Hand-drawn schematic for a pressure-based petrol level measuring device.
| Identifier | ExFiles\Box 75\2\ scan0112 | |
| Date | 28th January 1920 | |
| COPY X.3891 R1/4 28.1.20 ABOUT 4" GALLONS 16 14 12 10 8 6 4 PETROL TANK BY DELIVERING A SMALL QUANTITY OF AIR WITH A GENTLE STROKE OF THE PUMP THE U TUBE IS MADE TO INDICATE THE DIFFERENCE IN PRESSURE DUE TO THE DEPTH OF THE PETROL & THE COLUMN OF COLOURED WATER THUS RECORDS THE QUANTITY OF PETROL IN THE TANK COLOURED WATER PETROL LEVEL MEASURING DEVICE (upside down text at bottom) R.R. 235 A (100 T) (S.E. 846, 6-S-19) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2460. | ||
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).