| Year | 1920 |
| Date | 11-Nov |
| Volume | 43 |
| Issue | 1,020 |
| Page | 393 |
| Category | Workshop |
| Part | 5 |
| Title | Small Power Machine Shop Calculations |
| Author | Hubert Bentley |
| Notes | Shaping and Slotting Machines. Cone & gearing on double-geared traversing head shaping machine, six-speed gearbox, shaping machines, slotted link drive, the quick return motion, the Whitworth quick return motion, drive for pillar type shaping machine |