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 test a siren for the radiator steam escape pipe as a boiling water alarm.
| Identifier | ExFiles\Box 77\4\ scan0319 | |
| Date | 1st March 1923 | |
| [strikethrough]c. to Hs.{Lord Ernest Hives - Chair}[/strikethrough] X4240 BY/Shn1/DB.{Donald Bastow - Suspensions}1.3.23. X.4240 - RADIATOR - BOILING WATER ALARM. Will you please try out a siren for the radiator steam escape pipe, on the lines of the attached print of Scheme 478. We suggest the parts should not be sweated up until you have obtained by trial the best arrangement of the sound diaphragms. BY/Shn. | ||