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).
The supply and design of sleeveless magnetos and clocks from Messrs Norths.
| Identifier | ExFiles\Box 65\3\ scan0009 | |
| Date | 22th February 1927 | |
| R.{Sir Henry Royce} C. EFC. BY4/H.{Arthur M. Hanbury - Head Complaints} 22.2.27. 2 RECEIVED SEP 23 1927 x7791 SLEEVELESS MAGNETOS. CLOCKS. X7791 X85-30 X5790 In reply to R1/M.9.2.27. where you ask me to ascertain what is the earliest delivery of the modified machine of this type that we could get from Messrs Norths, we have taken the matter up with Mr.North himself personally, and he promises us that there will be a sample ready for testing, suitable for fitting on the 40/50, on March 2nd. In regard to the 20 HP. chassis, this presents more difficulty and Messrs Norths would like to know whether we are agreeable to their employing the horse-shoe type of magnet in place of the present straight type. They would of course make them as short as possible, but they would like to have some information on this at an early date. I attach hereto a rough sketch which Mr.North handed over, showing the approximate performance of the sleeveless magneto he is supplying. He has of course already had one running, and the diagram is based upon this, and certain modifications which have been made to same to produce the new one. X8530 In regard to the clock, Messrs Norths are fitting up two clocks, one having the winding operating from the back, the other having the winding operating from the front, the winding apparatus being accomodated by the bezel at the bottom of the clock, departing from the normal circular shape by running over the glass somewhat to form a boss through which the winding apparatus is fitted. We thought it desirable to have one of each clock fitted up, and same will be sent along for your inspection. The reason for having the winding apparatus on the front is that in trying to wind from the back it certainly did appear to be somewhat more difficult. With the winding from the front it is necessary for us to fit a plain glass instead of a bevel, as obviously it is difficult to get the bevel carried round the special shape at the bottom of the bezel. Mr.North fits his clocks with a clamping arrangement by which four legs are produced with a rubber pad on each to abutt against the instrument board, the clock being held in by means of a screwed ring. BY.{R.W. Bailey - Chief Engineer} | ||