The present invention can provide a twisting antigalloping device for securing to a span of a cable for torsionally twisting the cable, and includes a grip or clamp portion having a grip or clamp axis for gripping or clamping to the cable along the clamp axis. A variable weight portion can be connected to the clamp portion and extend along a variable weight axis offset from the clamp axis. The variable weight portion can include an elongate member with a plurality of individual weights secured on the elongate member. The number of individual weights in the variable weight portion can be a whole number chosen to approximate a calculated value for the number of individual weights N.sub.c given by the equation N.sub.c=Function (K, Θ, W.sub.ND, W.sub.SW) where K is an estimated mid-span stiffness of the span of the cable, Θ is a desired torsional twist angle to be applied to the cable, W.sub.ND is a nominal weight of the antigalloping device without the individual weights of the variable weight portion, and W.sub.SW is a weight of a single individual weight, the chosen number of individual weights for providing the antigalloping device with a total weight W.sub.T for applying the desired torsional twist angle Θ on the cable.

The present invention can provide a twisting antigalloping device for securing to a span of a cable for torsionally twisting the cable, and includes a grip or clamp portion having a grip or clamp axis for gripping or clamping to the cable along the clamp axis. A variable weight portion can be connected to the clamp portion and extend along a variable weight axis offset from the clamp axis. The variable weight portion can include an elongate member with a plurality of individual weights secured on the elongate member. The number of individual weights in the variable weight portion can be a whole number chosen to approximate a calculated value for the number of individual weights N.sub.c given by the equation N.sub.c=Function (K, Θ, W.sub.ND, W.sub.SW) where K is an estimated mid-span stiffness of the span of the cable, Θ is a desired torsional twist angle to be applied to the cable, W.sub.ND is a nominal weight of the antigalloping device without the individual weights of the variable weight portion, and W.sub.SW is a weight of a single individual weight, the chosen number of individual weights for providing the antigalloping device with a total weight W.sub.T for applying the desired torsional twist angle Θ on the cable.

A drone is for installing an object on a power line. The drone has a connection means for connecting the drone to the object, so that the drone may carry the object. A first engagement member is for engaging a second engagement member on the object. A power source is for operating the first engagement member so as to actuate a locking means on the object, via the second engagement member, for securely locking the object to the power line. The drone further has a device for limiting one or more degrees of freedom of the object relative to the power line before engaging the locking means.

A drone is for installing an object on a power line. The drone has a connection means for connecting the drone to the object, so that the drone may carry the object. A first engagement member is for engaging a second engagement member on the object. A power source is for operating the first engagement member so as to actuate a locking means on the object, via the second engagement member, for securely locking the object to the power line. The drone further has a device for limiting one or more degrees of freedom of the object relative to the power line before engaging the locking means.

Stockbridge dampers are provided. A Stockbridge damper includes a first clamp, and a second clamp spaced along a longitudinal axis from the first clamp, wherein a distance is defined along the longitudinal axis between the first clamp and the second clamp. A Stockbridge damper further includes a wire strand extending generally along the longitudinal axis through and between the first clamp and the second clamp, the wire strand including a first end portion extending from a distal side of the first clamp, a second end portion extending from a distal side of the second clamp, and an intermediate portion extending between proximal sides of the first and second clamps. A Stockbridge damper further includes a first weight connected to the first end portion of the wire strand, and a second weight connected to the second end portion of the wire strand.

Damper clamps that can be mounted and secured to utility conductors from remote locations are provided. The damper clamps are configured to be installed from remote locations, such as the ground, by an individual lineman using an extendable reach tool. Initially, the damper clamp is set in an open position where a conductor can be positioned within a seat of the damper clamp and then the damper clamp can be activated so that a keeper is biased toward the seat to temporarily hold the conductor within the seat. The keeper is then tightened to releasably secured to the conductor to the damper clamp.

Damper clamps that can be mounted and secured to utility conductors from remote locations are provided. The damper clamps are configured to be installed from remote locations, such as the ground, by an individual lineman using an extendable reach tool. Initially, the damper clamp is set in an open position where a conductor can be positioned within a seat of the damper clamp and then the damper clamp can be activated so that a keeper is biased toward the seat to temporarily hold the conductor within the seat. The keeper is then tightened to releasably secured to the conductor to the damper clamp.

An apparatus (100) for damping vibrations in electrical lines (10) through which modulated currents flow has at least one sound or vibration sensor (102) oriented towards the line (10) or attached to the line, at least one actuator (104) connected to the line, and a control circuit (200) which is supplied, via respective signal lines (108), with signals generated by the at least one sound or vibration sensor (102) that represent sound or vibrations. The control circuit controls the at least one actuator (104) via respective control lines (110) such that this actuator counteracts the vibration of the line (10).

An apparatus (100) for damping vibrations in electrical lines (10) through which modulated currents flow has at least one sound or vibration sensor (102) oriented towards the line (10) or attached to the line, at least one actuator (104) connected to the line, and a control circuit (200) which is supplied, via respective signal lines (108), with signals generated by the at least one sound or vibration sensor (102) that represent sound or vibrations. The control circuit controls the at least one actuator (104) via respective control lines (110) such that this actuator counteracts the vibration of the line (10).

A device to be attached to an overhead power line for the purpose of manipulating movement of the overhead power line comprises an electric power source; a base, defining a base plane; and a clamp, secured to the base, to be attached to a section of the overhead power line. The device further comprises a flywheel, having a rotational axis; an actuator, arranged to adjust the rotational axis of the flywheel in dependency of an actuator control signal; and an electric motor, arranged to rotate the flywheel about the rotational axis in dependency of a motor control signal. The device further comprises an acceleration sensing device, secured to the base, providing an acceleration signal; and a controller device, arranged to receive the acceleration signal and to provide the motor control signal and the actuator control signal. The controller device is configured to operate in an overhead power line stabilizing mode. In the overhead power stabilizing mode, the controller device calculates the motor control signal and the actuator control signal in dependency of the acceleration signal in such a way as to minimize the acceleration signal. Advantageously, the controller device is also configured to operate in in an ice removal mode. In the ice removal mode, the controller device calculates the motor control signal and the actuator control signal in dependency of the acceleration signal in such a way as to cause fluctuations in the acceleration measured by the acceleration sensing device.