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).
Letter requesting samples of various insulating materials for testing.
| Identifier | ExFiles\Box 39\3\ Scan017 | |
| Date | 14th November 1919 | |
| X3073 8, Wolseley Road, Crouch End, London, N.8. 14th November, 1919. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, X.1109 - Wd.{Mr Wood/Mr Whitehead} 17/NW{N. Walker - Patents}30719. X.2495. X.3513. Referring yours 30th July, X.2505 insulating materials, as my Principals, the Swiss Insulating Works, Ltd., are again making deliveries to this country, I shall have pleasure in requesting them to send you, addressed for the attention of Mr. Whitehead - such suitable samples for testing as you desire of their:- Amber micanite sheets for Commutators, Standard size 1100 x 600 mm. To required gauges. Brown micanite sheets for mouldings, or hard stampings. Usual size 1000 x 1000 x 0.1 mm., and up. Micafolium in sheets, 2500 x 1300 x 0.15, 0.2 & 0.25mm. do. Rolls 1000 mm. wide. Thick 0.15, 0.2 & 0.25 mm. Bakelite sheets, Plain or varnished 1000 x 500 x 1-30 mm. do papers. To various thicknesses. do. Tubes, in all sizes. Pergamite, as required. Varnished cloths, yellow or black. To voltage test & gauge. do. Tapes. To thicknesses and width. do. Silks, yellow. Usual thicknesses 0.10 & 0.125 mm. do. Papers, var. one or both sides, various gauges. As the above are made in several gauges, please send details of samples you require. Meantime, I enclose two booklets of samples showing above. (M)PIM(684 H'S) (1,000) VII.19 M&S | ||