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).
Cross-sectional diagram of a Claudel-Hobson petrol pump regulating valve.
| Identifier | ExFiles\Box 61\3\ scan0253 | |
| Date | 15th September 1931 | |
| Air Unions. Needle valve. Cast Alum. Body. Brass cups. Impregnated fabric diaphragm. Petrol connection. SCALE 1/1. CLAUDEL-HOBSON. PETROL PUMP REGULATING VALVE. WEIGHT 1.0 lb. ROLLS-ROYCE LIMITED PRINT ROOM, 15 SEP 31 DERBY. H/A 11-9-31. | ||