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 showing modifications to a Crosby hydraulic indicator.
| Identifier | ExFiles\Box 52\1\ Scan006 | |
| Date | 8th May 1928 | |
| CROSBY INDICATOR MODIFICATIONS TO HYDRAULIC INDICATOR 1) 1 off BRASS Dimensions: 1.400-8, 1.200-0, 1.100, .950, .748-1, .500+1/2, .660, .275, .750, .943, 1.062 2) 1 off M.S. 3 GROOVES .025 WIDE AND DEEP .125 LAP TO BORE SLOT .100 WIDE TAP 2.BA Dimensions: .175, .075, .325+2, .400+2, .687, 1.00", .350, .500 3) 1 off M.S. SCREW AS PER MODEL FOR UNION TYPE END SEE E27436 Dimensions: 1.375, 1.250, .600, .550+2.5, .300+2.5, .850+1, 1.110, .250, .750, 1.000+15, 1.110, 1.225", 1.800 4) 1 off M.S. SCREW 2 B.A. OTHERWISE AS PER MODEL FOR INTERNAL THREAD SEE ATTACHED MODEL 5) 1 off DURAL SCREW 2.BA. OTHERWISE AS PER MODEL ONLY NO HEXAGON. SAW CUT FOR SCREW-DRIVER SCALE 2/1 | ||