Abstract: The separator element can be coupled releasably with a mesh cable duct and is suitable for dividing the cable-housing space along at least a portion of the duct into a pair of adjacent longitudinal compartments. The separator element is formed by a wire which is bent in a manner such as to be coupled with a mesh of the base of the mesh cable duct and to have a portion which projects into the cable-housing space.

Abstract: A device for fixing a mesh cable tray to a profiled support section having a plurality of apertures formed in a surface for supporting the tray includes an element having a substantially semi-cylindrical engagement portion which can enclose a portion of a wire of the tray and can restrain it against the support surface. A tail plate is provided which can cooperate with the section on the side opposite to the support surface. The tail plate is connected to the support section by a screw connector.

Abstract: A mesh cable tray comprises a series of longitudinal wires and a series of transverse wires connected to one another at nodes to form a grid, in which each transverse wire includes a base portion from which two parallel arms extend transversely relative to the base portion so that each transverse wire is generally U-shaped. The series of longitudinal wires comprises a pair of longitudinal edge wires which are disposed beside free ends of the parallel arms of the U-shaped transverse wires. The tray has protection members arranged in the regions of the nodes at which the longitudinal edge wires and the parallel arms of the U-shaped transverse wires intersect, in order to cover the free ends of the parallel arms.

Abstract: A system for fastening a mesh cable tray on a support section is described, including at least one retaining member for retaining the tray on the section and capable, on the one hand, of engaging a bottom wire of the tray and, on the other hand, of engaging the free edge of a lateral wall, or of penetrating into an aperture provided on a lateral wall of the section and of engaging the contour of said aperture, at the transverse section plane in which the bottom wire is disposed, in such a way as to assume a stable coupling configuration.

Abstract: A mesh cable tray comprises a series of longitudinal wires and a series of transverse wires connected to one another at nodes to form a grid, in which each transverse wire includes a base portion from which two parallel arms extend transversely relative to the base portion so that each transverse wire is generally U-shaped. The series of longitudinal wires comprises a pair of longitudinal edge wires which are disposed beside free ends of the parallel arms of the U-shaped transverse wires. The tray has protection members arranged in the regions of the nodes at which the longitudinal edge wires and the parallel arms of the U-shaped transverse wires intersect, in order to cover the free ends of the parallel arms.

Abstract: A connecting clamp for connecting a pair of end transverse wires of two consecutive mesh cable tray sections comprises a first element and a second element intended to be mounted inside and outside the mesh tray, respectively, so as to clamp the base parts of the two end transverse wires. The first element comprises a first portion which is coupled with the second element to clamp the base parts of the end transverse wires of the two tray sections and a second portion which is perpendicular to the first portion and forms a pair of seats for restraining the vertical parts of the end transverse wires.

Abstract: A device for fixing a mesh cable tray to a profiled support section having a plurality of apertures formed in a surface for supporting the tray is described.

Abstract: The joining member is provided for connecting a first mesh cable tray element to a second, longitudinally adjacent mesh cable tray element and includes: a first plate portion with first apertures formed therein for fixing the first plate portion to vertical arms of transverse wires and/or to side longitudinal wires of the two mesh tray elements; and a second plate portion, substantially perpendicular to the first portion, having second apertures formed therein for fixing the said second plate portion to bottom portions of the transverse wires and/or to bottom longitudinal wires of the two mesh tray elements. In a variant of the invention, the joining member enables a first mesh tray element to be connected to a second, longitudinally adjacent channel-like cable duct element.

Abstract: The joining clamp comprises separate first and second elements, with at least one of these forming seats for receiving a pair of facing end transverse wires of two adjacent sections of mesh cable tray. The clamp also comprises articulation means for articulated connection of the first and second elements in a pre-assembled condition in which these elements are rotatable relative to each other between an open position, in which the pair of facing end transverse wires can be inserted into the respective seats, and a closed position, in which the facing end transverse wires are securely locked in the seats. The clamp further comprises snap-engagement members for securing the first and second elements together upon relative rotation thereof from the open position to the closed position.

Abstract: A solid-state switch is connected in series with a load between the poles of an electrical power supply. It includes an isolated gate bipolar transistor with an emitter connected to the internal ground and connected to the load and a collector connected to one pole of the supply and driving an input of a subtractor the other input of which is connected to receive a set point voltage. The output of the subtractor drives a feedback system connected to the gate of the transistor. The voltage at the gate is then representative of the current in the switch and is applied to interrupter means which sends a turn-off signal if the gate voltage exceeds a (triggering) threshold value. The turn-off signal sends to a switching circuit a turn-off voltage which produces a turn-off bias and disables the feedback circuit.

Abstract: A piece of electrical apparatus, such as a junction box, having a body of insulating material has at least one sleeve to receive and position the screw of a connecting terminal and, projecting into the sleeve, at least one resiliently deformable protuberance, to retain the screw and prevent it from dropping out, the protuberance being formed by means of a thinned down zone of the wall of the sleeve. Further retaining means may be provided comprising one or more ribs projecting into the sleeve and extending longitudinally of the sleeve for a part of the length of the sleeve at the inner end of the sleeve.

Abstract: An acoustic warning device of the type comprising a striker member which is also the movable core member of a control solenoid. A radially polarized permanent magnet is disposed at one end of the solenoid, e.g. opposite a gong therefor, and a spring defines with the permanent magnet a rest position of the core/striker member. The end of the core/striker member proximate to the permanent magnet is limited in its outward displacements within the axial extent of the permanent magnet means. The flux through the solenoid is carried mainly by the core member. The alternating polarization of the core/striker member ends is alternately attracted and repelled by the magnetic flux of the permanent magnet which is the equivalent of an imaginary axially polarized magnet in the passage through the solenoid.

Abstract: In a tool for tightening clamps, of the kind comprising a flexible strip and an apertured head, having a passage in which the end of the flexible strip can be engaged after the strip has been passed around a bunch of articles to be clamped together and through the apertured head, the tool being used to cut-off that portion of the flexible strip of the clamp which projects beyond the apertured head following tightening to a greater or lesser degree of the clamp around the articles, the improvement comprising a displacement member, a trigger and coupling means including a swinging link provided between the displacement member and the trigger and including a sudden release mechanism comprising a cam having a cam surface with two separate stable zones separated from one another by an unstable zone and a cam-follower maintained in contact with the cam surface of the cam, the cam and the cam-follower being relatively movable to swing said cutting lever from a rest position into a working position, one of the cam an