Abstract: An electrical switch. The electrical switch comprises at least one fixed contact, a movable contact contacting the fixed contact, and at least one extinguishing apparatus positioned after the fixed contact in an opening direction of the movable contact. A permanent magnet is further positioned after the extinguishing apparatus in the opening direction of the movable contact.

Abstract: A rotatable switching member includes a support bracket having a first arm, a second arm, and a middle portion, and a switch flange. The rotatable switching member further includes a switch bracket connected to the middle portion of the support bracket having an attachment portion and an engagement portion. A handle is fixed to the first arm of the support bracket to rotate the rotatable switching member.

Abstract: A high-voltage earthing switch is disclosed. A static contact of the earthing switch is connected with the first end of a conductive copper busbar. The second end of the conductive copper busbar is connected with a transformer. The conductive copper busbar includes a first segment and a second segment connected with the first segment. The first segment is one straight segment and an end is taken as an end of the first end of the conductive copper busbar. The first segment extends from the static contact in the direction opposite to the instantaneous action direction of the moving contact when the moving contact engages the static contact. The second segment is connected with the other end of the first segment, and extends towards the side of the first segment facing away from the moving contact.

Abstract: An isolating ground switch includes an enclosure with a frontal surface. A slide channel opens through the top of the enclosure. A conductive switch plate is received in the channel and is bi-directionally slidably positionable between the first position and the second position. A plurality of terminal studs project forwardly from the frontal surface of the enclosure and rearwardly conductively communicate with a conductive portion. When the switch plate is in the first position, the conductive portion engages the switch plate. When the switch plate is in the second position, the conductive portion is isolated from the switch plate.

Abstract: A knife switch assembly including a pair of hinged contact knives, arranged in parallel, and moveable between at least two positions. An operator device for moving the pair of contact knives between the at least two positions, and a guide member located between the two contact knives, having two projecting side parts, each projecting side part extending along at least part of a respective side of each contact knife, which side faces a corresponding side of the other contact knife.

Abstract: An input device is disclosed. In various embodiments, the input device includes a spring having a free end and a fixed end. A force transducer having a transducer beam is coupled to the free end of the spring in a manner such that a free end of the transducer beam extends away from the free end of the spring.

Abstract: A cylinder locking device is provided in which an inner cylinder is pivotably inserted into a cylinder body, a protector is disposed opposite a rear end of the inner cylinder along an insertion direction of a mechanical key, the protector enabling the mechanical key to be inserted toward the inner cylinder, and a coil-shaped spring is provided between the protector and the inner cylinder or the cylinder body, wherein the spring is formed so as to have a coil portion that extends in the axial direction of the inner cylinder and a bent portion that is bent from at least one end part of the coil portion toward an interior of the coil portion in a direction along an axis of the inner cylinder. This enables deformation of a coil-shaped spring to be prevented.

Abstract: This disclosure describes examples of an apparatus to enclose components of a switching assembly of an automatic transfer switch. In one embodiment, the apparatus, or arc chamber cover, has a housing made of material with optical properties that permit observation of the interior of the housing. A mounting assembly couples to the housing. The mounting assembly secures the apparatus to the automatic transfer switch. In one example, the mounting assembly comprises feet comprising a material with mechanical properties that can withstand pressure and other forces inside of the interior chamber. The apparatus also includes one or more baffles to control the flow of gasses and control electric arcs within the switching assembly.

Abstract: Switch assemblies and electrical distribution devices for making and breaking electrical connections in an electrical circuit are disclosed herein. One aspect of the present disclosure is directed to a switch assembly that includes a pair of electrically conductive jaws attached to a platform. The first jaw is configured to electrically connect to an incoming line of the electrical circuit, whereas the second jaw is configured to electrically connect to an outgoing line. The switch assembly also includes a blade having at least two electrically conductive plates that are attached to and spaced from each other via an electrical insulator. The blade is pivotably coupled to the platform to rotate between a disengaged position, whereat the blade is electrically decoupled from the first and second jaws, and an engaged position, whereat the blade delivers an electrical current from the incoming line through the first and second plates to the outgoing line.

Abstract: A modular test plug for voltage, current and saturation testing has a housing having a handle portion, a plurality of jaw connections for injecting upstream toward the equipment to be tested, a plurality of blade connections for injecting downstream toward a transformer, a first plurality of binding posts on a top of the housing connected to the jaw connections, and a second plurality of binding posts also on a top of the housing connected to the blade connections. Also provided is a short-defeating insert for defeating a shorting mechanism in an FT switch. This insert has a thin flat extension member extending from the body to prevent a bottom cam on a shorting blade from making contact with a shorting spring that would otherwise short the circuit when the switch handle is moved from the open position to the closed position.

Abstract: The automobile emergency stop system includes a knife switch that is wired to one of the wires running to a fuel pump of a vehicle. The system is designed for use with a parking brake such that upon breaking the circuit, electrical flow to the fuel pump ceases and the engine stops. The system is designed to close the circuit when the parking brake is not lifted. The system is adapted for all types of parking brakes, and includes hand actuated or foot actuated parking brakes. The system is designed for use as an anti-theft measure as well as a safety measure for a computer controlled engine that faults and accelerates out of control.

Abstract: An apparatus for a photovoltaic system in which multiple poles are connectable with multiple fuses is provided. The apparatus includes a rotor configured to occupy at least first and second rotational angles, a disconnect unit including a plurality of interrupter housings respectively configured to connect at least one of the multiple poles with at least one of the multiple fuses in accordance with a rotational angle of the rotor, at least one of the plurality of the interrupter housings being mutually connectable, a transmission unit disposed and configured to electrically combine the multiple poles into a lesser number of the multiple poles, a housing sized to house the rotor, the disconnect unit and the transmission unit and an actuator arm disposed at the exterior of the housing and configured to be selectively actuated to cause the rotor to occupy the at least one of the rotational angles.

Abstract: Electrical contact with double-knife coupling, particularly for disconnectors, switches or the like comprising: two knives, which face each other and can move toward or away from each other; a spacer, which delimits the maximum mutual approach of the knives; elastic elements, which contrast elastically the mutual spacing of the knives; and a main contact pin; the knives can move together to pass from an active position, in which they engage the main contact pin with their mutually facing faces, to an inactive position, in which they are disengaged from the main contact pin, or viceversa; elements for indicating the degree of wear of the region of contact of the knives with the main contact pin are provided which allow to detect when the degree of wear is greater than a maximum acceptable value and requires maintenance.

Abstract: A system for providing circuit protection, wherein the system comprises a blade suspension assembly. The assembly comprises a molded blade crossbar including integral skirts positioned to separate poles attached to the blade crossbar. Integral blade rest and blade carrier mounts further reduce complexity. Simplicity and cost advantages are obtained using poles having substantially identical blade carriers. Complexity and mechanism size is further reduced by using a combination blade stop and pivot pin hold down bracket. A base is provided with a web to further separate poles. An opening in the web is adapted to receive the suspension assembly. A separate jacket may be removably attached to the base in cooperating relation with an integral skirt to form a phase barrier between adjacent poles. The jacket may be adapted to interface with the opening in the web and overlap the skirt.

Abstract: A switch includes a casing and first and second conductive. A conductive strip made of a material that bends when subject to a temperature rise is fixed to the first blade and has a free end. A conductive plate is arranged inside the casing and in electrical connection with the second blade and movable between an engaged position where the conductive plate engages the conductive strip to form an electrical connection between the first and second blades and a disengaged position where the conductive plate disengages from the conductive strip to electrically disconnect the second blade from the first blade. When an overload occurs, an excessive current flows through the conductive strip, causing the strip to bend from a normal operation condition to a breaking condition that separates the conductive strip from the conductive plate. A link is coupled to the conductive plate and defines an elongated slot receiving the free end of the conductive strip therein.

Abstract: A switch assembly for a circuit having an insulating base, a blade, a blade hinge member that allows for rotation of the blade about a pivot position, a first contact member, identical in construction to the blade hinge member, having opposing sidewalls that electrically engage and disengage the blade in response to pivoting movement of the blade, a rotor member for engaging and rotating the blade, and a second contact member, identical in construction to blade hinge member and the first contact member, for retaining a fuse is provided. The opposing sidewalls of the either the blade hinge member or the first and second contact members, being identical in construction, are adapted to either pivotally support the blade, engage and disengage the blade, or secure the fusible member thereto, depending on their position on the insulating base. Identical spring members are connected to the blade hinge member and contact members for retention force.

Abstract: A switch comprises a long, slender stationary contact means and a movable contact means moving between an open position and a closed position. The contact zone of the contact means is separated from the electrical connection zone by a slot which opens out on the side where the movable contact means are situated in the open position. The depth of the slot is sufficient so that, when opening takes place, the current lines passing through the contact means are curved and run approximately parallel to the flank of the slot. This arrangement prevents the foot of the electrical arc from being directed towards the free end of the contact means, away from the arc extinguishing chamber.

Abstract: A rotor assembly arranged between line and load contacts of a current interrupting device for interrupting circuit current between the line and the load contacts, the rotor assembly comprising an elongated rotor shaft for mounting in a base of the current interrupting device; a contact assembly having a pair of channeled and bowed conductive blades each having free ends at opposite edges for engaging a correspondingly positioned line contact and a correspondingly positioned load contact, each of the conductive blades further having a flat indentation for receiving a spring; the contact assembly further including a pair of springs having a bowed configuration and a flat portion at each end and which are assembled with the flat indentation of each one of the pair of conductive blades to resiliently bias the conductive blades toward one another, where the springs further including a raised portion having an aperture and each pair of conductive blades extend through the aperture in the elongated rotor shaft and e

Abstract: A multi-phased switch support base including a molded top cover and a molded bottom base each having interior and exterior walls which divide the interiors. When assembled together the base is divided into compartmentalized arc chambers which function to isolate each line contact and each load contact of each phase of the switch from each other as well as from each other line and each other load contact of each of the other phases of the switch. A multiplicity of unique snap-in arc chutes and baffles to help control and extinguish the arc generated during disconnect operations of the rotor from the stationary contacts are provided in each arc chamber.

Abstract: A bar providing a switching member is pivotally connected to a terminal supported within an insulating housing. In normal operating position the knife switch is closed to two switch contacts which allow connection of power from one of the contacts to two types of circuits, such as propulsion and the auxiliary circuits of a railway car. The insulating housing may be provided with a cover which is closed when the switch is in normal closed circuit operating position. To change the position of the switch, the cover must be opened. The bar may be pivoted somewhat less than 180.degree. to engage a single contact which connects the power to one of the circuits, but not the other, for example, only to the auxiliary circuit of a railway car. The knife switch is prevented from moving 180.degree. by an end wall of the housing. But in that position it closes to one contact so that it may be viewed as being closed to power the auxiliary circuit.

Abstract: In a dual disconnect terminal assembly including a switch, the disconnect contact member for opening and closing the current paths formed by bus bar segments in the upper and lower terminal tiers is a toggle lever which includes contact bridges for each respective tier. The lever can be pivoted into three different switch positions. In a first position, the upper and lower contact bridges are connected with the bus bar segments of the upper and lower tiers, respectively, to close the current paths therebetween. In a second position, the upper and lower contact bridges are spaced from the bus bar segments of the upper and lower tiers, respectively, to open the current paths therebetween. In a third position, the upper contact bridges are connected with extensions of the bus bar segments of the upper tier to close the current path thereof and the lower contact bridges are spaced from the bus bar segments of the lower tier to open the current path thereof.

Abstract: A switch apparatus including a main housing, a fixed contact supported by the main housing, a shaft supported by the main housing for pivotal movement relative thereto, a movable contact supported by the shaft for common movement therewith, and a motor assembly for moving the shaft relative to the main housing between a closed position wherein the movable contact engages the fixed contact and an open position wherein the movable contact is spaced from the fixed contact. The shaft consists of two opposite halves mating along a longitudinally extending plane. The fixed contact may consist of two opposed spring-biased contact portions mounted in the housing.

Abstract: Improved blade-type, air dielectric switchgear apparatus is provided having spring loaded, fast acting, operator independent mechanism for selective opening and closing of internal switch contacts. Preferably, the operating mechanism includes a pair of opposed, pivotal, notched, scissor-like arms with a rotatable latch plate therebetween; a pair of latching pins are carried by the plate, and the latter is operably connected with a power spring assembly. A trip element is also provided which, upon rotation thereof in either a clockwise or counterclockwise direction, serves to shift a corresponding arm away from the latch plate to disengage the latching components. At this point a high velocity rotational movement is imparted to the latch plate by the spring assembly to rotate the latch plate to a second position wherein the plate and the opposed arm come into latching engagement.

Abstract: A compact electric safety switch including a rotatably mounted double contact blade assembly. Heavy duty compression springs are positioned under the blade assembly for rapid make and break connection between opposing line and load contact stabs. A pair of contact springs directs the contact blade during transit between the line and load contact stabs and serves to increase the contact pressure between the contact blade and the contact stabs when the contact blade is inserted therein.

Abstract: A power line/transformer switch of the isolator type, with knife members for the respective phases disposed on a common, rotatable shaft of insulating material. The respective contacts for the knives are disposed on an opposing, fixed shaft composed of insulating material. The respective shafts are mounted at one end of supports that are joined at the opposite end such that the supports constitute the legs of a V-shaped frame. The base of the V-formed supports is disposed perpendicularly on the longitudinal support bar that is parallel with the shafts, this longitudinal bar being provided with fasteners for attachment to a tower.

Abstract: For each phase to be switched, there is provided at least one pair of fixed contacts consisting of an upper fixed contact and a lower fixed contact as well as one rotary or movable contact. The rotary contact is rotatable about an axis of rotation and is in constant engagement with one of the fixed contacts. The rotary or movable contact is supported on a support made of insulating material. The support is also rotatable. To reduce the torsion moment or torque required for turning the rotary contact to a minimum, the rotatable support possesses, in the vicinity of the rotary or movable contacts, a cranked or bent section in the form of a crank shaft in which an open-ended recess or aperture is provided for each contact. There recesses or apertures carry the rotary or movable contact.

Abstract: An electric power distribution switch including an auxiliary biasing mechanism to assist the operator in closing the switch to overcome the resultant repulsive forces which oppose the closing forces provided by the operator.

Abstract: A modular section insulator switch having a unique base on which two feeder cable assemblies and at least two trolley line assemblies may be provided in combination with a switch assembly. In use, different sized feeder cable assemblies and switch assemblies may be interchanged quickly while the switch is in-line to accommodate higher amperage feeder cables because of the unique base.

Abstract: The disclosed circuit breaker includes a movable contact which enters the space between stationary contact jaws, the movable contact acting through a spring to bias a jaw-closing toggle toward erect condition, so that contacts on the contact jaws firmly grip the movable contact.

Abstract: The present switch has a main switch lever so pivoted in the trough of an insulating housing, that the lever plays in a path, slightly deviating from the troughway. This assures contact pressure between the conducting lever and fixed contacts along the troughway. A conducting gate switch lever is designed for making and breaking the feeding connection between an electrical source and the main lever. With the gate lever "off", the main lever may pass along a row of fixed contacts without any effect, until the selected contact is reached. Then, the gate lever may be energized by making connection with the source; thus a piece of equipment is fed over the selected fixed contact. The present switch safely handles, unlike a rotating switch, ionized gases, because these gases do not drift by several contacts on their way out. No unwanted electrical bridging to other than the selected pieces of equipment will occur.

Abstract: A printed circuit contact of the type for attachment to a control device such as a rotary switch and a method for forming the printed circuit contact, the printed circuit contact comprising an elongated rigid tail resistant to bending and an integrally connected spring clip comprised of a pair of resilient jaws, the jaws being formed from material having a thickness less than the thickness of the tail and wherein the jaws and the tail are formed from a single piece of material. The method of forming the printed circuit contact includes milling a longitudinal groove in one surface of a strip of sheet stock so that a portion of the sheet stock is substantially thinner than the remainder. The sheet stock is then stamped and subjected to bending operations such that the thinner milled portion of the sheet stock is employed to form the jaws of the clip and the thicker portion of the stock forms the tail.

Abstract: An electric key-operated switch adapted to be mounted on the exterior of a vehicle or structure to arm or disarm an alarm system. A key is to be rotated in a cylinder between two positions, each of which controls a separate circuit that is normally open when the contact rotor carried by the cylinder is not engaged with contacts connected to the respective circuit. The invention provides more positive electrical engagement and a novel structure for economically adjusting the limits of positions of the contact rotor so that the key may readily be inserted and removed.

Abstract: A rotary electrical switch is provided of the type that includes a stator body of substantially cylindrical shape having a cylindrical opening coaxially disposed therein. The stator body includes a plurality of electrical contacts embedded in the stator body at circumferentially spaced positions therearound and extending radially inward from the cylindrical opening in the stator body and having a pair of parallel disposed planar contact surfaces, all of the contacts being disposed in a common plane orthogonal to the longitudinal axis of the cylindrical opening. A rotor body is rotatably disposed in the cylindrical opening and a contactor clip including a pair of contactors electrically and resiliently engaging both planar contact surfaces of respective ones of the contacts is constrained to rotate with the rotor body.