Patent ID: 6975499
Filing Date: 2005-12-13
Classification: H01G

Abstract:
1. A vacuum variable capacitor, comprising: a vacuum vessel, the vacuum vessel comprising an insulating tube and stationary and movable side-end plates mounted to respective ends of the insulating tube; a movable-electrode support plate arranged in the vacuum vessel, the movable-electrode support plate facing the stationary side-end plate; stationary and movable electrodes oppositely arranged on the stationary side-end plate and the movable-electrode support plate, respectively; a slide shaft having a first end mounted to the movable-electrode support plate and a second end arranged through the movable side-end plate and connected to an operation mechanism; a slide guide having the slide shaft slidably arranged therethrough; energization bellows arranged in the vacuum vessel, the energization bellows having ends mounted to the movable-electrode support plate and the movable side-end plate, respectively; a slide-guide support arranged inside the energization bellows, the slide-guide support being mounted to the movable side-end plate, the slide-guide support supporting the slide guide; heat shielding bellows arranged inside the energization bellows and outside the slide-guide support, the heat shielding bellows having ends mounted to the movable-electrode support plate and the movable side-end plate, respectively; and a device interposed between the two bellows, the device preventing transfer of heat generated in the energization bellows.