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 from Joseph Sankey & Sons, Ltd. discussing the suitability of 'Stalloy' Armature Laminations and suggesting an alternative material.
| Identifier | ExFiles\Box 60\4\ Scan192 | |
| Date | 14th November 1933 | |
| WST 86099. E.{Mr Elliott - Chief Engineer} Telegrams - "SANKEY, BILSTON" Telephone No 41161 BILSTON Joseph Sankey & Sons, Ltd., BILSTON, STAFFS. TRADE MARK S BRANDS: LOHYS SPECIAL LOHYS MEDIUM RESISTANCE STALLOY INSULINE REFERENCE B DEPT. 179. EWR. REPRESENTATIVE: ROBERT JENKINS. ULSTER CHAMBERS, 168, REGENT STREET, LONDON, W.1. November 14th. 1933. Messrs. Rolls-Royce Ld. Nightingale Road. D E R B Y. WST Dear Sirs, With reference to the writer's visit to your works yesterday, and his interview with your Mr. H.{Arthur M. Hanbury - Head Complaints} E.{Mr Elliott - Chief Engineer} West, we were pleased to hear that the "Stalloy" Armature Laminations we supplied you with gave very good electrical results, but that they were not quite accurate enough to suit you. The writer pointed out that this could be overcome by making combination tools. With regard to using "Stalloy" to run 5,000 revolutions per minute, we are rather afraid that it is asking too much for a material of such a brittle nature, as there is a likelihood of the teeth breaking off; also your method of hammering the cores in is liable to crack the teeth, and we suggested you used our No. 41. quality, which in .014" thickness would give even better results than in "Stalloy" .028", and would certainly be very much safer to use, from a mechanical point of view. ALL STEEL SUPPLIED BY US IS OF BRITISH MANUFACTURE THROUGHOUT. | ||