Abstract: A magnetostriction-based vibration suppression apparatus for a steel pipe of a power transmission tower includes a lantern ring, four spoiler cups, and two control boxes; the lantern ring is fixedly sleeved on the steel pipe; mouths of the spoiler cups face outwards, and bottoms thereof are hinged on the lantern ring; the four spoiler cups are squarely distributed; and the two control boxes are symmetrically and fixedly mounted on the lantern ring; the control boxes are arranged as follows: the spoiler cups are arranged in pairs as a group, and each control box is arranged between two spoiler cups; each control box is provided therein with two groups of inerter units corresponding one-to-one to the spoiler cups. The vortex is avoided using a structure such as a spoiler cup, and the vibration kinetic energy of the steel pipe is consumed, thereby achieving an effective vibration reduction effect.

Abstract: 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.

Abstract: An electromagnetic shield member that includes a pressing mechanism with: a cylinder provided on one of a bottom wall of the groove and an opposing wall of the cover opposing the bottom wall of the groove; a piston provided so as to be capable of reciprocal movement in the cylinder; a spring that is provided in the cylinder, and is configured to bias the piston toward one end of the cylinder; and a piston rod that is coupled to the piston, protrudes from the one end of the cylinder, and has a leading end configured to press the electrical wire.

Abstract: An electromagnetic shield member including: a case including a groove in which an electric wire is to be housed; a cover configured to be attached to the case and cover the groove; and a pressing mechanism that is housed in the groove and configured to press the electric wire, wherein the pressing mechanism has a wall that covers an outer circumferential surface of the electric wire in conjunction with the groove, and a presser provided on the wall and configured to press the electric wire.

Abstract: A speaker assembly may be for being resiliently mounted to spaced apart frame members of a vehicle. The speaker assembly may include an elongate housing having a respective retention chamber at each opposing end, and audio speakers and associated wireless receiver circuitry carried by the housing. The speaker assembly may also include a respective inboard elastomeric body within each retention chamber, and a respective vehicle frame mounting bracket at each end of the elongate housing and to be mounted to an adjacent frame member of the vehicle. The assembly may further include respective fasteners coupling each vehicle frame mounting bracket to the elongate housing via a corresponding inboard elastomeric body so that each vehicle frame mounting bracket is resiliently coupled to the elongate housing.

Abstract: An illustrative example embodiment of an elevator rope sway damping assembly includes a plurality of sway dampers having a width and a length. An actuator device selectively causes movement of the sway dampers in a direction transverse to the length between a first position where the sway dampers are spaced apart by a first distance and a second, sway-damping position where the sway dampers are spaced apart by a second, shorter distance. The actuator device provides an indication when the sway dampers are in the first position.

Abstract: 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.

Abstract: There is provided a vibration suppression device, a machine tool including the device and a vibration suppression method using the device. The vibration suppression device includes a flexible member having a first position F fixed to the structure to be a fixed end of a cantilever and a second position on a free end side; and a weight attached to the flexible member in the second position. The vibration suppression device has an adjustment mechanism for changing a distance between the first position and the second position. Accordingly, it can effectively suppress vibration of a structure, and that can effectively suppress the vibration by easy adjustment when the characteristic of a generated vibration is different.

Abstract: A towing safety device is attached to a tow or winch line to dampen the recoil of a line if connecting hardware fails during towing or pulling. The dampener comprises a reversibly closable opening and may be stored empty and folded in a vehicle when not in use. When filled with weighted matter, such as sand, soil or stones found in the field and attached to the towing hardware and tow line at two points, the towing safety device is deployed to avoid or reduce the likelihood of injury or property damage that can occur with a freely ricocheting line.

Abstract: 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.

Abstract: A method for positioning a conductor for an overhead energy transport, the obtaining of a conductor with an elongate core and an elongate sheath situated around the elongate core. The method comprises the step of fixing the elongate sheath to the elongate core at a position which is not at the ends of the conductor, by means of at least one clamping piece.

Abstract: A support device for supporting a wire includes a first support portion. A second support portion includes a first leg portion and a second leg portion that extends linearly and is attached to the first leg portion and to the first support portion. A third support portion includes a third leg portion having a third inwardly facing surface, which faces towards the third axial opening, and a third outwardly facing surface, which does not face towards the third axial opening. The third inwardly facing surface and the third outwardly facing surface have a different surface roughness. A fourth leg portion has a fourth inwardly facing surface, which faces towards the fourth axial opening, and a fourth outwardly facing surface, which does not face towards the fourth axial opening. The fourth inwardly facing surface and the fourth outwardly facing surface have a same surface roughness.

Abstract: Friction shaft damper includes springy projections pressing against inside surface of a portion of rotor such as drive shaft with spring force. Central mass may be positioned inside surface of drive shaft by projections extending outwardly from central mass and slideably engaging inside surface of drive shaft. Enlarged section or chamber of shaft may surround and axially trap damper. Axially spaced apart sets of springy fingers may position mass inside shaft and radially inner ends of fingers may be secured to mass and radially outer ends of fingers may be positioned and free to slide along inside surface of shaft. Two axially spaced apart annular deflection limiters may be placed around mass with small clearances C between deflection limiters and inside surface of shaft. Damper may be a multi-lobed wave spring having multi-lobed rim attached to mass by struts. Damper may be multi-lobed wave spring with crests.

Abstract: An illustrative example elevator system includes a hoistway that establishes a vertical pathway. The hoistway has an interior border established by a plurality of stationary boundaries that each have a height aligned with a vertical length of the hoistway. Each of the stationary boundaries has a width generally perpendicular to the height. An elevator car is within the hoistway. At least one vertically extending load bearing assembly includes a plurality of elongated load bearing members extending along a vertical path and facilitating movement or support of the elevator car. At least one hoistway liner assembly is situated in the hoistway. The hoistway liner assembly includes a plurality of bumpers that each have an axis that is generally perpendicular to the vertical length of the hoistway. The axes of at least two of the bumpers are non-parallel.

Abstract: Conductor spacer assemblies are disclosed that can be easily and rapidly clamped to parallel electrical conductors suspended between supports, and that can be easily and rapidly secured together with an automatically actuated fastener assembly. The conductor spacer assembly includes an upper spacer body that is coupled to a lower spacer body and an automatically actuated fastener assembly that facilitates quick and safe installation of the conductor spacer assemblies.

Abstract: A wire harness includes an outer member having a tubular shape, at least one conductive path configured to be contained in the outer member and protected by the outer member, and a linear vibration suppressing member configured to suppress shaking of the at least one conductive path by decreasing a play ratio of the at least one conductive path in an inside of at least a prescribed portion of the outer member.

Abstract: A snap-action valve assembly for an exhaust system is provided that includes a first conduit and a second conduit that are joined to together to define an exhaust passageway. A valve flap is disposed within the exhaust passageway for controlling exhaust flow. A shaft supports the valve flap in the exhaust passageway for rotation between open and closed positions. First and second bushings support the shaft. A pad made of wire mesh is attached to the valve flap. The pad includes an end portion that contacts the first or second conduit in the closed position and side wings that contact the first or second conduit in the open position. A resilient tongue may support the pad on an angle relative to the valve flap and a mass damper may be attached to one end of the shaft. These features dampen vibration and reduce valve flap flutter.

Abstract: Provided is an oscillation absorber for a structure, particularly a wind power plant, with a pendulum that is attachable to a component of the structure and a damper for dampening the motion of the pendulum, in which the pendulum passes through a containment ring that limits the deflection of the pendulum, wherein the containment ring is attachable to at least one wall of the structure.

Abstract: Vibration resistant cables containing a first conductor and a second conductor, each having a diameter d, are disclosed. The second conductor is twisted around the first conductor at a lay length between 3 feet and 6 feet to eliminate bagging of the vibration resistant cable during installation.

Abstract: A fastening assembly for a sensor assembly has a metal bush and a fastener. It is possible for the metal bush to be connected via the fastener to a vehicle body. The sensor assembly includes at least one sensor module and an associated sensor assembly. The metal bush has a sleeve as a single-point fixing and a plate as a carrier unit for a carrier plate on which the at least one sensor module is arranged. The sleeve is led through a central through-passage in the carrier plate.

Abstract: An elevator installation includes a shaft in which a first elevator car and a second elevator car arranged below the first elevator car are movable upward and downward in the vertical direction separately from each other. Each elevator car is coupled to a counterweight via a rope or belt arrangement. At least one rope or belt arrangement has two rope or belt sections via which one of the elevator cars is coupled to a counterweight and which extend laterally along the other elevator car. In order to avoid impairment of an elevator car by rope or belt oscillations, the elevator car has at least one limiting member which is held in a predetermined position in the shaft and is assigned to a rope or belt section and has at least one limiting element which is movable between a limiting position and a release position depending on the position of the elevator car which is coupled to the counterweight via the associated rope or belt section.

Abstract: Disclosed is a protector for a clip and line used to suspend aquaculture baskets or like equipment in water. In particular, the protector provides a sacrificial element between the clip and the line that is cheap to manufacture and easy to replace. While an application of the present invention is in oyster cultivation, it could equally well be applied to any process involving the line suspension of an article in water.

Abstract: An asymmetric Stockbridge damper including a clamp and two weights of unequal mass connected to the damper. The damper may further include one or two messenger strands connecting the weights to the clamp. The weights may be situated so that they are an unequal distance from the clamp. The damper may further include a base connected to the clamp, and the weights may be connected to the base. The weights may be bell-shaped. The weights may have smooth contours. The clamp may use a breakaway bolt. The clamp may be designed for high temperature conductor applications. The messenger strands may be made of a 19-strand cable. The messenger strands may be attached to end of the weights and flushed to those ends.

Abstract: A wireless mesh network comprising a plurality of mobile mesh devices coupled as nodes in a mesh network topology is provided herein. Generally speaking, each mobile mesh device may be a portable, self-contained unit, which does not require network or power wiring to communicate network traffic between the nodes. According to one embodiment, the mobile mesh device may include a plurality of dipole antennas, which are enclosed within the mobile mesh device and configured to forward network traffic. At least one of the dipole antennas may be a frequency adjustable end-fed dipole antenna comprising a channel selection pin, which can be adjusted up or down along the dipole axis to change a resonant frequency of the dipole antenna. A method for setting or adjusting a resonant frequency of a frequency adjustable end-fed dipole antenna is also provided herein.

Abstract: The damping device comprises a cluster of resonators with a predetermined frequency distribution, that, when attached to a main or ‘master’ structure, is capable of absorbing irreversibly its vibrational or/and acoustic energy produced by a vibrating body. the density of natural frequencies of the plurality of resonators is comprised within a curve that lies below the envelope curve determined by the formula, e( )=1/?1.

Abstract: A method and apparatus for providing effective damping of first mode vibration for a range of different types of poles is disclosed. According to a preferred embodiment, the apparatus includes a housing having a horizontal floor with an inward curved surface to form an enclosed chamber and at least one damping weight disposed in the inward curved surface and adapted to freely roll inside the enclosed chamber. Preferably, the apparatus is mounted on the top end of a pole for damping wind-induced first, second or higher mode vibration of the poles.

Abstract: A clamp for a spacer-damper includes a first jaw and a second jaw connected to the first jaw. The first jaw has a first clamping surface and a first aperture. The first aperture retains the fastener in an initial position and in a second position spaced latterly from said initial position. The second jaw has a second clamping surface and an open-ended second aperture. The second aperture receives the fastener in the second position. The first jaw may also include a keeper surface for receiving the fastener in an initial position, a keeper pocket for receiving the fastener in a second position and a keeper protrusion is positioned between the keeper surface and the keeper pocket.

Abstract: Embodiments of the disclosure can include a method for reducing or repairing vibration-caused damage in a stator bar, and a dynamoelectric machine resulting therefrom. The method for reducing vibration-caused damage in a stator can include applying, from within a ventilation slot of a stator core, a liquid based vibration-absorbing material onto a side ripple spring, the side ripple spring being in contact with a stator bar and the stator core; and allowing the liquid based vibration-absorbing material to cure, wherein the cured vibration-absorbing material remains in contact with the side ripple spring for absorbing stator vibrations.

Abstract: A pipework brace comprising a first pipework engaging member and a second engaging member. A first tubular strut and a second tubular strut are provided and the first tubular strut is attached to the first and second engaging members by connectors located at each end of the first tubular strut. The second tubular strut is connected to the first and second engaging members by connectors located at each end of the second tubular strut. The connectors each comprise two clamp members that are arranged to allow multi-axis rotation so that each end of the strut may be moved in at least two planes relative to the pipe work engaging members.

Abstract: A window regulator which attenuates vibrations of a wire, which are generated when the door is closed while a window glass is constrained at the top end of the window, to suppress the generation of an abnormal noise. The window regulator includes a carrier plate coupled to a vehicle window glass, a driving unit which lifts and lowers the carrier plate and is disposed below a lower limit of lifting and lowering of the carrier plate, a lifting wire having one end coupled to the carrier plate and another end coupled to the driving unit via a direction-changing member, and a lowering wire having ends coupled to the carrier plate and the driving unit, respectively. An attenuation member is provided on the lifting wire interposed between the direction-changing member and the driving unit and makes contact with the lifting wire to attenuate vibrations when the lifting wire vibrates.

Abstract: An antigalloping device can include first and second clamps, each having a respective jaw for clamping to respective first and second cables. A connecting assembly can be coupled between the first and second clamps. The connecting assembly can include an elongate insulator attached to a flexible tether. The flexible tether is capable of being bent and maneuvered during installation. At least one of the first and second clamps can be rotatably coupled to the connecting assembly. The elongate insulator and the flexible tether can straighten along a longitudinal axis. The at least one of the first and second clamps can be orientatable in a position transverse to the longitudinal axis for being rotatable between the position transverse to the longitudinal axis and a position inline with the longitudinal axis, under opposed tension exerted on the jaws of the first and second clamps, for twisting at least one of the first and second cables for reducing galloping.

Abstract: A vibration resistant cable may be provided. The vibration resistant cable may comprise a first conductor and a second conductor. The first conductor and the second conductor may each have a diameter d. The second conductor may be twisted around the first conductor at a lay length determined as a function of the diameter d and may be configured to reduce relative movement of the first conductor and the second conductor that would result in bags in the vibration resistant cable.

Abstract: An antigalloping device can include first and second clamps, each having a respective jaw for clamping to respective first and second cables. A connecting assembly can be coupled between the first and second clamps. The connecting assembly can include an elongate insulator attached to a flexible tether. The flexible tether is capable of being bent and maneuvered during installation. At least one of the first and second clamps can be rotatably coupled to the connecting assembly. The elongate insulator and the flexible tether can straighten along a longitudinal axis. The at least one of the first and second clamps can be orientatable in a position transverse to the longitudinal axis for being rotatable between the position transverse to the longitudinal axis and a position inline with the longitudinal axis, under opposed tension exerted on the jaws of the first and second clamps, for twisting at least one of the first and second cables for reducing galloping.

Abstract: An antigalloping device can include first and second clamps, each having a respective jaw for clamping to respective first and second cables. A connecting assembly can be coupled between the first and second clamps. The connecting assembly can include an elongate insulator attached to a length of flexible cable. The length of flexible cable is capable of being bent and maneuvered during installation. At least one of the first and second clamps can be rotatably coupled to the connecting assembly. The elongate insulator and the flexible cable can straighten along a longitudinal axis. The at least one of the first and second clamps can be orientatable in a position transverse to the longitudinal axis for being rotatable between the position transverse to the longitudinal axis and a position inline with the longitudinal axis, under opposed tension exerted on the jaws of the first and second clamps, for twisting at least one of the first and second cables for reducing galloping.

Abstract: A damper assembly system that can provide for multiple frequency responses to control Aeolian vibration in EHV (Extra High Voltage) applications is disclosed. The damper assembly comprises an asymmetric design that enables two disparate frequency responses at either side of the clamp that attaches the damper to a suspended member or cable. Two additional frequency responses are enabled at an inlet point of each of the damper weights. The damper weights can have a rounded or egg-shape together with an inner cavity so as to control corona discharge in EHV applications. Additionally, the tuned weights can be of disparate mass as well as asymmetric distances from the clamp.

Abstract: The present invention refers to a device for dynamically neutralizing vibrations in single cable overhead power transmission lines. The device comprises a main body (2) a screw (5) and washer (6) assembly for mounting the main body onto the cable (3) and inertial components (11) consisting of rods (13) projecting in opposite directions from said main body (2) and balance masses (14) positioned at the distal end of said rods, wherein said main body (2) is integrally manufactured and comprises an upper frontal portion to receive an embracing lid (4) that embraces the cable (3) and side portions for mounting matching viscous-elastic components (7).

Abstract: An apparatus for dual acting strain relief is provided. In one embodiment, a strain relief apparatus comprises: a main body having a base member including a first surface and a second surface, and a cone member extending from the first surface of the base member, the cone member including an orifice that penetrates through the main body to the second surface; a primary clamp that secures to the main body and shaped to interface with the base member to form a first set of clamping surfaces where the orifice penetrates the second surface; and a secondary clamp having a tapered cavity therein that penetrates through the secondary clamp and is shaped to receive the cone member. A surface of the tapered cavity and a surface of the cone member form a second set of clamping surfaces. The second set of clamping surfaces provide an electrical path to the chassis.

Abstract: A soft cable boot is snapped on or molded around a cable or cable harness. The cable boot has a three dimensional interlock structure on its circumference via which it interlocks with an interlock teeth profile of a boot clamp. While the boot clamp is mounted and tied down, the interlock teeth profile is pressed into the three dimensional interlock structure and the cable or cable harness is three dimensionally form fitting and elastically fixed, whereby vibration related cable wear is reduced. A boot assembly tool may be used to snap the cable boot onto the cable and/or to inject a sealant into the assembled boot clamp or mold the boot clamp around the cable.

Abstract: The present invention refers to a device for dynamically neutralizing vibrations in single cable overhead power transmission lines.

Abstract: A device for limiting loads on towers that limits loads only in the longitudinal direction and does not affect the manner in which vertical and transverse loads are resisted by the structure. The device incorporates a shield to prevent ice buildup that could affect its operation. It also has optional antifriction bearings to provide a consistent release force independent of the amount of ice that may accumulate on the wires. The device is of simple construction. The device includes an optional energy absorber, such as that used in U.S. Pat. No. 3,211,260 that can provide a resisting force that is within the longitudinal strength of the tower. The device includes both a mechanical fuse and an energy absorbing mechanism that is used to arrest the wire movement. The energy absorber can extend as much as 50 ft to safely absorb the energy released by broken wires with heavy ice coatings.

Abstract: Spacers for use on power distribution lines are disclosed that include a body, a messenger hook, and a conductor hook. A messenger clamp is pivotally connected to the messenger hook, and is rotatable from an open position to a messenger engaging position. A conductor clamp is pivotally connected to the conductor hook, and is rotatable from an open position to a conductor engaging position.

Abstract: An apparatus fixing a power cable to an insulator, which clamps the head of the insulator to fix the power cable to an insulator head, easily and firmly.

Abstract: A damper assembly staking system that provides for staking damper weights onto a messenger is disclosed. The damper assembly includes damper weights having a forked side which accepts a messenger. A hole is drilled in the forked side of the damper weight to receive the messenger. A staking hole is then drilled into the bottom of the damper weights. The staking hole extends just past the side of the messenger hole and is sized to receive a staking ball. Staking of the damper weight is accomplished by pressing the staking ball into the staking hole via a hardened dowel pin to secure the messenger within the damper weights.

Abstract: A vibration resistant cable may be provided. The vibration resistant cable may comprise a first conductor and a second conductor. The second conductor may be twisted around the first conductor at a lay length configured to cause a locking force between the first conductor and the second conductor. The locking force may be configured to prevent relative movement of the first conductor and the second conductor that may result in bags in the vibration resistant cable. The lay length may be predetermined or may vary a predetermined amount per unit of length of the vibration resistant cable. The lay length may be c1d+c2, where d may be the diameter of the first conductor and the second conductor and c1 and c2 may be constants configured to obtain the locking force to eliminate bags in the vibration resistant cable and provide Aeolian vibration dampening in the vibration resistant cable.

Abstract: A clamp for securing an element to a structure comprises, a first part and a second part, engageable into a assembled state about the element to be secured. A flexible element is attached to the first part and the second part, which flexible element allows independent movement of the first part and second part when the clamp is not assembled. The clamp further comprises a tensioning mechanism adapted to hold the flexible element taught when the clamp is in the assembled state.

Abstract: A damper assembly staking system that provides for staking damper weights onto a messenger is disclosed. The damper assembly comprises at least one damper weight with a forked side which accepts a messenger. A hole is drilled in the forked side of the damper weight to receive the messenger. A staking hole is then drilled into the bottom of the damper weights. The staking hole extends just past the side of the messenger hole and is sized to receive a staking ball. Staking of the damper weight is accomplished by pressing the staking ball into the staking hole via a hardened dowel pin to secure the messenger within the damper weights.

Abstract: A spacer and/or spacer damper that provides for uniform spacing of horizontally bundled sub-conductors as well as enhanced heat dissipation is disclosed. More particularly, when applied to electrical transmission lines, the configuration of the spacer and/or spacer damper can include formed-wire outer rods which increase the conductor surface area thereby enhance heat dissipation. In other words, the outer rod assembly disclosed herein can provide for minimizing damaging effects of motion while enhancing heat dissipation of the underlying conductor and connector arm. Still further, the subject spacer or spacer damper can alleviate entangling of the sub-conductors most often caused by galloping, ice unloading, and fault currents.

Abstract: A pole vibration damping means includes an annular housing with internal radial pole encircling chambers in which lead spheres are provided for effecting damping of first mode harmonic vibrations with the assembly being attached to the upper end portion of the pole and operating in conjunction with a pole vibration damping device mounted medially for damping second harmonic mode vibrations.

Abstract: A clamp (40) for attaching a vibration damper to an energized suspended conductor (98) includes a base (42) having a first clamp member (46) with first and second extension sections (50, 52). The clamp (40) further includes a second clamp member (56) positioned between the extension sections (50, 52), and an eyebolt (58) for securing the second clamp member (56), to the first clamp member (46). The extension sections (50, 52) continuously abut the second clamp member (56) to prevent its rotation about the eyebolt (58). During installation, the eyebolt (58) is captured by a hook member (92) of shotgun stick (94) and a single lineman secures the vibration damper to the conductor (98).

Abstract: This invention relates to the design and manufacture of Stockbridge type vibration dampers for overhead power transmission lines. The invention provides a Stockbridge vibration damper comprising a pair of damping weights joined by a stranded steel cable, a clamp attached to the cable at a location intermediate the weights for attachment to an overhead power transmission line. The stranded steel cable comprises two or more layers of wire, wherein at the point of connection of the damping weight to the stranded steel cable one layer of wires is attached to the weight and the remaining layer(s) of wires is/are free to move.