Abstract: The invention relates to a drive train for a displaceable contact (1) on a breaker contact arrangement in an electrical power breaker, whereby a coupling element (3), displaceable against a stop (12) and arranged between the moveable contact (1) and corresponding drive element (8), is provided with an anti-bounce device, comprising a catch element (13) and a counter piece (14). The catch element (13) which may be swung into a catch position as a result of the inertia exerted on the centre of gravity (16) thereof, when the coupling element (3) strikes the stop (12), comprises a working surface (22) extending in the pivoting direction (23) to form a momentary working connection with the counter piece (14). A retaining spring (32) is additionally provided on the catch element (13) to guarantee that a rebounding of the coupling element (3) into the position corresponding to the closed state of the breaker contact arrangement does not occur.

Abstract: A current measuring device for a multi-pole voltage circuit breaker includes a support body with a through opening for a current conductor for each of the poles and a receiving chamber, surrounding the through opening for secondary components of current sensors and/or current transformers. The support body is essentially plate-like and rectangular and forms part of the rear wall of the circuit breaker. Should Rogowski coils be used as secondary components of a transformer, then adjustable voltage dividers are also mounted on the support body for interdependent adjustment. The multi-pole current measuring device simplifies the production of circuit breakers as approved components.

Abstract: The invention concerns a structural component made of hard material for a wristwatch, characterized in that it includes a hole fitted with an inner threading which is integral with said component, said threading being directly obtained by injection and thus without removing any material of said component for example by machining.

Abstract: A switching arrangement for low-voltage circuit breakers with a high nominal current, comprising moveable switching contacts (2,3) arranged essentially on a moveable contact carrier (1), fixed switching contacts and a device for cooling, de-ionizing and extinguishing an electric switching arc (7, 11). The fixed contact is provided with a pre-contact function over the entire contact width thereof. Moveable contact levers (2,3) are arranged according to a set pattern in a distributed manner over the entire width of the contact carriers and are provided with or without a pre-contact (5). A contact lever (2) with a pre-contact (5) and a contact lever (3) without a pre-contact can be provided successively. Similarly, two or more contact levers (2) with a pre-contact (5), and two or more contact levers (3) without a pre-contact can be successively and alternatingly provided in packet-form.

Abstract: The invention relates to a switching contact, wherein a rocker-type leaf spring is used as a contact force spring (8) in order to produce the contact force required for a contact lever (2), the drag bearing (10) thereof being disposed between the point of rotation (11) of the contact lever (2) on a contact carrier (1) and a contact-making end piece (18) of the contact lever (2). Preferably, the drag bearing (10) is formed by a bend of the contact force spring (8) and a sliding surface (19) disposed on the contact carrier (1). The drag bearing (10) of the contact force spring (8) can be displaced without a fixed link along the sliding surface (19) according to the tension of the contact force spring (8). If the switching contact arrangement has several contact levers (multiple contact arrangement) all of the associated contact force springs can be combined to form a one-piece leaf spring (23).

Abstract: A low-voltage power circuit breaker includes a current-limiting opening of a mobile switching contact. The force-transmitting connection between the actuating shaft lever and the mobile switching contact or the contact support is provided in the form of a latching device and includes two identical levers, which can pivot in relation to one another around an articulated joint and which are joined to one another by way of the articulated joint that is formed by a joint pin guided through aligned continuous borings provided in concentric parts of the levers. The contact surfaces of the levers have slanted surfaces that serve as a tooth. In the vicinity of the articulated joint, the levers are subjected to the action of an adjustable spring force, which is exerted by a pressure spring and which acts upon the tooth.

Abstract: An arc extinguisher for low voltage switchgear, switching in air, includes a universally applicable variable attachment for adjustment of the arc extinguisher chamber to meet increased demands. The attachment is in the form of a chimney-like arc extinguisher chamber extension, for increasing the volume of the arc extinguisher chamber. It represents a moulded piece with a lower outline which exactly matches the outline of the arc extinguisher chamber cover, normally located on the arc extinguisher chamber and with an upper outline, identical to the upper outline of the switchgear housing for mounting the arc extinguisher chamber cover. Any number of attachments may be used in a stacked manner.

Abstract: A switching contact arrangement for a low-voltage power circuit breaker includes a switching contact arrangement with a stationary contact group and a movable contact group which interacts with it. The contact groups include interacting main contacts, as well as interacting intermediate contacts and consumable contacts. Furthermore, both contact groups are equipped with an arcing horn for passing a switching arc to an arc quenching chamber. The consumable contacts are integrated in the arcing horns. Only the main contacts are in the form of contact facings, while the other contact points are formed by the busbars or arcing horns. The switching contact arrangement is of a single design and achieves a longer mechanical and electrical life. Furthermore, particularly short switching times are achieved.

Abstract: Switch cabinet with a rack that can be closed or is closed by means of at least one double-walled cabinet door, two side walls, a back wall and a top wall, where the side walls and the back wall in each case consist of an internal wall and an external wall and are attached to the rack and where a cover hood is placed on the top wall, said cover hood being hinged in the vicinity of the back wall, and can be made fast in the vicinity of the cabinet door in the closed position. By means of a special angling-off of the internal walls and external walls of the side walls and the back wall which are constructed as double walls, a simple and reliable attachment of the external walls is made possible.

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 structural component made of hard material for a wristwatch, characterised in that it includes a hole fitted with an inner threading which is integral with said component, said threading being directly obtained by injection and thus without removing any material of said component for example by machining.

Abstract: The wristband with links (2, 3, 4) includes a plurality of bars (5) acting as means for linking and articulating the links with each other and means for holding said bars in said links. Each bar is held axially by at least one of its ends (13) on to a link (2) by means of a collared sleeve (6) designed and arranged to abut against holding means (7, 8) carried both by the bar and the link.

Abstract: The invention relates to a connector for conductor bars, which are in-line or extend at a right angle with regard to one another and which rotate 90° around their longitudinal axes. The inventive connector is preferably provided for connecting switchgears with contact-side conductor bars in switchgear stations. Said connector is comprised of a first contact piece (17) and of a second contact piece (18) of which the first contact piece (17) is fastened in an eccentric manner, with regard to the longitudinal axis (L1) thereof, to the second contact piece (18) at a position on the second contact piece (18) that is also positioned in an eccentric manner with regard to the longitudinal axis (L2).

Abstract: The invention relates to connecting bars (4) made from profiled semifinished products and having a cavity, said bars having the same outer dimensions for different nominal currents and being intended for connecting the electrical components of electrical devices and apparatus to an external electrical circuit, wherein the connecting bars extend through the window opening located in the wall of the devices or apparatus and are fixed in the housing by fixing means consisting of two or more partial parts (11, 12) embodied as profiles, which are configured in such a way that they can be connected to one another by positive fit or otherwise to a hollow connecting bar (4). The partial parts (11, 12) have one or several legs (13; 16; 17), the length of which defines the height of the connecting bar (4).

Abstract: A connector rail includes a full profile which is provided with first bearing surfaces and second bearing surfaces which are used to provide support in the window opening of the rear wall of the housing. The second bearing surfaces are provided with projections for securing continuous current conductors which are aligned in a parallel manner and which are, for instance in the case of low voltage circuit breakers, embodied as male contacts for fixed contacts. Respectively corresponding projections are provided in order to secure the flexible cables to the moveable switching contacts or to secure the fixed switching contacts.

Abstract: An arc quenching device for an air-switching low-voltage switching device includes quenching plates, which are arranged between and attached to parallel insulating walls, as well as a cover. A separate cooling device may be introduced into the space between the quenching plates and the cover. The cooling device is in the form of an insert cartridge and contains deionization technology for switching gases. Attachment pins on the cooling device and corresponding holding openings on the inside of the cover make it possible to fit the cooling device to the cover before this cover engages with the insulating walls.

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 structural component made of hard material for a wristwatch, characterized in that it includes a hole fitted with an inner threading which is integral with said component, said threading being directly obtained by injection and thus without removing any material of said component for example by machining.

Abstract: The invention concerns a structural component made of hard material for a wristwatch, characterised in that it includes a hole fitted with an inner threading which is integral with said component, said threading being directly obtained by injection and thus without removing any material of said component for example by machining.

Abstract: A switchgear, for low-voltage switching units with a linearly-displaceable contact support, includes a case-like housing with guide grooves, running in the direction of travel of the contact support, in the housing side walls thereof. Suitable projections on the side of the contact support, engage in the grooves, whereby the linear travel of the contact support is achieved. Pivoting contacts are arranged on the contact support as displaceable switch contacts.