Abstract: An electrical switching apparatus includes a first pole unit, a second pole unit, and a busbar assembly interconnecting the first pole unit with the second pole unit in series or in parallel. A first mechanism is configured to switch the first pole unit between its open and closed conditions. A second mechanism is configured to switch the second pole unit between its open and closed conditions. An actuating assembly is configured to actuate the first and second mechanisms to switch the first and second pole units from their open conditions to their closed conditions simultaneously, and to switch the first and second pole units from their closed conditions to their open conditions simultaneously.

Abstract: An electrical switching apparatus includes a first pole unit, a second pole unit, and a busbar assembly interconnecting the first pole unit with the second pole unit in series or in parallel. A first mechanism is configured to switch the first pole unit between its open and closed conditions. A second mechanism is configured to switch the second pole unit between its open and closed conditions. An actuating assembly is configured to actuate the first and second mechanisms to switch the first and second pole units from their open conditions to their closed conditions simultaneously, and to switch the first and second pole units from their closed conditions to their open conditions simultaneously.

Abstract: A window assembly is for an enclosure. The enclosure has a plurality of walls. The window assembly includes a cover member structured to be coupled to each of the plurality of walls in order to form an enclosed region; a window member coupled to the cover member; a frame member coupled to the cover member; and a number of stud members each secured to the frame member and extending through the cover member. The cover member is located between the frame member and the window member.

Abstract: A window assembly is for an enclosure. The enclosure has a plurality of walls. The window assembly includes a cover member structured to be coupled to each of the plurality of walls in order to form an enclosed region; a window member coupled to the cover member; a frame member coupled to the cover member; and a number of stud members each secured to the frame member and extending through the cover member. The cover member is located between the frame member and the window member.

Abstract: A window assembly is for an enclosure. The enclosure has a plurality of walls. The window assembly includes a cover member structured to be coupled to each of the plurality of walls in order to form an enclosed region; a window member coupled to the cover member; a frame member coupled to the cover member; and a number of stud members each secured to the frame member and extending through the cover member. The cover member is located between the frame member and the window member.

Abstract: A window assembly is for an enclosure. The enclosure has a plurality of walls. The window assembly includes a cover member structured to be coupled to each of the plurality of walls in order to form an enclosed region; a window member coupled to the cover member; a frame member coupled to the cover member; and a number of stud members each secured to the frame member and extending through the cover member. The cover member is located between the frame member and the window member.

Abstract: An improved arc extinction apparatus that can be used in an improved DC switch apparatus includes a pair of magnetic field elements in the exemplary form of permanent magnets to apply Lorentz forces to the arcs. The magnetic fields are arranged in the vicinity of the air gaps that form between the ends of a pivoting conductor and a pair of contacts such that the system is optimized to extinguish an arc at one air gap when current is flowing through the conductor in a first direction and is further optimized to extinguish an arc at the other air gap when current is flowing in an opposite direction through the conductor. This is accomplished by providing a magnet at each air gap of the circuit, with the magnetic fields being oriented parallel with the pivot axis and having their north poles pointed in the same direction.

Abstract: An improved arc extinction apparatus that can be used in an improved DC switch apparatus includes a pair of magnetic field elements in the exemplary form of permanent magnets to apply Lorentz forces to the arcs. The magnetic fields are arranged in the vicinity of the air gaps that form between the ends of a pivoting conductor and a pair of contacts such that the system is optimized to extinguish an arc at one air gap when current is flowing through the conductor in a first direction and is further optimized to extinguish an arc at the other air gap when current is flowing in an opposite direction through the conductor. This is accomplished by providing a magnet at each air gap of the circuit, with the magnetic fields being oriented parallel with the pivot axis and having their north poles pointed in the same direction.

Abstract: A safety switch with a spring toggle linkage which causes the switch shaft to rapidly rotate for opening and closing the switch has a lost motion coupling between the switch handle and the switch shaft which engages at about the point of toggling to assure positive operation of the switch.