Abstract: 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.

Abstract: An improved disconnecting switch is provided having an improved hinging structure which provides the traditional movements of a vertical break disconnect switch-blade in a simple and unique way. The switch-blade rotates about its longitudinal axis on a blade plug which is supported by a hinge pin that passes at a right angle through slots provided in the blade and a hole in the blade plug. The slots define the amount of rotation and prevent the switch-blade from sliding along the longitudinal axis. The structure also allows the switch-blade to pivot open on the axis of the hinge pin. The switch-blade contact on the hinge end of the switch may be used as the supporting member for the hinge pin.

Abstract: An improved shaft-clamping device is provided utilizing a loop-bolt which wraps spirally around the shaft, or pipe to be clamped to another member, and such member is provided with a pair of spaced mounting apertures, through which the legs of the loop-bolt project, and have fastening means secured thereto, such as nuts, for example.Preferably, to increase the friction between the loop-bolt, or shaft-clamping device to the shaft, or pipe, the loop-bolt is threaded. This not only increases the frictional relationship between the shaft, or pipe and the other member, to which the shaft, or pipe is to be clamped, but, additionally, the threaded condition of the legs of the loop-bolt allow the clamping nuts to be threadedly secured thereto without further manufacturing operations. Heat treatment of the threaded loop-bolt brings the best result since the biting action is increased and the loop-bolt can be reused without flattening the threads.

Abstract: A circuit breaker operating mechanism is disclosed having the opening spring thereof disposed within the closing spring thereof. The closing spring has one end thereof affixed to the operating mechanism support base while the other end thereof is movable relative to the support base for being charged and discharged. The encircled opening spring has a first end thereof which is affixed relative to the mechanism support frame. The other end of the opening spring is movable. However, the latter movable end is held temporarily fixed relative to the support base during a charging operation for the closing spring so that the opening spring will be charged with the charging of the closing spring. When a circuit breaker opening operation is necessitated, the non-fixed end of the opening spring is released, thus allowing the opening spring to discharge while the closing spring remains charged.

Abstract: A single barrel puffer circuit breaker apparatus is taught in which compressed sulfur hexafluoride gas is forced into the region of an arc. The arc is struck between hollow, cylindrical conductors during a circuit breaker opening operation. The heated gas is exited from the region of the arc by way of the internal portion of the hollow conductors. At the other ends of the hollow conductors the gas is vented into enlarged regions which are partially bounded by the single barrel. The single barrel provides the multiple functions of support, insulations and gas storage. Gas coolers are provided, one of which may cool the hot gase as it radially diffuses therethrough and the other of which may cool hot gas as it transversely diffuses therethrough. The coolers tend to reduce the energy of the gas by reducing its temperature and consequently its pressure, thus assisting in protecting the inner surface of the single barrel from charring and protecting the entire barrel from rupturing.

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.