| 摘要 |
An improved simple adjustment device is provided for each of several disconnecting switch structures enabling an independent positioning of the blade-assemblies in the open and closed positions, by an adjustment of a tongue-member, which is incorporated in the operating arm assembly by adjustment bolts. Inward and outward movement of the tongue-member in the operating crank-assembly will effect only the closed position of the switch-blade assembly. Once this is made, right and left adjustment of the same tongue-member will correspondingly effect only the open position of the blade-assemblies. The aforesaid tongue-member is pivotally connected to the link-member interconnecting the blade-assembly, and it is provided with one or more elongated adjustment slots to permit the aforesaid adjustment movement in or out, and to the right or left for independent adjustment of both the open and closed circuit positions of the several blade-assemblies. As a result, the three blade-assemblies of a three-phase disconnecting switch may be so adjusted as to position all of the movable blade-assemblies in the same vertical plane in the fully opened position of the disconnecting switch structure. Similarly, the three blade-assemblies may be adjusted so that they simultaneously engage the stationary switch-jaw contacts in the closed circuit position of the device, thereby giving complete contact of all three movable blades in the closed position and yet pleasing alignment of all three movable blades in the vertical open position of the switch.
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