| Year | 2005 |
| Date | 18-Mar |
| Volume | 194 |
| Issue | 4,243 |
| Page | 318 |
| Category | Electrical |
| Part | 5 |
| Title | Electro-Pneumatic Contactors |
| Author | Colin Beckwith |
| Notes | Further details of the construction starting with the piston rod. Piston seals, piston, piston rod, cylinder cover, notes on gaskets, main insulation - support bars, moving contact components, knuckling feature |