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).
Blueprint for a Buckley self-adjusting tappet.
| Identifier | ExFiles\Box 158\5\ scan0056 | |
| Date | 30th January 1940 guessed | |
| BUCKLEY SELF-ADJUSTING TAPPET PROVISIONALLY PROTECTED TAPPET CLEARANCE 0.010" MAXIMUM OIL PRESSURE 150 Lbs/Sq. Inch. Certain dimensions here shown such as the diameter of the equalising orifice in the grub screw and the gauge of the springs are tentative and liable to modification as the result of tests. No S1 1/8" BSF 3/16 BSF 5/32 STEEL BALL DRILL No 46 No 30 DRILL This opening must subsequently be sealed. No 31 DRILL No 80 DRILL SPRINGS DIAMETER | GAUGE | LENGTH | TURNS PISTON SPRING | 0.50" | 18 | 0.75" | 7 SLEEVE do. | 0.60" | 24 | 1.50" | 10 VALVE do. | 0.15" | 30 | 0.50" | 5 A.B. BUCKLEY., F.C.G.I., M.Inst.C.E. 64 Victoria Street. S.W.1 & 9 Park Hill. Carshalton. | ||