| 摘要 |
<p>Disclosed is an electric switching device of the type having a contact system including two stationary contact bars and a movable contact bridge for interconnecting the bars. To convert the switching device from a circuit maker to a circuit breaker, or vice versa, there is provided a converting member in the form of a swingable arm which acts on a contact bridge and cooperates with a slidably supported cam track which is turnable by 180.degree. so as to displace the contact bridge into a circuit making position or a circuit breaking position relative to the stationary contact bars.</p> |
