Title: Motion-multiplying linkage-mechanism for sealed-casing structures

• Summary
• Claims
• Description
• View all

Abstract: An improved motion-multiplying linkage-mechanism is provided for the movable contact structure of a circuit-interrupter, particularly one of the sealed-casing type, enclosing a suitable arc-extinguishing medium, such as a highly efficient arc-extinguishing gas, such as compressed sulfur-hexafluoride (SF.sub.6) gas, for example. However, where desired, the motion-multiplying mechanism of the present invention may, additionally, be utilized in vacuum interrupters, or in other types of arc-extinguishing devices where the surrounding casing structure is of a sealed type. In accordance with the present invention, a sylphon bellows is secured to an end metallic plate of the sealed casing, and also affixed to the contact operating rod extending therewithin. A motion-multiplying mechanism, such as a lazy-tong, or pantograph-linkage assembly, is attached to the interior end of the contact operating rod, so that for a short initiating driving travel of the contact operating rod from a suitable mechanism, provided externally of the sealed-casing structure, a considerably increased length of travel for the movable contact structure is obtained. Suitable guideways are preferably provided for guiding the linear travel of the lazy-tong linkage structure so as to effect an accurate linear driving motion of the linkage.


Do you think this is a good invention? Vote now: