Abstract: A movable contacting device in a circuit breaker comprises: a crossbar linked with the opening/closing mechanism and carried so as to pivot cooperatively with the opening/closing mechanism; a movable contact arm engaged, so as to cooperational with the crossbar, with a shaft fitted into a mutually opposing recesses in the crossbar; and a movable contact arm support fixed to the case accomodating the opening/closing mechanism and having mutually opposing through-holes through which the shaft is passed; and the movable contact being configured so that the movable contact slides between surfaces of movable contact arm support having the mutually opposing through-holes; and the construction of a single-pole portion of the movable contact arm is constituted by arranging in parallel two movable contact arm members each having a movable contact at one end, and in a shaft-supporting portion at the other end, an elastic member is sandwiched between the two movable contact arm members.

Abstract: An electric device including an electric switch having a plurality of contact members arranged in series to form a plurality of breaking points arranged in series. One of the contact members at each breaking point is movable. A drive is arranged to actuate each movable contact member. The drive is arranged to effect simultaneous movement of the movable contact members. A commutation circuit is connected in parallel with the electric switch. Each contact member constitutes a part of a contact element, which contact elements are arranged in series. The contact elements have conducting and insulating parts. Every second contact element is movable in relation the others so that movement effects a breaking or closing position of the electric switch. The invention also includes a current limiter such as an electric device and also an electric power network provided with such a current limiter.

Abstract: An electrical circuit interrupter comprising a housing with an operating mechanism disposed therein and including first and second separable main contacts disposed within the housing is taught. There is an electrically conducting first contact support which has a shape which substantially doubles back upon itself and which has parallel, spaced apart first and second legs forming a central region. An electrically insulating support member is supplied which is disposed in the central region and has a substantial portion outboard of the central region in a disposition to shield a portion of the contact support member. It also has a portion which captures the first contact support member. In addition, magnetic plates are disposed within the central region for cooperating with other closed loop magnetic plates outside of the support member for providing a slot motor action for the movable contact. An arc runner is provided which is trapped between the support member and the contact support conductor.

Abstract: In a movable contactor device in a circuit breaker, two contactor elements are arranged in such a manner that they are in parallel with each other and are independent of each other, to form a movable contactor for each phase. The two contactor elements have respective movable contacts separated from each other, and are rotatably coupled through a supporting shaft to a connecting conductor having three prong-shaped contact pieces. The number of contact points with the stationary contact can be increased as much.

Abstract: A contact blade assembly for a circuit breaker comprises a blade carrier, an elongated blade, and a toggle spring. The blade carrier includes a blade pivot and a first spring pivot. The elongated blade has an electrical contact mounted thereto and includes a second spring pivot. The blade is rotatably mounted to the blade pivot of the blade carrier for rotation between a closed position and an open position. The toggle spring is connected to the first spring pivot at one end and to the second spring pivot at the other end. The first spring pivot, the second spring pivot, and the blade pivot are arranged such that a toggle condition associated with the rotation of the blade relative to the blade carrier corresponds to the blade pivot being located in line and between the first and second spring pivots. The toggle spring biases the blade away from the toggle condition in a first direction while the blade is disposed in the closed position.

Abstract: A pivoting electrical connected useable in a molded case circuit breaker including a pair of contact plates for contacting the circular contact member of a contact carrying arm. The pivoting electrical connection provides at least three contact locations between the contact plates and the circular contact member. The contact locations provide current paths between a first terminal coupled to the contact plates and an electrical contact fixed to the contact carrying arm. The pivoting electrical connection allows the contact on the arm and an electrical contact coupled to a second terminal to be opened and closed.

Abstract: A contact arrangement for switchgear with multiple disconnects by contact points connected in parallel of two contact bridges aligned in a contact actuation link uses a spring collar for a contact pressure spring. The spring collar has cutouts transverse to the spring-action direction into which the contact bridges with the spring collars can be inserted and locked in place transverse to their longitudinal direction. The spring collar is rounded at two facing sliding surfaces in the contact actuation link aligned transverse to the longitudinal direction of the contact bridges. This assures optimal fitting of the contact bridges to the fixed contact components without jamming the spring collar in the alignment.

Abstract: A molded case circuit breaker movable contact arm or carrier electrically connects with the circuit breaker trip unit or load terminal without requiring a flexible electrical conducting braid. The contact carrier is pivotally arranged within a contact carrier support to which the trip unit or load terminal lug is attached. The contact carrier pivot pin is supported on a pair of parallel posts extending from the contact carrier and a spring clip is positioned around the parallel posts and the pivoting end of the contact carrier to promote good electric transport without interfering with the rotational movement of the contact carrier.

Abstract: A high voltage multi-position type three phase electrical switch having stationary and movable contacts which are supported, respectively, on relatively fixed and movable contact supports internally of a switch casing. The contact supports are interchangeable and are made of a nonconductive molded plastic. The contact supports are adapted to selectively support either conductive contact support bars on which relatively stationary spring contacts are mounted, or contact blades which, in association with movement of a movable contact support, may be closed into spring contacts carried on an associated relatively fixed contact support. The movable contact blades comprise flexible braided electrical conductors having conductive contact sleeves swaged on their opposite ends so that the contact end portions define contact bars which are substantially solid in transverse cross section.

Abstract: An electric circuit disconnect switch has an improved hinge terminal mounting in which a rotatable blade has a hinge terminal end portion in which opposite faces are provided with sockets which are essentially hemispherical about a common axis, and a terminal connector has a bifurcated end portion defining a bight and effectively parallel arms which flank said faces of the blade and have threaded holes on said common axis near their free ends. Pivot studs which screw into the holes have hemispherical extremities seated in the sockets so that seating force applied by turning the studs spreads the arms and thus thrusts the pivot studs firmly into the sockets. A compression spring and an adjusting bolt and nut between the bight and the studs biases the arms toward one another with adjustable force.