| Year | 1939 |
| Date | 09-Feb |
| Volume | 80 |
| Issue | 1,970 |
| Page | 154 |
| Category | Electrical |
| Part | |
| Title | Coil Winding Machines |
| Author | J.Gordon Hall |
| Notes | Special uses of these aids to the electrical worker. Simple machine for "pile" winding, elevation and plan, constructing the check-drum |