| Year | 1917 |
| Date | 14-Jun |
| Volume | 36 |
| Issue | 842 |
| Page | 369 |
| Category | Locomotive |
| Part | |
| Title | Locomotive Notes |
| Author | Chas. S.Lake |
| Notes | Duplex Locomotives - Southern Railway, U.S.A.. Machining Locomotive Valve Gear Details. Arrangement& Working of the Gear. Twin milling saws forming large fork end of valve rod. Drilling holes in large fork end radial drilling machine. Machining Operations. Plan showing Walschaerts gearing & piston valve, "Claughton" class 4-cylinder loco, London & Northe Western Railway. Valve rod as rough forging, after machining. Cylinders & steam chests |