| Year | 1957 |
| Date | 29-Aug |
| Volume | 117 |
| Issue | 2,936 |
| Page | 297 |
| Category | Lathe |
| Part | |
| Title | A Thread Dial for Cutting Metric Threads on a lathe with an English leadscrew |
| Author | K.G.Anderson |
| Notes | Index dials. Tail-stock ram, cross-slide stop, saddle stops, gear train, "Armstrong patent" handle |