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).
Trial of an A.T. Speedometer Head with Trip attachment using Cobalt Magnets.
| Identifier | ExFiles\Box 50\4\ Scan060 | |
| Date | 19th June 1924 | |
| -DY {F R Danby} - from ROY. {Sir Henry Royce} c. to Hs. {Lord Ernest Hives - Chair} X 4308 ROY {Sir Henry Royce} 6/AIG19.6.24 A.T.Speedometer Head with Trip attachment In submitting this instrument for trial, the Makers advise they have used Cobalt Magnet in same in lieu of our present standard, and I asked them for more definite information as to what these Cobalt Magnets were, and if they had any definite data shewing how they compared with the present standard Magnets. They have replied as copy attached. ROY. {Sir Henry Royce} ENCLOSURE. copy of letter from the A.T.Speedometer Co. dated 18.6.24 ENCLOSURE Nº 507 JUSTSO | ||