| Year | 1933 |
| Date | 26-Oct |
| Volume | 69 |
| Issue | 1,694 |
| Page | 395 |
| Category | Electrical |
| Part | |
| Title | A Model Electric Traction Control Equipment |
| Author | "Circuit Breaker" |
| Notes | Schematic diagram of power wiring, of control circuit, switch group, resistance bank and equipment, contactor with "in" and "out" interlocks in the "closed" position |