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 Ferranti Ltd. concerning tests on dashboard ammeters for sticktion.
| Identifier | ExFiles\Box 168\5\ img139 | |
| Date | 22th August 1928 | |
| FERRANTI LTD ELECTRICAL & GENERAL ENGINEERS. HOLLINWOOD. LANCASHIRE. LONDON OFFICE, BUSH HOUSE W.C. 2. TELEGRAMS FERRANTI ESTRAND LONDON. TELEPHONES CITY 7618 CENTRAL 9325 TELEGRAMS: FERRANTI HOLLINWOOD TELEPHONE: Failsworth 181. (Private Branch Exchange) Messrs. Rolls-Royce Ltd, DERBY. Wednesday, 22nd August 1928. Your Ref EFC6/T. Our Ref Radio/G.R. Dear Sirs, For the attention of Mr. E.{Mr Elliott - Chief Engineer} Fowler Clark. - FERRANTI DASHBOARD AMMETERS - We have your letter of the 18th inst., and can only confirm that very careful tests we have taken several times over up to the present have failed to reveal any tendency to sticktion, but we are having the instrument retested in line with the Specification of Production Inspection & Test enclosed with your letter and will let you have a further report when this has been done. After this test has been carried out we propose to unseal the instrument and give it a very thorough further examination to see if there are any traces of foreign matter which may have got in the gap of the instrument and since fallen away; after this the instrument will be returned to you for retest and should you then not be satisfied with it our Mr. Baggs will be pleased to come over to Derby again and witness the tests for sticktion being carried out. Yours faithfully, FERRANTI LIMITED. | ||