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).
Approved alteration to the switch box, removing the need for a separate tumbler switch.
| Identifier | Morton\M3.2\ img008 | |
| Date | 17th January 1935 | |
| [Typed, crossed out:] DY{F R Danby} from E.{Mr Elliott - Chief Engineer} [Typed, circled:] Cy to HS.{Lord Ernest Hives - Chair} [Handwritten annotations, top:] [Mirrored text:] SWITCH BOX [Faint green stamp:] ORIGINAL [Top right:] to GT, JAC, AH Secret E.A.C. ------------- Switch Box. [Handwritten:] X.8731 ------------- E1/17.1.35. ------------- We have received a memo from Mr Royce approving of the proposed alteration to the switch box which will cancel the necessity for the tumbler switch on the back of the instrument board. It is contingent on PN{Mr Northey} agreeing that the charging switch can be left always on as suggested by HS.{Lord Ernest Hives - Chair} This memo will be circulated as soon as possible. The switch as altered would operate as follows . [Handwritten diagram:] - M & C - BM & C - B - O | ||