| Year | 1932 |
| Date | 29-Sep |
| Volume | 67 |
| Issue | 1,638 |
| Page | 294 |
| Category | Electrical |
| Part | |
| Title | A Rotary Transformer for Wireless High Tension |
| Author | A.H.A. |
| Notes | Details of permanent field and armature with angle brass base, side elevation, end and side view of brush gear, construction of base |