\1\ scan0252 | |
| Date | 13th October 1926 guessed | |
| THE SHEFFIELD SIMPLEX COMPANY. SHEFFIELD SIMPLEX AUTOMATIC DIPPER. FITTING INFORMATION. The CYLINDER is preferably set vertically, but can be set horizontally or at an angle if necessary. The piston rod may be lengthened with an extension piece and collar, supplied when required. The piston rod cannot be forced, and attempting to do so will damage the cylinder. By coupling one of the cylinder connections to the induction pipe with the engine running, the piston rod will move outwards or inwards accordingly. Alternatively, a cycle pump may be used for moving the rod. Pressure over 20-lbs. must not be employed. The Cylinder caps should never be taken off; if removed we cannot accept further responsibility. In ordinary cases the frame member has to be drilled 3/8" for the Cylinder pivot bolt; but for certain cars, such as the Rolls-Royce, special fittings avoid any drilling of the frame. The LEVER should be set about 90° in relation to the piston rod, and is preferably fitted through the lamp socket and one of its clips. Where an independent clip has to be used it must be pinned to the shaft. Levers are supplied either straight or offset, and their effective length can be varied by means of collars. The CONTROL VALVE may be fitted through the instrument board or fixed under or at the side of the scuttle. It is important that the Valve be placed within comfortable reach of the driver. The CONNECTING TUBES can be coupled from existing Autovac or screen-wiper connections; or from a union screwed into the induction pipe. Connection is made through a tap, by which the Dipper may be shut off. 1/4" copper tubing should be used, coupled to the Cylinder and Valve by rubber connections. Rubber connections should be kept as short as possible, especially between the engine induction and Valve, and must not be used where exposed to any heat or oil. It is important that all tubing and connections be thoroughly cleaned out after having been made. HEADS to take the Cross shaft are of two types, the 'Short Head' and 'Long Head'. The latter is used where the shaft has to be set forward to clear the radiator, or to leave space behind for the Cylinder. Seating washers are supplied for fitting existing bracket and lamp seatings. | ||