Abstract: A stab assembly includes at least one bus bar having and an elongated extension, and a number of line terminals including at least one twofold line terminal. The twofold line terminal has a plug-on portion having an engaging portion. The engaging portion substantially overlays and engages the elongated extension.

Abstract: A power busway interposer enables a power busway assembly of energized busway segments to be extended, via coupling additional busway segments to the assembly, while maintaining energization of the assembly. As a result, a power busway assembly providing power support to electrical loads can be extended while maintaining power support to the electrical loads. The interposer includes separate sets of connectors that couple with separate busway segments and a switching device which selectively electrically couples the connectors, so that a power busway connector can be de-energized while another separate power busway connector is coupled to an energized busway segment and then subsequently energized.

Abstract: A breaker assembly is disclosed comprising a breaker board having a bus bar including a first engagement feature and a breaker module having a line side connector including a second engagement feature engaging the first engagement feature to inhibit separation of the breaker module from the breaker board. The breaker board can further include a board mount having a first alignment feature, and the breaker module can further include a module mount engaging the board mount and having a second alignment feature engaging the first alignment feature. In another aspect of the invention, the breaker board includes board connections, the breaker module includes breaker connections (e.g., blind mate connections), and the board connections are engaged with the breaker connections. In another aspect of the invention, the breaker module includes a ledge that defines an undercut to facilitate prying of the breaker module from the breaker board.

Abstract: A coordinate measuring unit measures an x-coordinate, a y-coordinate and a z-coordinate indicating an object position according to a change in the position of an object located within a predetermined distance from a panel surface. A display control unit causes a display unit to display a first mark image defining a peripheral distance of a positon determined by the x- and y-coordinates together with predetermined images. The display control unit causes the display unit to display the first mark image such that an area defined by the first mark image becomes smaller as the z-coordinate becomes smaller.

Abstract: A modular relay sub-assembly is provided. The modular relay sub-assembly can include a first housing portion, a second housing portion, a conductor having a first contact, and a split conductor. The second housing portion may be attached to a surface of the first housing portion. The conductor may be disposed inside a cavity formed by the two housing portions. The first contact may be accessible through a first opening in the first housing portion. The split conductor may include a first portion, a second portion, and a contact. The split conductor being disposed inside the cavity formed by the first and second housing portions. The second portion may be disposed at a position electrically isolated from the first portion. The contact of the split conductor can be accessible through a second opening in the first housing portion. The split conductor can be positioned to selectively contact the conductor.

Abstract: An exemplary electric switch mounting arrangement includes a housing and a stationary contact to be mounted to an aperture in a wall of the housing. The arrangement having a compensation component within the interior area of the aperture for allowing stationary contacts of two different sizes to be mounted to the aperture, which compensation component includes one or more projections formed on the housing or the stationary contact and/or one or more recesses formed on the housing or stationary contact for receiving the one or more projections.

Abstract: A pusher assembly for use in a contact block assembly is disclosed. The pusher assembly comprises a pusher (105); a window (214) extending through the pusher; a first movable contact (106) positioned within the window; and a second movable contact (107) positioned adjacent to said first movable contact within the window. A method of assembling a pusher assembly having a movable contact is also disclosed. The method comprises steps of inserting a first movable contact within a pusher; inserting a second movable contact with the pusher; and retaining the first movable contact and the second movable contact within the pusher by a spring.

Abstract: The present invention is related to a pusher assembly (105) for use with an operator. According to one aspect of the present invention, a pusher assembly generally comprises a body portion (208); first window (216) formed in the body portion; second window (218) formed in the body portion adjacent to the first window, the second window being wider than the first window. According to another aspect of the present invention, a method for assembling a pusher assembly comprises the steps of inserting (602) a movable contact into a first position in a first window; moving (608) the movable contact to a second window; and rotating (610) the movable contact to a second position within the second window.

Abstract: A circuit breaker includes a switching contact arrangement and a drive apparatus which operates it, with the connection between the switching contact arrangement and the drive apparatus being designed such that it is detachable. For this purpose, a contact support of the switching contact arrangement contains a coupling bolt, which produces a hinged connection to a lever arrangement for the drive apparatus. A holding piece allows a actuating shaft of the drive apparatus to be rotated to a position, and to be fixed in this position. This allows the switching contact arrangement to be removed without any problem, and subsequently to be replaced by another switching contact arrangement. Once the control panel for the circuit breaker has been removed, the holding piece can be placed on the actuating shaft and can be attached to a front housing body of the circuit breaker where the control panel would otherwise be located.

Abstract: A switch housing assembly which uses an internal pressure bracket to simultaneously provide pressure against multiple switches located in multiple locations within the switch housing assembly. The pressure bracket creates a fluid seal between the flexible switch buttons and the switch housing by pressing the switches against the switch buttons which in turn are pressed directly against the inner surface of the switch body. Multiple switches are simultaneously secured to the switch housing by an internal bracket which simultaneously provides pressure against the backs of multiple switches. An optional pressure ring focuses pressure from the periphery of the switch assembly to the outer peripheral ring of the flexible switch button. The bracket assembly is preferably secured to the switch housing by a single removable screw to allow disassembly when needed.

Abstract: Magnetic microswitch able to be actuated by a magnetic field, including two strips (1, 2) each including a distal portion (5, 5') whose overlap forms an air gap of distance e, at least one of said strips (1) made of magnetic material having one end (3) attached to the substrate via a foot (9), a median portion (4) and a distal portion (5) of length L.sub.o, said strip being flexible with respect to the second strip (2). The median portion (4) of the flexible strip (1) is formed with a total cross-section less than that of the distal portion (5) so as to have a lesser bending resistance allowing the strip to have both deflection of an amplitude at least equal to e to make contact under the influence of a magnetic field and sufficient return force towards the open position in the absence of a magnetic field.

Abstract: A contact-unit slide for contractors which includes an insulating body in which windows are drilled wherein in each of these windows a contact bridge and a compression spring associated with the contacts are housed, the slide being moved by the mobile parts of the contactor's electromagnet, the spring bearing on the opposite side of the support surface adjacent to the contact bridge. The body has slots extending between a window and a visible surface to allow it to be supported on the upper end of the associated spring.

Abstract: An intelligent circuit breaker or switching device system comprises three separate microprocessor-based units, including a condition monitoring unit (CMU) 40, a breaker control unit (BCU) 50, and a synchronous control unit (SCU) 60. The CMU 40 provides detailed diagnostic information by monitoring key quantities associated with circuit breaker or switching device reliability. On-line analysis performed by the CMU provides information facilitating the performance of maintenance as needed and the identification of impending failures. The BCU 50 is a programmable system having self-diagnostic and remote communications. The BCU replaces the conventional electromechanical control circuits typically employed to control a circuit breaker or switching device. The SCU 60 provides synchronous switching control for both closing and opening the circuit interrupters. The control processes carried out by the SCU reduce system switching transients and interrupter wear.

Abstract: The present invention defines a convertible electrical contact. The convertible contact comprises two pair of movable contacts attached to an actuator which is supported by and enclosed within a housing. The actuator is biased to a first position and is slidably movable to a second position in response to a force applied to the actuator. The movable contacts are attached to the distal ends of a flexible member which is supported at its approximate midpoint by the actuator. The movable contacts are also movable between a first position and a second position as the actuator is moved. A pair of contact cavities are defined by the housing such that the one contact cavity lies on each side of the actuator and the flexible member and movable contacts are contained within the cavities. The housing defines a first pair of access apertures associated with the first position of the movable contacts and a second pair of access apertures associated with the second position of the movable contacts.

Abstract: A contact arrangement for an electromagnetic switching apparatus having parallel offset contact bridges which are held in windows of a contact bridge carrier. These contact bridges are prevented from shifting transversely to the direction of force of a contact pressure spring pushing against a spring cup. The contact bridges are connectable to fixed contact parts. The spring cup is adapted to the offset of the contact bridges and has a separating rib for the contact bridges which extends between the two parallel contact bridges, so that mutual contact of the contact bridges with each other is impossible if diagonally opposite contact parts are welded together when the contacts are opened.

Abstract: In a distributor cap for internal combustion engines, a multi-positionable contact which can be manually rotated to successively present each of a plurality of contact surfaces to the distributor arm after an adjacent contact surface has become pitted, corroded or otherwise worn; thus increasing the useful life of the distributor cap. The contact surfaces are symmetrically arranged about the axis of rotation of the contact. Rotation can be achieved by means of a screwdriver blade introduced through the sparkplug wire terminal to act on a slotted head of the rotating contact exposed at the bottom of the sparkplug wire terminal, or by grasping the contact from underneath.

Abstract: A sub-assembly comprising a contact finger support cage and a connection pad of each pole is securedly united to an intermediate insulating partition of the case by a bracket and screw fixing device. The cage is pivotally mounted on a spindle positioned in bearings of the pad, and is connected to a switching bar by a mechanical link cooperating with a disengageable coupling, capable of breaking the linking system with the bar at the level of each pole. One side wall of the insulating case includes an opening communicating with the compartment housing the separable contacts of each pole. The arc chute is fixedly secured to an insulating support capable of being moved in translation in the longitudinal direction of the pole to ensure either blanking-off of the opening in the inserted position of the arc chute inside the compartment, or removal of the arc chute via said opening allowing the condition of the contacts of each pole to be checked visually, without removing the main fixing screws of the case.

Abstract: An electrical box is provided at the outer end of an electrical power cable of the type that supplies power to aircraft parked at an airport, which enables rapid replacement of damaged switches in a compact and watertight arrangement. The electrical box includes a main connector assembly which has a plurality of conductor socket terminals connected to conductors in the cable, and a switch assembly which includes a plurality of switches. The switch assembly fits into a recess in the main housing, and includes projecting pins connected to the switches and which are received in corresponding conductor socket terminals on the main housing. Not only can switches be easily replaced, but the arrangement avoids the need for a bulky connection box where wires of switches are connected to free lengths of the conductors. The switch assembly includes a circular projection from which the pins project, the circular projection including a sealing ring which seals to a corresponding circular recess in the main housing.

Abstract: A stored energy system of a circuit breaker operating mechanism comprises a telescopic link having a guide and a cap with relative movement between which at least one closing spring is inserted. At the end of charging travel, a removable blocking device can be inserted in orifices of the cap and guide to lock the telescopic link. The release of a recharging cam by unlocking a closing pawl then causes a break in the mechanical link with a drive lever, so as to allow the sub-assembly formed by the telescopic link and the closing spring in the compressed state to be removed.

Abstract: A bell or dome-shaped key member is formed of elastic material insertable into a plastic housing part which serves for fastening the key member to a contact plate. The key member is used for holding an actuation button. The key member is fixed in the plastic housing part via swing members which are of one piece integral construction with the plastic housing part and are attached thereto by film hinges. The swing members grasp the key member at a peripheral web at the contact plate side. In a free condition of the swing members, the key member can be inserted into the plastic housing part in unimpeded fashion. Subsequently, the swing members are moved into their retaining position and the key member is thereby locked in the plastic housing part.

Abstract: An interchangeable switching system for an electrical device includes a trigger, first and second electrical contacts, and first and second interchangeable housings for mountably receiving the trigger and the contacts. The trigger has first and second camming surfaces and the first housing includes structure for mounting the first and second electrical contacts such that inward movement of the trigger causes the first contact to be forced by the first camming surface into electrical contact with the second contact. The second housing includes structure for mounting the first and second contacts in positions in which a predetermined inward movement of the trigger causes the first contact to be forced by the first camming surface into contact with a third electrical contact disposed in this housing between the first and second contacts.

Abstract: A switch for making and breaking a connection between a load circuit and a power line, with two parallelogrammatic linkages terminating in scissorlike contactor pairs, has limitedly swivelable and/or extensible cross-links interconnecting aligned pivotal junctions of the two linkages to provide them with a certain relative mobility. In an operating position, part-cylindrical armatures detachably secured to the two contactor pairs grip respective portions of an elongate countercontact fixedly suspended between a pair of rings attached to the power line, this countercontact comprising a metallic supporting tube also provided with part-cylindrical armatures in the region of the contactor pairs. Each armature may comprise several metallic layers on a base of copper, namely an inner layer of silver, a protective layer of tin on top thereof, and an outer silver layer. The armatures could also be made, at least in part, of a scorchproof material such as silver/cesium oxide.

Abstract: A family of removable switch electrocautery instruments is provided by springably releasably mounting a switch means to an instrument provided with a conductive member adapted to come into contact with living tissue and a handle member. The handle member may be formed of conductive material covered with an insulative layer or the handle member may be comprised of an insulative material. Means are provided on the switch means for making an electrical connection with the conductive member which was adapted to come into contact with the living tissue. Electrical connection between the switch means may be made through one of the springably releasable attachments or it may be made by means of a separate connector element.

Abstract: A replacement electrical brush for an auto horn circuit in which a metal rod has an enlarged head which rides on a slip ring on the underside of the auto's steering wheel. When the original brush head comprising the enlarged head becomes worn and inoperative the replacement brush head of the present invention is slipped over the worn brush head to provide a replacement. The replacement brush head can be a simple metal cap. The invention eliminates the necessity of removing and replacing the entire metal rod.

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: A device for selectively connecting a plurality of circuit elements in a thick/thin film circuit comprising, a pivot pin mounted to the film circuit and a manually rotatable contact element mounted to the pin. Contact fingers emanating from the contact element communicate with contact pads connecting a different set of film circuit elements together each time the contact element is rotated.

Abstract: An electric switch having an insulating housing and at least one opening into said housing from outside thereof, with a user inserted wire terminal insertable into said opening from the outside thereof and lockable coincidentally with such insertion, said wire terminal serving a first function of providing an internal switching contact within the switch and a second function of coupling the switch into an electric circuit.

Abstract: A moveable electrical contact for a direct-current, high-capacity circuit breaker includes a cylindrical contact body provided with a cylindrical borehole arranged eccentrically on the contact body and extending in a longitudinal direction. An inner body can be arranged in the borehole and connected to a drive rod. This arrangement provides an advantage in that, owing to the eccentric arrangement of the borehole, the breaking current formed during opening of the circuit breaker contacts is forced to form a loop whereby a good quenching of the electric arc is achieved. The construction of the moveable contact is also mechanically quite stable.

Abstract: An assembly for retaining electrical conductor end portions within a surrounding housing of an electrically operated device, including a plurality of spaced pin members extending between first and second housing portions, with pairs of the pin members located on opposite sides of conductor end portions located within the housing. The conductor end portions are, in turn, attached to contact terminals which are formed with an end portion located adjacent to the attached conductor having a width appreciably greater than a distance defined by a transverse gap extending between the pin members extending on either side of the conductor end portion, whereby tensional stresses applied to the conductor draw the attached contact terminal into abuting engagement with the pair of pin members, preventing longitudinal withdrawal of the contact between the pin members.

Abstract: An electric control device is provided by this invention with a new and unique pull-out contact combination. This pull-out arrangement allows the contact assembly to be pulled away from the housing of the control device for visual inspection of the contacts without removing electrical conductors terminated there.

Abstract: A keyswitch includes a tubular plunger with a rectangular body slidably mounted in a rectangular housing that has a bottom wall provided in its top with a circular recess receiving the lower end of a coil spring extending up around a pair of upright spring contact strips, the lower ends of which are press fitted in the bottom wall. The inside of the plunger is provided with a cross member that normally separates the upper ends of the contact strips, but permits them to engage each other when a keycap on the upper end of the plunger is pushed down to lower the plunger. The plunger body has legs extending downwardly from its lower corners which engage the area of the housing between the plunger body and bottom wall of the housing while the plunger is in its upper position. The corners of the bottom walls are provided with downwardly extending sockets for receiving the plunger legs when the keycap is depressed.

Abstract: A high current cell-shorting switch is provided with removable bus bar tips having an enlarged beveled area of contact. A plurality of movable tapered bridge contacts are arranged along a main shaft such that upon rotation of the shaft a plurality of the bridge contacts are simultaneously driven into spanning contact with two of the bus bar tips. The main shaft is supported by pairs of split collars which can be easily separated thereby permitting removal of the main shaft and associated contacts. Upon separation, the switch contacts and bus bar tips may be easily removed for refurbishing or replacement.

Abstract: Electromagnetically operated contactor employing contact modules which are converted from normally open to normally closed and from normally closed to normally open operation by inverting the contact module in the contactor. The contact terminals of the contact module are clamped by various arrangements against conductive members of the contactor. Wiring terminals for connecting external wiring to the conductive members are spaced from the arrangement for clamping the contact terminals to the conductive members. Thus, the wiring terminals and the external wiring do not interfere with the module or arrangement for clamping, and the module may be removed, inverted, and replaced without disturbing the external wiring connections.

Abstract: A stationary contact of an electromagnetic contactor having an insulating contact mounting plate is part of a contact combination that includes a contact arm, a retainer and a fastening screw for electrically and mechanically securing the contact combination to a terminal of the contactor. The contact is mounted on the forward end of the arm and the retainer, constructed of spring sheet material, engages the rear of the arm. The front of the arm and the retainer cooperate to form a recess which receives and grips a formation of the mounting plate.

Abstract: A stationary contact of an electromagnetic contactor having an insulating contact mounting plate, is part of a contact combination that includes a contact arm, a retainer and a fastening screw for electrically and mechanically securing the contact combination to a terminal of the contactor. The contact is mounted on the forward end of the arm and the retainer, constructed of spring sheet material, engages the rear of the arm. The front of the arm and the retainer cooperate to form a recess which receives and grips an L-shaped formation of the mounting plate.

Abstract: A relay assembly has a flexible contact blade mounted on a contact carrier through the use of non-conductive support blocks which permit flexing of the blade as it moves with the carrier, thereby causing a wiping action between the movable and stationary contacts within the relay.

Abstract: A rotary wafer switch in which the switch housing is resilient and insulating so that the wafers can be snap-fitted into it and in which the rotatable contact-carriers are provided with apertures through which the contacts in the carriers can be removed if desired after the switch has been assembled.

Abstract: A theft prevention switch device for use in a vehicle with an electrical system selectively operable off one of a plurality of battery sources. In the preferred embodiment, three electrical conducting means are attached to a support plate which can be mounted within a box that can be locked shut. One of the electrical means is connected to the vehicle's electrical system and each of the other two is connected to a battery source. The electrical conducting means are spaced from each other about a common point. A portable and removable plunger can be selectively placed to electrically connect the first electrical conducting means either to the second or the third electrical conducting means. The portable and removable plunger has two substantially planar portions joined at an angle and an insulated, cylindrical gripping member. The first electrical conducting means is spaced from each of the other two about a common common point at an angle corresponding to the angle between the planar portion of the plunger.

Abstract: A relay of rather flat construction has contacts arranged along its narrow sides and is received in a circumscribing frame of the same or smaller height with downwardly projecting terminals extending from contact springs which make contact with the relay contacts. These contact springs are disposed in grooves of the frame and ridges between the grooves hold the frame on the relay body in frictional engagement therewith.This is a continuation in part application of my application Ser. No. 485,322 filed July 3, 1974.

Abstract: An alternating current switch suitable for automatic assembly is provided having an insulating housing including an open top base and a cover to close the base. The base has side openings to expose screw terminals and may have bottom openings to admit wires to push in connectors. The terminals are integral parts of contact arms within the housing. The contact arms as well as a balance spring are held in place in the housing within side wall slots integral with the base of the housing and by bosses integral with the cover. The balance spring and a movable contact arm are shaped to bear against cam portions of a toggle.The cover is provided with bearings to hold the toggle at its trunions in pivoting relation and is provided with a top opening through which the trigger of the toggle extends to the switch exterior.