A double-contact switch has first and second tubular vacuum switching chambers; a stationary electrode, between the first and second vacuum switching chamber, having a first stationary contact protruding into the first chamber and a second stationary contact protruding into the second chamber; a first electrode, arranged in the first chamber, moveable axially therein, having a contact support region and sealed off from the first chamber exterior; a second electrode, arranged in the second chamber, moveable axially therein, having a contact support region and scaled off from the second chamber exterior; a first contact compression spring applying a first spring force to the first movable electrode so the first electrode contact presses onto the contact protruding into the first chamber; and a second contact compression spring applying a greater, second spring force to the second movable electrode so the second electrode contact presses onto the contact protruding into the second chamber.

A vacuum interrupter (1) is equipped with a vacuum container (2) and a fixed electrode (3) and a movable electrode (4), which are provided in the vacuum container (2). The vacuum container (2) is constructed by hermetically joining a fixed-side end plate (6) to one end portion of an insulating tube (5) and by hermetically joining a movable-side end plate (7) to the other end portion of the insulating tube (5). The insulating tube (5) is equipped at its end portion with a projection portion (5a) that projects in an axial direction of the insulating tube (5) along an outer periphery of the insulating tube (5). The insulating tube (5) is equipped at its end portion with an end plate joining portion (5b) that projects from a base end portion of the projection portion (5a) in an inner peripheral direction of the insulating tube (5). The end plate joining portion (5b) is equipped on its surface with a metallized layer (8) to which the fixed-side end plate (6) (or the movable-side end plate (7)) is joined by brazing. The metallized layer (8) is equipped with a joining portion (8a) that extends in a radial direction of the insulating tube (5), and an extension portion (8b) that extends in an axial direction of the insulating tube (5) from an end portion of the joining portion (8a) on an inner peripheral side of the insulating tube (5).

A reinforcement structure for a vacuum interrupter is disclosed. For example, in some implementations, a vacuum interrupter includes a first electrical contact; a second electrical contact; a vessel that encloses the first electrical contact and the second electrical contact in an evacuated space, the vessel including an endcap; and a reinforcement structure at an exterior surface of the endcap, the reinforcement structure including a first side, a second side, and an opening that passes through the reinforcement structure from the first side to the second side. The exterior surface of the endcap includes a recessed region, and at least a portion of the opening is positioned over the recessed region.

A vacuum bottle that is intended for an electrical switching device includes a cylindrical body of insulating material closed at each end respectively by a first metal cover and a second metal cover, and a mobile electrode that passes through the first cover and that cooperates with a fixed electrode between a closed position in which the two electrodes are in contact with each other and an open position in which the two electrodes are separated. The bottle includes the second cover corresponding to the fixed electrode of the vacuum bottle.

A reinforcement structure for a vacuum interrupter is disclosed. For example, in some implementations, a vacuum interrupter includes a first electrical contact; a second electrical contact; a vessel that encloses the first electrical contact and the second electrical contact in an evacuated space, the vessel including an endcap; and a reinforcement structure at an exterior surface of the endcap, the reinforcement structure including a first side, a second side, and an opening that passes through the reinforcement structure from the first side to the second side. The exterior surface of the endcap includes a recessed region, and at least a portion of the opening is positioned over the recessed region.

A vacuum bottle that is intended for an electrical switching device includes a cylindrical body of insulating material closed at each end respectively by a first metal cover and a second metal cover, and a mobile electrode that passes through the first cover and that cooperates with a fixed electrode between a closed position in which the two electrodes are in contact with each other and an open position in which the two electrodes are separated. The bottle includes the second cover corresponding to the fixed electrode of the vacuum bottle.