| 200 / | HD | ELECTRICITY: CIRCUIT MAKERS AND BREAKERS |
| 402 | DF | SNAP {4} |
| 405 | DF | .~ Double snap {17} |
| 424 | DF | .~.~ Contact movement is blocked until spring is charged {1} |
| 425 | DF | .~.~.~ Blocked by distinct latch {3} |
| 426 | DF | .~.~.~.~ Driving and driven element oscillate about a common axis {1} |
| 427 | ![]() | .~.~.~.~.~ With reciprocating contact |