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).
Secondary coil winding machines observed during a visit to Messrs. North's, with suggestions for future development.
| Identifier | ExFiles\Box 69\1\ scan0256 | |
| Date | 4th November 1929 | |
| Wor.{Arthur Wormald - General Works Manager} from RFC. c. Hy.{Tom Haldenby - Plant Engineer} c. Ev.{Ivan Evernden - coachwork} c. Sft.{Mr Swift} X.8710. EFC/AM4.11.29. SECONDARY COIL WINDING MACHINES. During our visit to Messrs.North's recently, we were shewn the small and very neat secondary winding machines used for winding the secondaries of their magnetos and coils. We were given to understand that these were designed and made by themselves. They stated that they had full working drawings, and would be quite pleased to let us have a set of these drawings from which we could make a similar trial machine. Alternatively they made us the offer that they would wind some secondaries for us experimentally should we care to send some coils along. The traverse of these machines is operated by a worm drive working the traverse through a heart shaped cam out and back against a spring control. The result appeared to be very good and uniform. One particular feature appeared to be the correctness of the winding pitch to the wire diameter, another the ease with which the limits of traverse can be regulated by the use of a friction clutch and indicating dial. Yet another feature would be the small cost of renewal of parts. Messrs. North stated that they were obtaining wire of very uniform diameter and gave us the name of the makers. We have asked Roy.{Sir Henry Royce} to get us some ignition coil wire from the same source. We suggest that the matter of a smaller, simpler and more easily adjustable winding machine for ignition coil secondaries be looked into. EFC. | ||