Abstract: A strain release connector for an overhead electrical wire includes a first connector part securable to the overhead electrical wire with a fixed clamping force, and a second connector part cooperable with the first connector part and securable to a service cable with an adjustable clamping force, less than the fixed clamping force. The second connector part has at least one strain adjustment screw for modifying the adjustable clamping force. The adjustable clamping force is set by the at least one strain adjustment screw such that the second connector part is configured to release the service cable upon an application of a predetermined tension force.

Abstract: The invention provides a clamp and trolley system for moveably attaching a power cable, hose or tube (104) of a lifting apparatus to a guiding cable or track, the clamp 100) comprising: a first clamp component (102) having a first engagement surface (106,116) adapted to engage with the power cable, hose or tube (104); and a second clamp component (114) having a second engagement surface (132,133) adapted to engage with the power cable, hose or tube, the second clamp component (114) being pivotally attachable to the first clamp component and rigidly fastenable to it in a range of relative orientations; wherein the first and second engagement surfaces (106,116;132,233) are shaped so as to clamp the power cable, hose or tube (104) between the first (102) and second (114) clamp components as the second clamp component (124) is pivoted towards a more closed orientation.

Abstract: A cable guide or cleat for a cable, comprises, in one embodiment, a pivot mounting, a base section on the mounting and an upper section that, when fastened to the base section, a cylindrical guide with clearance for a cable to be passed through the guide for installation, and an insert piece designed to be inserted when the cable is in its final position, so that the base and upper sections, clamp the cable in place. The clearance allows the cable guide to be used first without the insert, when laying the cable, facilitating the laying of the cable round bends in particular. Then, when the cable is in place, the cleat is released again and the insert put in place, so that when the cleat is fastened the cable is securely clamped. Disclosed systems obviate the need for separate temporary guides that would otherwise need storing.

Abstract: The present invention comprises a collapsible hanger and a method for using the same for supporting, among other things, cables from the ceiling of mines. The collapsible hangers of the present invention allow the cables to fall to the floor when tension, pressure, and/or weight is applied to the hangers, either directly or indirectly.

Abstract: This invention's suspensory fastener for piping is characterized in that the fastener is arranged from the two members of a long band and short band, a coupled state maintaining means, which maintains a state wherein a bolt of a bolt-and-nut set that is provided at a lower end coupling portion of the above-mentioned long band is engaged with an opening with guiding entrance of lower end coupling portion of the above-mentioned short band and the two lower end coupling portions are overlapped with each other, is provided, and coupling and releasing of the coupling of the lower end coupling portion of the above-mentioned long band with the fastener coupling portion of the above-mentioned short band are enabled without separation of the bolt-and-nut set provided at the lower end coupling portion of the above-mentioned long band.

Abstract: A cable end fitting retainer assembly for a vehicle includes a conduit end fitting for connection to a flexible cable. The cable end fitting retainer assembly also includes an end fitting retainer arm extending from the conduit end fitting for retaining a portion of the flexible cable in a predetermined position. The cable end fitting retainer assembly further includes a cable wire support extending from the conduit end fitting and located beneath the end fitting retainer arm to contact the cable.

Abstract: An optomechanical mounting includes an upper set of balls and a lower set of balls that support and secure a sphere containing an optical element. The materials in the mounting have the same or nearly the same coefficient of thermal expansion and the balls provide opposing radial forces so that thermal expansions are compensated, giving the mounting superior thermal stability. Frictional forces on the sphere from the upper and lower set of balls maintain the orientation of the sphere (and the optical element) during operation, but smooth surfaces of the sphere and balls still permit sensitive, precision rotation of sphere for alignment without post-alignment clamping of the sphere.

Abstract: A protective overload device (POD) that absorbs energy and reduces the damage to transmission towers resulting from sudden conductor, shield wire, insulator, or conductor suspension failures is herein disclosed. The POD is positioned between the non-energized end of the insulator and the tower or support structure, or between the energized end of the insulator and the conductor. The POD consists of a top lid, a bottom plate, and a ductile load fuse refill disk. The top lid is slotted at regular intervals to allow for transverse deformation of the individual fingers that hold the bottom plate. The ductile load fuse refill disk consists of a filler material in which a steel cable is embedded. The POD acts as a passive rigid link under normal conditions. In the event of a dynamic shock that could fail a tower or tower arm, the fingers of the top lid will move outward along the sliding plane of the bottom plate until the bottom plate separates from the top lid.

Abstract: A cable suspension clamp is provided comprising a roller capable in use of rotating as a cable is drawn across it, and securing means comprising a length of material having a central locking portion adapted to engage the roller and a pair of helical arms adapted to be intertwined with, and grip, the cable once the cable is in extended position. Using this clamp it is possible to mount a plurality of rollers along the intended path of the cable, draw cable over the rollers, and secure the cable to the rollers without having to remove the rollers as is conventional practice.

Abstract: A suspension device of this invention is used to carry a linear material over a cradle receiver and release the linear material onto the receiver, comprising a suspension means, a release means and an activation means. The suspension means suspends a linear material, the release means releases the linear material and the activation means activates the release means so that the suspended linear material can be released onto the cradle receiver. The device is particularly useful when the receiver is long and/or windingly. A laying apparatus of the invention chiefly comprises such suspension devices and a rail means prepared above a cradle receiver on which the suspension devices are to be movably held.

Abstract: A power cable hanger for a mine including a roof mounted rail, a carriage travelling on the rail, a plurality of open-sided hooks to support a cable spaced at intervals along the path of the rail, an arm on the carriage to pick up and place the cable on the hooks and to retrieve the cable from the hooks and cable means, independent of the power cable to cause the carriage to travel backwards and forwards on the rail.

Abstract: A system for handling cables and the like comprising a guide track (7) beneath which is fixed a plurality of space-apart retaining units (10). A trolley (8) is slidably mounted on the guide track (7) and accommodates a cable (5) which may be fixed at each retaining unit by pulling the trolley (8) along the track (7). By pulling the trolley in the opposite direction, the cable (5) may be released from each retaining unit.

Abstract: A guy yoke for use in a guyed structure terminate two support guys coupled to said structure and to transfer loads entered on said supported guys to anchor means, said guy yokes includes two arms pivotally coupled to an anchor plate at one end and coupled to guy wires at the other end. A spreader arm is coupled to the arms to maintain them in a fixed position for forces transmitted by the guy lines which are below a predetermined level. The spreader arm is coupled to the two arms by shear bolts or pins. When the forces transmitted to the yoke are at or exceed the predetermined level, one or both of the shear bolts or pins is severed permitting the two arms to swing toward each other and thereby add effective length to the guying.

Abstract: A safety disconnect switch for mounting on a utility pole to serve as an anchor at one end of a suspended service entrance cable extending to a remote building, so as to first disconnect the cable and then drop it harmlessly to the ground upon an excessive tension force being applied to the cable by a falling tree or the like. This device includes a movable terminal clamping means or slider that joins the termial ends of the wires of the suspended cable to the bus bars of the incoming power supply lead wires. A detent switch mechanism or means holds the movable terminal clamping means in either a first fixed position or a second cable-released position. The detent switch means also includes a locking means and a trigger means to open the locking means upon a predetermined tension force being exerted on the suspended cable.

Abstract: A shear bolt assembly for a load limiting line support for a post insulator comprising a bolt having a first portion engaged with a saddle of the line support and a collar engaged by a line clamp. The collar is in abutting relation with the bolt and the collar and bolt have aligned axial bores in which a shear pin is secured. The shear pin can be secured in the collar and bolt by an adhesive layer and the shear pin can be brought into electrical contact with the bolt by providing a knurled section at one end which establishes interference fit and mechanical contact between the shear pin and the bolt.

Abstract: This invention relates to an arrangement for suspending lighting fittings and the like along or at traffic-routes and the like, comprising lines carried by standards and intended to carry or support the lighting fittings. The novelty lies in that the standards and the lines form two separate systems, wherein the line system is continuous along the traffic-route and releasably connected to the standard system so that the line system substantially remains in its elevated position even if part of the standard system is removed on e.g. a standard being struck by a vehicle.