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).
Drawing showing a cross-section of a radiator relief valve with handwritten annotations.
| Identifier | ExFiles\Box 156\2\ scan0232 | |
| Date | 25th May 1939 | |
| DRAWING NOT TO BE SCALED PART Nᵒ F.A.B./A/1. ALTERATIONS Valve Seat Bellows "A" Bellows Stop Bellows Top Plate Bellows Bottom Plate Relief Spring 1/8 15/16 SCALE FULL SIZE. RADIATOR RELIEF VALVE OFF PER SET DR N: GS APP: CH K: DATE: 25/5/39 WORKING LENGTH FACE AREA MACHINED DIMENSIONS MATERIAL MACHINED ALL OVER MACHINED GROUND SUPERSEDES SUPERSEDED BY PART No. F.A.B./A/1. THE BRITISH THERMOSTAT CO. LTD. TEDDINGTON WORKS, WINDMILL ROAD, SUNBURY-ON-THAMES, MIDDLESEX. D.{John DeLooze - Company Secretary} R.{Sir Henry Royce} LTD. | ||