Abstract: A mechanism for preventing premature opening of a tool having two elongate handles comprising a carrier having a row of teeth at one edge and a spring-affected, pivotable pawl co-operating with the row of teeth. The pawl operates as a bistable rocker swingable by end stops at both ends of the row of teeth from a first lateral position for engagement with the row through an instable middle position into a second engagement-free lateral position. The two ends of the spring affecting the pawl and a pivot pin on which the pawl is mounted lie along one straight line when the pawl passes through the instable middle position.

Abstract: A pair of tongs is on one side of the tool body provided with a rocker arms defining a two-armed lever. The forward arm portion of the rocker arms lies as a stop before die members provided in one of the jaws, and has an abutment edge over which the contact portion but not the affixing portion of a cable shoe inserted into the pair of tongs can pass. The rocker arm, affected by a spring, is with the aid of two actuating elements operated in such a way that in the final phase of a crimping operation the forward arm portion is totally removed from the area of the die members, thus enabling an elongation of the affixing portion of the respective cable shoe when being crimped.

Abstract: A spring-pressure connector for electric conductors having a clamp body and an associated movable spring having a longitudinal axis. A control surface and a control element engageable therewith are disposed on the clamp body and spring to enable the spring to move between a clamping position wherein an electrical conductor is held in place and a non-clamping position wherein an electrical conductor is insertable or removable in response to and simultaneous with sliding movement of the spring along its longitudinal axis relative to the clamp body.

Abstract: A cross connection link with a cross strip and downward projecting push on blades below it for modular terminal blocks with perforated current bars that accept the push on blades. A number of push on blades arrayed in a comb mortise along the cross strip are twisted with their flat planes extending transversely with respect to the row along which they are arrayed.

Abstract: A spring-contact connector for electric conductors, with a contact spring and an activating element that is mounted in such a way that it can rotate. The activating element is a more or less rotationally symmetrical member mounted in such a way that it can rotate between the contact spring and a counterbearing piece. The spring has a recess below a contact web on the free end thereof. A conductor seating is disposed at one side of and along the longitudinal axis of the activating element and is intersected by a transverse slot that accepts the contact web.

Abstract: A hand-operated tool of the pliers type includes a body member in which a rectilinear guiding track for a jaw carrier is provided. One stationary jaw for treating a working piece is arranged at one end of the guiding track and another jaw on the jaw carrier. A handle is pivoted to the body member laterally of the guiding track and is provided with faces for engagement with co-operating faces on the jaw carrier so as to press the jaw carrier and the jaw mounted on it towards the stationary jaw when the handle is activated.

Abstract: A cutting connector with two contact knives on its contact part that cut through the insulation on an electric conductor grasped between them to establish electric contact. A U-shaped bent piece pivots on one contact knife surrounding the contact knives above and below to a greater or lesser extent in accordance with how far it is pivoted and having two take-along openings through which the insulated conductor is inserted. The activating member and its motion require very little space. One of the contact knives itself is employed as a pivot for the activating member.

Abstract: A connector for clamping one or more electrical conductors has a shackle which cooperates with a screw serving to urge one end portion of a rail toward a bottom wall of the shackle. The bottom wall has a central portion flanked by two convergent lateral portions which guide one or more conductors against the internal surface of the central portion when the screw causes the end portion of the rail to approach the bottom wall. The underside of the end portion of the rail has a centrally located platform whose underside urges the conductor or conductors against the central portion of the bottom wall and which is assisted by two ridges disposed between pairs of recesses in the end portion of the rail. The lateral portions of the bottom wall have notches which receive portions of the platform, and the recesses receive portions of the corresponding lateral wall portions.

Abstract: In a pliers-type tool having a stationary first handle and a second handle pivotally movable relative to the first handle, a slidable jaw carrier is movable along a rectilinear guiding track in a body member due to the pivotal movement of the second handle. The first handle is fixed to the body member. The second handle is in engagement with a toggle mechanism including a driver arm which, in turn, is pivotally attached at a stationary location to the body member. When the second handle is pivoted, the driver arm contacts, in a gliding manner, the jaw carrier and moves it rectilinearly in the guiding track. The driver arm extends transversely of the rectilinear guiding direction of the guiding track. Forces acting through the driver arm in the direction transversely of the rectilinear direction of the guiding track are prevented from affecting the movement of the jaw carrier. The second handle can be connected to the first handle by a connecting link.

Abstract: A tool for removing insulation from electrical conductors includes an apparatus body, a knife head defining a separate unit and attachable to the body, and a support for a treated conductor located at one end of the head. At least one insulation-cutting knife is arranged in the support and a holder stirrup is provided to press the cable against the support and the knife or knives.

Abstract: Apparatus for separating individual conductor elements in a multiple-conductor flat ribbon cable including a rotatable cutting element for cutting the insulating sheathing of the cable along each of the score lines running between the individual conductor cores. The cutting element is provided with a plurality of protruding arcuate cutting edges each interrupted by a shorter indrawn non-cutting edge. Further provided is a cable support element adapted to press a cable inserted into the apparatus against the cutting edges, but not against the indrawn edges. When the indrawn edges face the cable support element, a feed-in and feed-out gap is provided for easy insertion and removal of the cable.

Abstract: Apparatus for stripping insulation from electrical conductors which have a circular cross-section includes a stationary stand on which a circular base plate is rotatably mounted. An elongated support unit for the conductor to be stripped is secured to and extends outwardly from the base plate. One or more insulation cutting knives are slidably or pivotally mounted on a mounting member which rotates together with the circular base plate. The number of knives depends on the type of conductor being stripped. Each knife is provided with an actuating device. The actuating device may be stationary or it may rotate at a rate slower than the rate at which the circular base plate rotates so that the associated knife gradually penetrates into and cuts the insulation layer on the conductor so that it can be stripped.

Abstract: A tool for removing insulation from cables includes a handle, a housing rotatably mounted in the handle, and a cutting blade mounted in and projecting out of the housing. A recess is formed in the surface of the housing from which the cutting blade projects. A holder stirrup positioned in the handle, holds the cable in position against the cutting blade.

Abstract: A clamp with a housing, a contact rail and a slide having clamping jaws flanking the contact rail and an interconnecting fastener, for effecting electrical connections between spaced-apart conductors, has a guide member interposed between the housing and slide. The guide member is mounted to one of the clamping jaws and has an elongated surface in slidable engagement with a surface of the housing, a leg contacting the clamping jaws for force transmission and prevention of relative rotation of the clamping jaws, a shoulder contacting said one clamping jaw also for force transmission, a recess for receiving said one clamping jaw defined by the leg and shoulder, and releasable locking engagement means for securing the slide in a neutral position independent of the action of the fastener.

Abstract: A cross connection link which can establish several electrical connections between an elongated strip-shaped conductor and one or more bus bars in the recess of a terminal block has a series of neighboring L-shaped or U-shaped metallic distancing elements each of which has a leg connected with an edge portion of the strip-shaped conductor by a weakened joint so that it can be readily broken off the strip-shaped conductor, and a web which is integral with the other end portion of the leg and has an aperture for the shank of a screw serving to connect the web with a bus bar. The heads of the screws are adjacent to those sides of the webs which face the strip-shaped conductor, and such heads are confined against movement away from the regions of the respective webs so that they are always ready for engagement by the working end of a tool which is used to move the shanks of selected screws or all screws into mesh with tapped holes in the bus bar or bars.

Abstract: An electrical connector block comprising plug and/or socket units mechanically coupled together side by side. Each unit has an insulating housing of rectangular cross section. One pair of opposite sides has a dovetail tongue and groove perpendicular to the plugging direction, and the other pair has a dovetail tongue and groove parallel to the said direction. This construction prevents coupled units from being pulled apart when plug and socket blocks are plugged or unplugged.

Abstract: A screwless electrical terminal comprises a connector bar and a clamping cage embracing the bar and biassed by a spring to clamp a conductor between the bar and the cage bottom. The cage can be latched open for example by teeth on the rear of the cage engaging recesses on the connector bar, to allow insertion of a conductor. The cage has a forwardly and downwardly projecting pivot element which engages a fixed abutment if traction on the conductor causes the cage to move along the connector bar. Such movement brings the pivot element into engagement with its abutment and thereafter causes the cage to tilt so as to increase the conductor-clamping force in response to traction on the conductor.

Abstract: An electrical plug and socket connector comprises a multi-pole plug assembly and a multi-pole socket assembly each composed of a plurality of plug and socket units, respectively. Each individual unit has two receptacles to receive pins which, depending on their arrangement in the receptacles of the individual units, serve as latching pins to hold the plug and socket assemblies together, or as coding pins to prevent incorrect connections. Any desired pattern of latching pins and coding pins in any desired number of plug and socket units can easily be provided by assembly of individual plug and socket units and pins.

Abstract: Wire-stripping pliers have outer clamping jaws and inner longitudinally movable stripping jaws. The stripping jaws are retracted, and the movable blade of a wire cutter is moved, by a pulling member in response to closure of the pliers handles. This movement is produced by a driving arm which moves along a cam surface on an extension of the pivoted clamping jaw, thereby pushing back the pulling member. The cam surface has a first portion of shallow inclination to provide rapid movement of the stripping jaws at low force, followed by a surface portion of steep inclination providing for relatively high cutting forces as the wire cutting blades close.

Abstract: A hand tool for stripping insulation from the end of a wire includes a pair of gripping jaws for holding the wire and a pair of cutting and stripping jaws for removing the insulation. An actuating member is pivotally connected at one end to the cutting and stripping jaws and at the other end to a pivotally mounted driving member. When a pair of handles on the tools are pressed toward one another, the two pair of jaws engage the wire, one pair holding the wire while the other pair cuts and strips the insulation. During this operation, the actuating member displaces the cutting and stripping jaws away from the gripping jaws and pulls the cut insulation at least partly off the end of the wire.