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).
The disadvantages of ferflex armouring for wiring and a comparison between Lucas and Glovers products.
| Identifier | ExFiles\Box 168b\2\ img023 | |
| Date | 13th December 1919 | |
| Contd. -2- Ckl/T13.12.19. that these wires should be drawn into tubes and bound together with tape or cord where they cannot be enclosed, as you suggested in your note. We discussed with them the several disadvantages of the ferflex armouring as follows:- One of these disadvantages is the way in which the armouring can be slipped back along the length of the cable unless properly secured in the vicinity of the attachment of the cable to terminals. Our method at present on the Lucas wiring is to use Lucas ferrules which are threaded over and sweated to the armouring, but this method does not always result in preventing the armouring from being drawn back. Mr. Beaver suggested that the simplest way perhaps to over- come this trouble would be to whip the end of the armouring with fine wire to secure it in position before placing over the ferrule and soldering in place. Another disadvantage of the ferflex armouring which we pointed out was that at any rate in the case of the Lucas armouring this seems to be blackened considerably after use. It would appear, however, that in the case of the ferflex armouring on the Glovers wires, that this would not take place so readily, and it is quite apparent that the Glovers ferflex armouring is of better quality than that of the Lucas. Mr. Beaver stated that this blackening would not take place so readily on the Glovers cables owing to the interposition of the braiding between the rubber insulation of the conductors and the ferflex Contd. | ||