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).
Graph comparing the deflection versus temperature for a Bi-Metal Thermostat and another thermostat type.
| Identifier | ExFiles\Box 39\4\ Scan301 | |
| Date | 10th December 1932 | |
| BI - METAL THERMOSTAT 10-12-32 11 PLATES LOWEST PLATE, STEEL FACE DOWNWARDS REMAINDER ARRANGED SO THAT LIKE METALS WERE IN CONTACT DEFLECTION - INS THERMOSTAT 1032" D/A SEPT 9TH/32 BI-METAL TEMPERATURE °C | ||