| Year | 1913 |
| Date | 31-Jul |
| Volume | 29 |
| Issue | 640 |
| Page | 107 |
| Category | Steam |
| Part | |
| Title | Automatic Expansion Gear for Model Engines |
| Author | H.Muncaster |
| Notes | Arrangement of Whitehead patent gear, plan showing dash-pot arrangement, end view of casing showing ferrule & catch, middle & lowest position of trip lever (catches engaged & disengaged), cylindrical casing & cylinder bracket, details of catch lever, hardened steel die for catch lever, section of dash-pot plunger, sleeve & spring, ends of rod connecting governor to trip gear, details of left & right-hand trip levers (on page 110) |