| Year | 1931 |
| Date | 29-Jan |
| Volume | 64 |
| Issue | 1,551 |
| Page | 111 |
| Category | Electrical |
| Part | |
| Title | Rotary Converters. Converting Alternating to Direct Current |
| Author | A.H.Avery |
| Notes | Sinusoidal alternating current, rectified "impulse" current, rectifying commutator, self-exciting rotary converter |