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).
Instructions on remedying irregular wire spacing and stress on a coil.
| Identifier | ExFiles\Box 69\1\ scan0220 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (3) To____________________ 19__ Order No. WD{Mr Wood/Mr Whitehead}71 (contd) Customer's No. __________ b) Irregular spacing of the secondary wire on some of the layers causing mechanical stress locally on the insulation which might cause cracks to develop upon subsequent heating and cooling of the coil. These troubles as reiterated before can be remedied by providing a stiff paper spool over the primary as a foundation for the secondary and by possibly renewing certain parts or taking up wear in the traverse mechanism of the winding machine. Signed H West. This Sheet must be filed on completion of the work. | ||