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).
Parts list for fitting a combined dimmer switch and fixed resistance to a Wraith III chassis.
| Identifier | ExFiles\Box 167\1\ img176 | |
| Date | 26th August 1937 | |
| 6116. c. Fm/RC.{R. Childs} G/Br.{T. E. Bellringer - Repair Manager} Hy{Tom Haldenby - Plant Engineer}/CAN. BY/HK.{Col. T. Harker - Sales}3/B.26.8.37. WRAITH III. RR.Sch.1110 - Combined Dimmer Switch and Fixed Resistance for 3½ volt Bulbs. All Wraith chassis in hand are to be fitted with the above dimmer switch. To do this, will you please order sufficient sets of the following parts, prints of which are attached herewith. DW.379 - Cable Eye. 2 off. DW.381 - Distance Piece. 1 off. DW.382 - Support - Dimmer Resistance. 4 off. DW.383 - Spindle. 1 off. DW.384 - Contact Arm. 1 off. DW.385 - Bracket for Spindle. 1 off. DW.386 - Control Knob. 1 off. DW.387 - Former - Dimmer Resistance. 1 off. DW.388 - Support Plate - Instruments. 1 off. DW.389 - Case - Instruments. 1 off. DW.390 - Base - Dimmer Switch. 1 off. DW.391 - Assembly - Resistance - Dimmer. DW.393 - Insulation - Dimmer Switch Base. 1 off. RR.Sch.1110. Additional parts required :- 24 SWG. .022 dia."Dull-ray"Enamelled Resistance Wire. 11 Ft. 3" Dowler Eyelet. No.1400. 4 off. " " No.2270. 4 off. " " No.2361. 2 off. 1 m/m dia. Sistoflex Sleeving .750 long. 1 off. .040 dia. Copper Wire. .500 long. 1 off. -Contd- | ||