| 摘要 |
An electrical switch having first and second sets of contacts and an operating member which is associated with both sets of contacts such that both sets of contacts can be moved from one of their operative states to the other operative state by a single movement of the operating member. A first electromagnetic arrangement is provided whereby the first set of contacts can be returned from the closed state to the open state by the application to the first electromagnetic arrangement of an electrical signal, and there is a second electromagnetic arrangement whereby the second set of contacts can be returned from the closed state to the open state by the application to the second electromagnetic arrangement of the electrical signal. The switch is so arranged that the first set of electrical contacts is returned by the electrical signal to its open state in advance of the return of the second set of electrical contacts to its open state. |
