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).
Rough sketch of an O.H.V. self-adjusting tappet.
| Identifier | ExFiles\Box 17\6\ Scan177 | |
| Date | 5th February 1934 guessed | |
| Rough Sketch of the O.H.V. Self Adjusting Tappet. Loose Cap "A". Slot "C" registering with "D" Frictional Point of Contact Self Adjusting Tappet "B" In fitting, turn from Right to Left until it jambs down Projections "D" Tappet Push Rod. | ||