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).
Request to obtain six replacement stainless steel balls for a badly pitted H.T. Voltmeter.
| Identifier | ExFiles\Box 167\2\ img275 | |
| Date | 5th April 1940 | |
| EJJ Rm{William Robotham - Chief Engineer}/RC{R. Childs}/GJ Lab. apparatus. 6103 Rm{William Robotham - Chief Engineer}/RC{R. Childs}/CK{Mr Clark} 5.4.40 Re H.T. Voltmeter. The balls used for the calibrated spark gap on the H.T. Voltmeter have become badly pitted. Will you please obtain for replacement purposes six stainless steel balls each 25/32 inch in diameter (.781), from the Hoffman Manufacturing Co. Ltd. Rm{William Robotham - Chief Engineer}/RC{R. Childs} Received 19/4/40 | ||