| Year | 1939 |
| Date | 30-Mar |
| Volume | 80 |
| Issue | 1,977 |
| Page | 366 |
| Category | Electrical |
| Part | |
| Title | A Universal Charging Unit |
| Author | A.P.Webster |
| Notes | An apparatus applied to many uses. The unit at work, detailed description, theoretical wiring diagram, the complete unit |