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).
Request to produce a modified 20 HP chassis switchbox by superseding specific contact makers.
| Identifier | ExFiles\Box 56\4\ Scan132 | |
| Date | 7th December 1927 | |
| X5730 To. RHG C. EFC. BY/RD4/ML7.12.27. 20 H.P. CHASSIS SWITCHBOX - SEC:8160. Will you please put in hand one switchbox complete to L.O.P. D.50868 which is the standard 20 H.P. switchbox but having the contact makers D.50340 superseded with contact makers D.51622. To produce D.51622 the same sectional bar can be used as that used for D.50340 but the position of the square hole and chamfers are the special features, blueprint of D.51622 herewith. BY/RD. | ||