Abstract: An enclosed cylindrical vessel has a cover which is keyed to the vessel. The vessel encloses the separable main contacts and operating mechanism of a circuit interrupter. One of the terminals for the circuit interrupter is disposed on the side of the cylindrical vessel. The other terminal comprises the cover. It is keyed to the inside of the cylindrical vessel with a contiguous mass of hardened epoxy cement. The contiguous mass exists in hardened form between an indentation in the inner wall of the cylindrical vessel and an indentation in the outer wall of the cover-terminal. This prevents the cover from being forced out of the end of the cylindrical terminal by the pressure of gas inside. In addition, radial holes are disposed in the side walls of the cylindrical vessel. The contiguous mass of hardened epoxy material also occupies the latter holes and prevents the terminal cover from rotating in the vessel.

Abstract: An improved operating mechanism of the energy-storage type is provided for circuit-interrupting structures, including an energy-storing means having the energy content therein increased by the movement of a movable member, during the closing operation and a collapsible toggle-linkage is provided between the energy-storing means and the separable arcing contact structure of the circuit-interrupter structure. Improved means are provided for tripping operation, and thereby effecting the collapse of said toggle-linkage to effect the opening of said separable contact structure, and a second releasing means is preferably provided for discharging the stored-energy of the energy-storing means to effect thereby the straightening of said toggle-linkage and the consequent closing of the separable contacts within the circuit-interrupter during the closing operation.

Abstract: A quick-acting movable-column tripping device is provided as an optional feature of either circuit-interrupters, supported by upstanding insulating column structures, or, alternatively, in connection with circuit-interrupters having a serially-related disconnecting switchblade, providing a visible open-circuit gap, so that a minimum of time is utilized in a tripping operation of the circuit-interrupter. Otherwise, there would be a considerably-delayed action caused by the normal, or inherent lost-motion provided in the loose linkages, which normally are used to effect operative movement of the movable relatively massive supporting column structure.The quick-acting, accelerating tripping device of the present invention provides relative fast motion between the upstanding rotatable supporting column structure and a base-spindle device, the latter of which is operatively mechanically linked to the motor-operated mechanism, for example, of the switch structure, which may be relatively slow in operation.

Abstract: An improved puffer-type compressed-gas circuit-interrupter is provided having tubular stationary and movable contacts, which make a valve-closed, gas-retaining, abutting, contacting action for a predetermined portion of the opening travel of the interrupter.A lazy-tong-multiplying operator is provided with the guide-rail means therefor supported from one end of a gas-retaining hollow casing structure. Additionally, a movable metallic cooler member is shielded by the movable nozzle movable with the movable operating gas-compressing cylinder.

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: A high voltage switch including a rotatable insulating column adjusted by means of an operating arm assembly including two bolt circles of equal radius and unequal spacing.