| Year | 2005 |
| Date | 13-May |
| Volume | 194 |
| Issue | 4,247 |
| Page | 560 |
| Category | Electrical |
| Part | 7 |
| Title | Electro-Pneumatic Contactors |
| Author | Colin Beckwith |
| Notes | Jigs, arc control. Arc, blow out coil, simple electromagnetic forces, main contact tips, limits of wear, arc horns, main terminals |