| Year | 1945 |
| Date | 21-Jun |
| Volume | 92 |
| Issue | 2,302 |
| Page | 581 |
| Category | Internal Combustion |
| Part | |
| Title | Spiral Gears for Petrol Engines |
| Author | John Hellewell |
| Notes | The finished gears, L.H. spiral shown, both wheels R.H. spiral, set-up for crankshaft gear showing indexing wheel and plunger, for camshaft gear, seting cutter central over blank, for checking running and centre distance (photos by R.C.Hammond) |