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).
Photograph of an Integrating Accelerometer with its associated components.
| Identifier | ExFiles\Box 138\2\ scan0191 | |
| Date | 1st April 1938 guessed | |
| On main unit: INTEGRATING ACCELEROMETER TYPE TF{T. Fisher}84A No.279 MARCONI-EKCO INSTRUMENTS LTD LONDON MAINS OFF CHECK AC VOLTS SET ZERO A.C. VOLTS BALANCE START LOW HIGH RANGE FIELD CURRENT FIELD CURRENT VIBRATOR On right unit: VIBRATOR FILAMENT AND MARCONI-EKCO INSTRUMENTS LTD LONDON | ||