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).
From PN to EFC regarding a faulty ammeter from Ferranti, Ltd. and seeking an opinion on their instruments.
| Identifier | ExFiles\Box 168\5\ img122 | |
| Date | 23th November 1927 | |
| X3 498 S/W. PN{Mr Northey}3/EH.23.11.27. To EFC. from PN.{Mr Northey} Messrs. Ferranti, Ltd. have been in touch with you recently in connection with their new design of ammeter and volt meters for instrument boards. They inform me that some time ago they prepared an instrument for you reading 20-0-20 amperes, and that owing to some temporary fault which was quickly corrected the instrument was found to read 15% low. Did the matter stop at this point, or have you been able to form any opinion as to the merits or otherwise of the instrument now made by this Company ? [Illegible stamp] | ||