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).
Development of sequence starter schemes 2A and 2B, including modifications to helical and parallel teeth.
| Identifier | ExFiles\Box 64\4\ scan0060 | |
| Date | 20th December 1927 | |
| X7655B To R.{Sir Henry Royce} from EFC c. BJ. E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} Ev.{Ivan Evernden - coachwork} c. Wor.{Arthur Wormald - General Works Manager} EFC6/T20.12.27. SEQUENCE STARTER 2A and 2B SCHEMES. X7655A 2A scheme as arranged in the first instance on 14-EX had 5° helical teeth with rounded ends; some remarks were made on this in our EFC4/T26.11.27. Secondly, and as on the car now sent to you, this arrangement was removed and replaced with corrected parallel teeth with rounded ends, and this is the arrangement referred to in our EFC1/T8.12.27. and as now sent to you on 14-EX. Further modifications of this 2A scheme have been put in abeyance until we receive your comments. Concerning the 2B scheme, we are, as reported in our EFC10/T12.12.27, proceeding to instruct for the 2B1 scheme to. Lec.2441/2 to be put on 9-EX, in this instance using the 5° helical teeth with sharp corners. The 2B2 scheme to Lec.2496 is being proceeded with. We are attaching for your convenience a blueprint of the diagram of the sequence starter arrangement on 14-EX. There is one slight fault with this diagram viz. that it shews the contacts operated by the motion of the armature to make contact sooner than they do. EFC. | ||