Abstract: A transfer switch configured to transfer connection of each power conductor and neutral conductor of a load between two power supplies. The transfer switch includes a switch member configured to transfer each of the connections in tandem. The transfer switch disconnects each power conductor prior to disconnecting the neutral conductor of the first supply when disconnecting the load from either power supply and connects the neutral connector prior to connecting each power conductor when connecting the load to either power supply.

Abstract: At least one electrical contactor is provided that includes a fixed contact and a movable contact. The fixed contact includes a center leg and first and second arms that extend in opposite directions from the center leg. The movable contact associated with each fixed contact includes first and second blades positioned on opposite sides of the center leg. The first and second blades extend parallel to the center leg of the fixed contact such that when current flows through the electrical contactor, the current flow creates a force to push the first and second blades into the first and second arms of the fixed contact. The electrical contactor includes an actuating arrangement having a pair of cam members. The movement of the cam members causes pegs on each of the first and second blades to travel within the cam channel, thus opening and closing the contactor arrangement.

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: A movable arm assembly for a circuit breaker includes a unitary structure having two blade portions being connected by a bend location. The bend location forms a gapless surface region. A contact is connected to the unitary structure wherein the gapless surface region and a contact surface of the contact are connected to form a joint therebetween. A method for forming a movable arm assembly includes forming a blank from a conductive sheet, the blank including a unitary structure having two blade portions, bending the blade portion at a bend location to form a gapless surface region at the bend location and joining a contact to the unitary structure on the gapless surface region at the bend location to form a movable arm assembly.

Abstract: A movable contactor of a circuit breaker, comprising: a cage for angularly rotating with one side as a axis; a plurality of fingers disposed at the cage, including a path body portion having a predetermined thickness and having one end of an inclined plane, a wire connecting portion extending from one end of the path body portion with steps so as to have a certain area and having one horizontal plane, and an arc discharge portion extending from another end of the path body portion with a predetermined length so as to induce the discharge of the arc; and terminals each coupled to each of the fingers and for contacting or being separated from a fixed contactor according to the angular-rotation of the cage. Accordingly, the fabrication process for fingers is facilitated and the material cost necessary to fabricate the fingers can be reduced, thereby reducing the fabrication cost.

Abstract: The knob fitting structure is provided with a knob; an operation shaft to which the knob is to be fitted; engaging stubs provided on one of the knob and the operation shaft and supporting side walls having snap-in holes 10f provided on the other, wherein the engaging stubs, when they are inserted into the snap-in holes, after elastically deforming the supporting side walls in a direction of thickness of the engaging stubs, are engaged within the snap-in holes, and the supporting side walls are provided with a slit communicating with outside through the snap-in holes.

Abstract: An electrical switch (10) has a contact system in which first and second contact protrusions (22a, 22b; 22a′, 22b′; 22a″, 22b″) are offset from the center line of the long axis of a twistable movable contact arm. In a preferred embodiment the movable contact (22) is formed with a groove (22e, 22e′) formed through the contact running generally along the center line to form first and second generally wedge shaped contacts on either side of the center line. In one preferred embodiment, converging surfaces (22f, 22g) form a groove with an angle alpha of approximately 125° and approximately 158° in another preferred embodiment. In another preferred embodiment the protrusions (22a″, 22b″) are generally hemispherical.

Abstract: A switching contact system of a low-voltage circuit breaker has a bus with cord-like flexible conductors attached thereto. The flexible conductors are accommodated between a connecting surface (30) of the bus (26) and an end piece (27), which is in contact with the connecting surface (30) of the bus (26) with at least two contact surfaces. The parts are connected by heat effect, such as soldering or electron beam welding.

Abstract: According to the invention, there is provided an inbred corn plant designated 17DHD7. This invention thus relates to the plants, seeds and tissue cultures of the inbred corn plant 17DHD7, and to methods for producing a corn plant produced by crossing the inbred plant 17DHD7 with itself or with another corn plant, such as another inbred. This invention further relates to corn seeds and plants produced by crossing the inbred plant 17DHD7 with another corn plant, such as another inbred, and to crosses with related species. This invention further relates to the inbred and hybrid genetic complements of the inbred corn plant 17DHD7, and also to the RFLP and genetic isozyme typing profiles of inbred corn plant 17DHD7.

Abstract: An emergency color and tactile coded identification plate comprising a face plate, a clear tamper resistant plastic center, and a back plate is used to control access to and from locations within and around a secured facility. The face plate has configured openings that correspond to configured markings on the back plate such that the configured markings on the back plate fill the configured openings of the face plate when the identification plate is assembled by aligning and bringing the face plate, the clear plastic center, and the back plate into contact with each other to form a single unit. The present invention provides a multiple indicia emergency plate that allows fast identification of the correct key for a specific door in a secured facility that uses both visual and tactile indicia.

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 arrangement for a change-over contact relay has a movable contact spring (2), on the free end (3) of which switching contact pieces (5, 6) are arranged on both sides, the current to be switched being supplied via an electrical connecting line (9) to the switching contact pieces (5, 6). [2.2] In order to permit a mass distribution, which is as symmetrical as possible, in the region of the free end (3) of the contact spring (2) and a supply, which is as loss-free as possible, of the current to be switched to the switching contact pieces (5, 6), [it is provided that] the switching contact pieces (5, 6) are connected directly in an electrically conducting manner to the one end (8) of the electrical connecting line (9). For this purpose, the one end (8) of the connecting line (9) or a switching contact piece (5, 6) preferably has an extension piece, the end face of which forms a joining face for the purpose of producing the electrically conducting connection.

Abstract: A molded case circuit breaker movable contact arm electrically connects with the circuit breaker load terminal requiring only a small diameter auxiliary electrical conducting braid by pivotally arranging the contact arm within its support. The contact arm is nickel-plated prior to attachment of the contact to insure high current circuit interruption withtout damage to the contact or the contact arm.

Abstract: An electrical switch assembly is made with a braided electrical conductor having a densified end which has reduced porosity from the braided wire. Preferably, the densified end is formed by squeezing copper wires with a solder matrix to reduce the air in the densified end so that it has over 95% solids. A solder layer is formed between the densified end and the switch element, preferably by using a foil of silver braze which is melted between the densified end and the switch element. In the preferred method of forming the densified end, the solder and copper are heated and squeezed at pressures in the range of 500-750 pounds under a liquid blanket of material to limit copper oxidation.

Abstract: The support piece of a circuit-breaker's movable contact assembly has a one piece structure including a rigid sole piece carrying the mobile contacts and a resilient blade facing the sole piece, at a distance therefrom, and forming a contact pressure spring.

Abstract: A contact arrangement for a relay having a high breaking current capacity. A contact spring is split in fork-like fashion so as to form two fork ends at its free end. The contact spring is opposite two cooperating contact elements in the form of a double contact or two contacts to be bridged. The two fork ends of the contact spring are directly connected to one another via a welded on contact strip. A stranded conductor is welded directly to a freely accessible center portion of the contact strip between the two fork ends. Thus, the two contacting locations of the contact spring are connected to one another or to a power terminal in a low-loss fashion without employing an expensive central contact spring having good conductivity. Rather, a spring steel having a relatively poor conductivity may be employed.

Abstract: An air disconnect switch incorporates a unique arrangement of an ice breaking self-polishing current transfer horn arrangement which transfers the current to a puffer-type interrupter to effect circuit interruption prior to the disconnect switch being fully opened; the puffer-type interrupter is a dielectric insulated device which has its operating mechanism disposed within the dielectric insulating medium so that the system has no fast-moving external parts and provides a direct drive with minimum maintenance of the mechanism parts. The porcelain tube serves both as the interrupter housing and as the mechanism housing.

Abstract: The present invention concerns a contact arrangement with a first contact and a second contact. The second contact has two contact members between which the first contact is received. A contact support resiliently supports one of the first and second contacts so that the supported contact is resiliently mounted relative to the contact support means and movable relative to the other contact.