Krone Gmbh

Krone Aktiengesellschaft

Klaus-Peter Achtnig

Horst Forberg

Gunter Hegner

Manfred Muller

Wolfgang Radelow

Anneliese Stoewe

Robert Honl

Gunther Hegner

Herrman Herfort

Gerhard Boes

The invention relates to a protective circuit for the protection of the user from overvoltage and overcurrent, in particular for telecommunication installations. Prior art protective circuits comprise a fuse connected into the line connection, and a surge arrester with a heat-sensitive protection device, forming a cross path between the current path of the line connection and the earth conductor, the heat-sensitive protection device disconnecting the cross path in case of excessive power, and connecting it to the earth conductor. In the protective circuit according to the invention, a response of the heat-sensitive protection device (5, 6) will cause disconnection of the cross path of the surge arrester (1, 2) and closing of a short-circuit cross path (7, 8) behind the fuse (3, 4) between the line connection (a, a'; b, b') and the earth conductor (E). The protective circuit can be accommodated in a miniature plug for application in telecommunication installations.

Protective circuit and protective plug for telecommunication

A voltage limiter arrangement, including a voltage limiter including a central connecting lead and outer connecting leads positioned on each side of the central connecting lead. A surge arrester magazine is provided including a surge arrester magazine housing and contacts for connection to leads of the voltage limiter. The surge arrester magazine is provided with an open upper end. A receiving member is provided including a receiving opening for accommodating the voltage limiter, the receiving opening including a bottom wall with openings for each of the central connecting lead and the outer connecting leads. The receiving member includes guide elements for guided insertion of the receiving member into the open end of the arrester magazine for guided connection of the central connected lead and the outer connecting leads with contacts of the surge arrester magazine. The surge arrester magazine open upper end preferably includes an inner wall contour corresponding to the guide means of the receiving member. The receiving member includes an outer wall with openings in communication with the receiving opening. The voltage limiter includes a heat protection element extending through the openings of the outer wall when the voltage limiter is positioned in the receiving opening.

Voltage limiter arrangement with receiving member for connection to a

The invention relates to a protective plug (1) for connector banks (20) of telecommunication and data systems, comprising a housing (2) for receiving protective elements (7, 8, 9) connected to establish an electrical connection to an earth rail (44) and with a disconnector contact (43) to a bifurcated contact (41) or to circuit tracks (10) provided on a plug tongue, resp. The disconnector contact (43) is provided with terminal contacts (53) for incoming and outgoing cable conductors. In order to provide a protective plug (1) which protects against overvoltages and serves as well as a fuse against overcurrents and for which the outside dimensions allow a close-fit construction of several protective plugs (1), the plug tongue (5) is a printed-circuit board (4, 4a) extending into the housing (2). Two housing compartments (21, 22) are formed inside the housing (2). Inside the housing compartments (21,22) on either side of the printed-circuit board (4, 4a), protective elements (7, 8, 9 ) are disposed, which are connected to one another over the circuit tracks (10) and over through-plated terminal positions (A to F).

Protective plug for connector banks of telecommunication and data systems

A multipolar plug has a two-piece plastic housing which partially confines one or more one-piece synthetic plastic inserts each of which has a centrally located retaining section removably engaging the housing and a two-part second section. One part of the second section is confined in the housing, and the other part constitutes one or more prongs which can enter a receptacle to engage their contact members with complementary contact members in the receptacle. Each second section carries two or four discrete strip-shaped contact members which are blanked from sheet metal and have central portions fully embedded in the respective retaining section. Each contact member further includes a second portion which is partially embedded in the first part of the respective second section, and a third portion which is partially embedded in the second part of the respective second section. The contact members are disposed, either singly or in pairs, at the opposite sides of the respective second section.

Multipolar plug

A device comprising a plurality of terminal elements (1) for making a solderless, non-screwed and unstripped connection of one or several wires to each terminal element (1). The terminal elements (1) are constructed either as double-contacts (1a) or as multiple contacts (1b) having transverse webs (3, 4, 5, 6). Each of the webs comprises a contact slot (2) and is oriented at an angle of about 45 degrees to the wire axis and, is disposed in parallel to each other.

Device for making a solderless, non-screwed and unstripped single or

The invention relates to a surge-protected cable joint for telecommunication networks, comprising a joint casing closed at either end and having axial cable inlets, and terminal strips for the cable wires secured in the casing interior. In order to permit connection of an increased number of cable wires without increasing the external dimensions while at the same time obtaining a higher resistance to surge currents, the individual terminal strips are disposed within the joint interior in a plurality of double rows arranged in series and each row is fixedly mounted within a trough, thus resulting in a wiring free from crossover points and in an increased number of connections. The receiving troughs (2, 2a) are bolted together in pairs with their bottoms adjacent each other, and are secured to lateral connecting rails (4). These connecting rails (4) in turn are mechanically and electrically coupled via support rails (6) to one of the end walls of the joint casing (1) and via an earth cable to a connecting bolt (5). Furthermore, surge arrester magazines (8) are detachably secured, e.g. by clamping, on the individual terminal strips.

Surge-protected cable joint

The subject-matter of the invention is a device for electrically clamping or connecting a cable wire in the longitudinal slot of an upright terminal element, the laterally deflectable legs and lugs of which are not supported at their sides, e.g. by a plastic material. The device comprises a plunger (1) adapted to be longitudinally movable within a housing against the action of a coil spring (4) and carrying at its forward end a pressure member (1a). Said pressure member (1a) is disposed to be movable within a sleeve (3) fixed to the housing and has a shape matching the cross-sectional configuration of the terminal element. The projecting sleeve surrounds the outer faces of the components of the terminal element and supports the same laterally during the clamping operation. Furthermore the sleeve (3) comprises a cutting edge (3a) cooperating with a cutting edge formed on the pressure member (1a).

Device for clamping an insulated cable wire to a terminal element

The invention relates to a connector assembly for cables adapted to transmit signals with pulse-code modulation. The connector assembly may be used with an increased number of twin conductors either as a simple connector strip or as a pressure sealed cable termination device in conjunction with a housing member. The assembly offers sufficient electrical shielding and is of small size. To this end the connector assembly comprises a base plate (1) mounting a plurality of metal-shielded plastic housings (20). Each of the plastic housings (20) accommodates a pair of contact pins (24,24') secured in the base plate (1) in a pressure sealed and elecrically insulated manner for a twin conductor or, respectively, an individual cable, and further accommodates solderless, screwless and stripless PLUS-contact elements (13, 14, 15) electrically connected to the contact pins. At the lower surface of the base plate (1) there is provided a shielding (3) for the contact pins (24, 24') and the cable conductors (9a) fixedly connected thereto, the shielding (3) being formed of a plurality of electrically conductive partition walls (3b).

Connector assembly for PCM cables

In this overvoltage arrester device which takes the form of a plug-in-type insulation box (1) comprising a box top (1b) and a box base (1a) and in each case adapted to accomodate a plurality of laterally adjacent overvoltage arresters (4a,4b), the housing or box (1) is assembled from a lower part or base (1a) which is identical for all kinds of application, and one of two types of box tops (1b) depending on the envisaged application, the box tops (1b) being adapted to be plugged or snapped into the box base (1a) and being fitted with knife-switch prongs (2a,2b) and earth bars (3a,3b) of different configuration depending on envisaged application in such a manner as to enable a double row of arresters of different types being accomodated in the box.

Growing community of inventors

Berlin, Germany

Klaus-Peter Achtnig