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).
Approval notification for a pressure control valve for fitment to H. M. Hobson carburettors.
| Identifier | ExFiles\Box 10\2\ 02-page20 | |
| Date | 15th November 1937 | |
| A.C.M./A.L. 15.11.37 Messrs. H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} Hobson (Aircraft & Motor) Components Ltd., We have to inform you that the pressure control valve as shown on drawing H.H.1287/1 is now approved for fitment to the above named Carburettors. We should be obliged therefore, if you would issue the necessary instructions to your works to this effect. | ||