| Year | 1939 |
| Date | 23-Mar |
| Volume | 80 |
| Issue | 1,976 |
| Page | 334 |
| Category | Electrical |
| Part | |
| Title | Coil Winding Machines |
| Author | J.Gordon Hall |
| Notes | Two hand-driven machines adapted from workshop tools. Geared hand winding machine, oscillating type of rev. counter, plan and elevation of geared hand-winding machine, winding stiff wire, direct driven hand-winding machine |