| Year | 1929 |
| Date | 17-Oct |
| Volume | 61 |
| Issue | 1,484 |
| Page | 371 |
| Category | Electrical |
| Part | |
| Title | A Simplified Method of Winding Sections for Spark Coils |
| Author | J.Pike |
| Notes | Tool for building up the sections, notes, building up the secondary, sketch showing secondary sections joined up |