| 摘要 |
An electromechanical switch including a non-magnetic cup shaped housing, the interior of which is sealed from the atmosphere with a seal assembly. A first electric terminal extends through the seal assembly and is connected to a coil spring. A second terminal includes a stationary electrode. The electrode extends through the seal assembly and through the coil spring. The coil spring supports a movable contact. A permanent magnet is selectively movable via a solenoid in close proximity to the contact member for selectively moving the contact member in and out of contact with electrode. In the closed position, electric current flows between the first and second terminals and through the coil spring. In another embodiment, an electric magnet provides the necessary flux for selectively moving the contact member. In yet another embodiment, two electrodes extend through the seal assembly and the movable contact is selectively placed in and out of contact with both of the electrodes for selectively controlling electric current flow between the terminals. The coil spring is preferably made of beryllium copper and the movable contact and electrodes are made of molybdenum. The interior of the non-magnetic housing can be evacuated placing it in a vacuum or filled with an arc quenching gas.
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