| Year | 1922 |
| Date | 02-Feb |
| Volume | 46 |
| Issue | 1,084 |
| Page | 109 |
| Category | Horology |
| Part | |
| Title | Converting a Drum Clock Movement to Electric Drive |
| Author | James W.Bulman |
| Notes | The wheelwork, additions for driving wheelwork, the pendulum and its fittings, the contact board, the electro-magnet |