| Year | 1968 |
| Date | 19-Jul |
| Volume | 134 |
| Issue | 3,349 |
| Page | 715 |
| Category | Electrical |
| Part | |
| Title | An Electrical Circuit Breaker |
| Author | Martin Cleeve |
| Notes | Working demonstration assembly. Mechanical action, hand tripping, electrical tripping, constructional notes, the handle assembly |