Internal order request for a carbon plate rheostat from Cambridge Instrument Co. Ltd.
| Identifier | ExFiles\Box 167\2\ img081 | |
| Date | 30th October 1937 | |
| To EJJ. from RM {William Robotham - Chief Engineer} /RC. {R. Childs} 6103 Rm {William Robotham - Chief Engineer} /RC. {R. Childs} 6/MH. {M. Huckerby} 30.10.37. Will you please order for us from the Cambridge Instrument Co. Ltd.:- 1 Carbon plate rheostat to the following. 40 plates 3½" x 3½" x ⅛" with 5 connecting plates. This unit is for use on our starter motor and will have to carry up to 250 amperes. O.N. 816. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} | ||
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).