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).
Design modifications to the Spectre-Marles type steering column with the Adamant Engineering Co.
| Identifier | ExFiles\Box 95\1\ scan0159 | |
| Date | 12th December 1934 | |
| 350 To BY.{R.W. Bailey - Chief Engineer} from Da.{Bernard Day - Chassis Design} Da.{Bernard Day - Chassis Design}1/HP.12.12.34. c.c. Hs.{Lord Ernest Hives - Chair} Hdy.{William Hardy} RHC{R. H. Coverley - Production Engineer} Rm{William Robotham - Chief Engineer} SpectreCodename for Phantom III - Marles type Steering Column. We have discussed our design of double roller Marles type steering with Commander Maltravers of the Adamant Engineering Co, makers of the Marles gear. He has approved of the scheme in the main, but has made one or two suggestions which as they result in facilitating manufacture and reducing cost of weight, we have embodied in a new drawing, N. Sch.4291, which we attach. The principal alteration is the reduction in the extreme outside diameter of the worm, thereby reducing the casing to correspond. The overlength has also been reduced, these two modifications being in accordance with both Marles and Gemmer practice. The worm roller bearings have also been modified so as to use standard Adamant Engineering Co. outside race and roller cage. This, in addition to making use of existing parts, also enables Adamant to use their standard gauging apparatus in the manufacture of the worm, which will greatly help them and speed it up. We have also provided a little more range of adjustment for assembling, and have arranged to prevent the inner races of the roller bearings from rotating, also in accordance with their practice. None of the features which we are especially aiming at in the design have been sacrificed at all by these modifications, and we should like N. Sch.4291 to supersede N. Sch.4276. Commander Maltravers suggests that they should make the worm and roller of the experimental gear at any rate, and should in addition have prints of all the details, so that they can give us the benefit of their experiences on each one. The worm thread has straight sides, and the roller must have curved sided teeth to correspond. Da{Bernard Day - Chassis Design} | ||