Abstract: An improved electromechanically-operated valve is provided having a main balanced piston-valve controlling an inlet port, and a cooperable relatively-movable valve-stem piston-assembly electrically actuated by a repulsion coil, for example, or a similar electrically-energizable coil, repelling an anvil, for example, secured to said valve-stem piston-assembly.Upon reduced voltage, the actuating coil has less energy, and is only able to effect opening movement of the valve-stem piston-assembly, which, upon its opening motion, opens, by valve action, an additional piston-surface area for a high-pressure region fed by a bypassing high-pressure gas-inlet port.

Abstract: A relatively-small-diameter conductive cylindrical tubing, or metallic rod element is wound helically in the shape of the desired electrostatic metallic shield element. The turns of the metallic coil, thus formed, may be cemented, soldered, welded or otherwise fastened together to thereby provide rigidity to the metallic shield, if desired. The turns of the metallic coil may, however, be separated from one another by a space. One or both ends of the coil may be bent transversely away from the shield's surface for use both as a physical support during casting, or encapsulation, and, alternatively, as conducting leads for grounding purposes, or for terminal connection purposes. The body portion of the insulating member may be composed of any suitable casting material, such as resinous material, either epoxy resin, or polyester resin, or Butyl rubber.

Abstract: A gas blast circuit interrupter of the puffer piston type is provided having one relatively solid contact and one vented contact which make valve closed engagement in the closed position. In all embodiments of the invention, the insulating nozzle and the vented contact are fixedly interconnected by means of a vented electrically conducting ring. The vented contact comprises a cluster nozzle for venting gas during contact parting and for grasping the solid conductor during contact. The cooperating arrangement among the parts allows the puffer gas to vent through parallel paths.

Abstract: An improved high-voltage circuit-interrupter of the gas-blast type is provided having improved gas-partitioning and particle-collecting means so provided as to prevent the entrance of small insulating, or metallic particles into the high-pressure storage chamber of the interrupter. A non-perforated insulating support member provides support for the high-voltage conductor, and, additionally, seals off the high-pressure gaseous storage region within the high-pressure chamber from the contact interrupting chamber, where, due to contact engagement and disengagement, relatively small metallic particles may be generated, and if allowed to wander into the high-pressure storage chamber provided between the high-voltage conductor and the outer grounded tube of the high-pressure storage chamber, would precipitate, or encourage high-voltage breakdown, or flashover between these two conducting members which are at widely-different voltages, say, for example, 200 K.V.

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.

Abstract: An improved heating means is provided for heating the gas in a high-voltage gas-type circuit-interrupter of the type utilizing an arc-extinguishing gas, which may be subject to the disadvantage of liquefaction during relatively moderate temperatures. The construction is such that primary and secondary heating means are associated with a convection chamber, the primary heating means being responsive to a probe monitoring the actual gas temperature provided within the convection chamber and maintains the gas temperature within the convection chamber to a predetermined temperature.Preferably, a secondary heating bank is additionally provided, assuming the form, for example, of one or more separate heater elements, which are turned on and off by the external atmospheric ambient temperature.For certain applications, the convection chamber is tilted, or slanted with respect to the arc-extinguishing assemblage, the latter extending upwardly at an angle with respect to the lower-disposed heating chamber.