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: 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: An overhead cable is provided that comprises a tension-bearing core of twisted steel strands, a conductive layer of aluminum strands arranged at the outer circumference of the twisted steel strands, and an outermost layer arranged at the outer circumference of the aluminum strands. The outermost layer is formed by twisting together a plurality of adjoining segment strands. A spiral groove is provided in the longitudinal direction along the boundary portion of the outer circumferential surface of each adjoining segment strand. Along the contour of a cross-section of this outermost layer, each groove comprises an arc-shaped curve having a radius R centered around a vertex of a regular polygon. Each part between adjoining grooves comprises an arc-shaped curve which is concave with respect to a straight line connecting adjoining of a regular polygon, intersecting the arc-shaped curve with radius R.

Abstract: Fluid current induced vibrations, as well as vortex shedding vibrations induced in a cable stay or a similar elongated, cylindrical element are dampened and substantially eliminated by applying a plurality of flexible active or passive damper bands to the cable at spaced intervals. In underwater currents, the damper bands force or channel the fluid flow over a circular cross-sectional shape, which inhibits lift, and therefore damps the cable stay oscillations. These damper bands can be retrofit to existing cables or can be installed on new cables. Each damper band may include a shiftable mass and an energizing device for facilitating assisted shifting of the mass. A control assembly can actuate all or selected ones of the energizing devices in response to sensed magnitudes of cable stay vibration.

Abstract: An energy absorbing seismic brace for both retrofit and new construction. The brace comprises a central strut of either multi-legged or homogeneous section fabricated from low strength aluminum, whose characteristics maximize the seismic energy absorption for a building installation. This central strut absorbs energy at high weight-specific levels by virtue of the hysteresis in its load-deflection relationship. In order to eliminate the possibility of buckling of the energy absorbing strut when it passes through the compression portion of a load cycle, it is surrounded by a system of spacers and an external sleeve providing very high bending rigidity at low weight. The spacers may be fabricated from low-density foams, pseudo-concrete, fibrous composites, or metals, depending upon the application. The outer sleeve may also be fabricated from a variety of materials, depending upon whether the embodiment calls for the principal bending rigidity to be provided by the spacers or sleeve.

Abstract: An energy absorbing seismic brace for both retrofit and new construction. The brace comprises a central strut of either multi-legged or homogeneous section fabricated from low strength aluminum, whose characteristics maximize the seismic energy absorption for a building installation. This central strut absorbs energy at high weight-specific levels by virtue of the hysteresis in its load-deflection relationship. In order to eliminate the possibility of buckling of the energy absorbing strut when it passes through the compression portion of a load cycle, it is surrounded by a system of spacers and an external sleeve providing very high bending rigidity at low weight. The spacers may be fabricated from low-density foams, pseudo-concrete, fibrous composites, or metals, depending upon the application. The outer sleeve may also be fabricated from a variety of materials, depending upon whether the embodiment calls for the principal bending rigidity to be provided by the spacers or sleeve.

Abstract: An aerial conductor suspension clamp includes a housing, two split PTFE sleeves and a restraining sleeve. The restraining sleeve is bonded to the conductor and is placed within the housing between the split sleeves. The clamp permits rotation of the conductor while restraining longitudinal movement of the conductor within the clamp.

Abstract: A damper for absorbing vibrations in an overhead cable which has a support member attached to the cable and at least one dampening member pivotally connected to an axial member mounted on a support axis extending substantially horizontally under the cable. Each dampening member has an arm provided with a weight and having an end effecting the connection to the axial member. Both the axial member and the end of the dampening member have cooperating pairs of stops limiting the pivotal movement of the dampening member around the support axis. Between the corresponding stops of the axial member and end of the dampening member are provided resilient cylinders further limiting the pivoting of the dampening member in a resilient manner.

Abstract: The present invention relates to a combined cable suspension device and cable carriage. To enable a cable suspension device (1) to be used also as a cable carriage, the suspension device has been provided with a rotatable cable support (2) which can be moved upwards in the device providing a rotatable support for the cable when the cable is moved out of contact with the cable abutment surfaces (3) in the suspension device. This type of device that incorporates a cable carriage facility enables a cable to be drawn and secured and released as required.

Abstract: A system for the mitigation of cable stay vibrations, typically induced by wind and rain, utilizes a plurality of active damper bands positioned along the cable stay. Each damper band includes a shiftable mass and an energizing device for facilitating assisted shifting of the mass. A control assembly can actuate all or selected ones of the energizing devices in response to sensed magnitudes of cable stay vibration.

Abstract: Vibration absorbers are provided which utilize a torsional spring and a dynamic mass to control vibrations that occur within the structure to which they are attached. Additionally, pipeline systems are provided which utilize such vibration absorbers including a mass and a torsional spring to control the vibrations that occur within the pipeline system. In various embodiments of the present invention, the torsional spring is one or more elastomer elements coupled between the dynamic mass and a support frame to produce a spring force responsive to pivotal rotation of the dynamic mass relative to the support frame. In various embodiments, one or more elastomer elements arranged in series or in parallel may be used as the torsional spring to provide a desired vibratory dampening characteristic for applications, such as pipelines. Use of such torsional springs may provide a more simplified design with less mechanical joints which may be less susceptible to failure in harsh environments.

Abstract: Wind/rain induced vibrations, as well as vortex shedding vibrations induced in a cable stay or a similar elongated, cylindrical element are dampened and substantially eliminated by applying a plurality of flexible damper bands to the cable at spaced intervals. The damper bands break up the formation of rivulets of water at lower wind speeds. These damper bands can be retrofit to existing cables or can be installed on new cables.

Abstract: A galloping control rod for suppressing the vertical, torsional and horizontal movement associated with the galloping affect on aerial cables due to freezing rain, wet snow or frost deposits. The anti-galloping rod includes a non-conductive rod having a preformed helical midsection and a first and second end, the first end including a helical gripping section. The second end includes a one-half helical turn with a differing pitch length than the preformed helical midsection such that the conductor galloping control device can be installed on an aerial cable without having to slide the device along the cable or without the installer having to move his lifting device, such as a bucket lift, along the cable line.

Abstract: A vibration resistant overhead electrical cable is provided, such as a high-voltage transmission line, which has an insulated conductor, the insulation of which has an axially continuously rotating oval or elliptical outer periphery such that the aerodynamic forces acting on the cable act in a continuously changing direction, thereby reducing the tendency of the cable to vibrate. The ratio of the major to minor axis of the oval or elliptical shape is preferably between 1.1 and 1.2 and the length between axial rotations along the longitudinal axis of the cable is usually between about 2.5 and 3.5 meters.

Abstract: An overhead cable includes an outermost surface formed by twisting together a plurality of segment strands. A plurality of spiral grooves form recesses having substantially rectangular cross-sections and are provided at intervals in a circumferential direction of either the outer surface of the segment strands or the outer surface regions of boundary portions where twisted segment strands adjoin each other. Thin segment strands and at least one thick segment strand form the outermost layer. A recessed portion is provided at one side surface among two surfaces of the segment strands forming the outermost layer, a projecting portion is provided at the other side surface, and the strands are twisted together so that the recessed portions and the projecting portions mate.

Abstract: An overhead power transmission line formed by stranding at least one outwardly projecting strand at the outermost layer of an overhead power transmission line formed by a plurality of strands. At least the outwardly projecting portion of the outwardly projecting strand is composed of an organic material. The outwardly projecting strand has a projection height H within a range defined as 1.5 mm≦H≦7.0 mm. By setting the projection height H of the outwardly projecting strand equal to or larger than 1.5 mm, the wind noise characteristic can be conspicuously improved. Further, by setting H≦7.0 mm, the outwardly projecting strand comprised by an organic material is made easily crushable, so the gripping portions of spacers, dampers, and other parts which have been conventionally used can be used as they are.

Abstract: A sway reduction device having a cable receiving section, the cable receiving section being formed of a shock-absorbing material and comprising a flexure portion and an aperture for receiving a cable therethrough. The sway reduction device also includes a mounting section with subsections and at least one mounting member for mounting the sway reduction device to a surface. The subsections are moveable generally toward and away from each other whereby the flexure portion is flexed when the subsections are moved away from each other for installing the sway reduction device around a cable.

Abstract: For locally supporting an overhead electrical power line, a suspension includes a suspension clamp, the bottom part of which is open laterally and forms a cradle which is associated with a pivoting clamping assembly. The suspension clamp includes, in addition to the clamping system, a pivoting closure clamp which closes the cross-section of the bottom part when required. Applications include installing and supporting low-voltage overhead electrical power lines formed of insulated cables.

Abstract: The invention is directed to a clamp for retaining a fluid hose and/or electrical cable on a robot arm assembly. The clamp includes a base adapted to mount to the robot arm assembly and a top. The base and arm cooperate to allow the top to hinge or swing into an open and closed position to retain the welder. A grommet is preferably retained by the opening defined by the arcuate portions of the top and base. The base may be mounted to the robot arm assembly by a spring assembly or otherwise. A spring mount assembly utilizes a compression spring to provide coupling between the clamp and a mounting plate. Threaded studs are received into the ends of the spring which creates axial elongation for a radially inward force to retain the stud.

Abstract: An overhead power transmission line formed by stranding at least one outwardly projecting strand at the outermost layer of an overhead power transmission line formed by a plurality of strands. At least the outwardly projecting portion of the outwardly projecting strand is composed of an organic material. The outwardly projecting strand has a projection height H within a range defined as 1.5 mm.ltoreq.H.ltoreq.7.0 mm. By setting the projection height H of the outwardly projecting strand equal to or larger than 1.5 mm, the wind noise characteristic can be conspicuously improved. Further, by setting H.ltoreq.7.0 mm, the outwardly projecting strand comprised by an organic material is made easily crushable, so the gripping portions of spacers, dampers, and other parts which have been conventionally used can be used as they are.

Abstract: The invention concerns a method of installing a telecommunication cable (3) on a supporting cable (1), particularly on a ground or phase cable of a high voltage overhead line, whereby the telecommunication cable (3) is laid along the supporting cable (1) and is attached thereto in undulating form with the help of attaching elements (5; 11; 13; 15). This arrangement makes it possible to make repairs in a simple way on the supporting cable (1) and the telecommunication cable (3).

Abstract: Adaptable, line vibration damping/sag adjustment devices are provided with hollow regions that facilitate drilling of larger holes in the devices so that the devices can hold and clamp lines having correspondingly large diameters.

Abstract: A top phase transmission line and bottom phase transmission line are stretched between support steel towers so that the bottom phase transmission line is positioned below the top phase transmission line. Each of the transmission lines has at least two conductors, which conductors are arranged to be substantially parallel and are separated by a substantially constant distance by interconductor spacers. An intermediate phase transmission line may be arranged between the top phase transmission line and bottom phase transmission line as well. Such transmission lines are multiconductor transmission lines. In these multiconductor transmission lines, the conductor positioned at the left side in the top phase transmission line and the conductor positioned at the right side in the intermediate phase transmission line or bottom phase transmission line directly below it are connected by a first interphase spacer made of an insulator.

Abstract: A spacer-twister device for securing to first and second conductors includes an elongate insulating member having first and second ends. A first clamp is rotatably coupled to the first end of the insulating member by a first joint for gripping the first conductor. A second clamp is rotatably coupled to the second end of the insulating member by a second joint for gripping the second conductor. The insulating member provides proper spacing between the first and second conductors with the first and second joints allowing twisting of the first and second conductors. In turn, the twisting prevents or dampens galloping of the conductors.

Abstract: An overhead traction wire support which including a first plate and a second plate, the first plate having on at least one side at least one leg which can be fastened to a ceiling or a wall of a structure. A second plate, which is made of an electrically conducting material, is held at a distance from the first plate via at least one insulator. A current conductor, along which a current collector can slide, is fastened in an electrically conducting fashion to the second plate on the side which faces away from the first plate, and at least one current amplification line is arranged on the second plate parallel to the current conductor.

Abstract: A multiple-cable power transmission line system is provided which includes a plurality of overhead transmission lines each having a ridge on the outer periphery thereof. When the outer periphery-to-crest height of the ridge of an overhead transmission line which is located closer to the earth ground is LE and the outer periphery-to-crest height of the ridges of the other overhead transmission lines is L.sub.OT, the relation L.sub.E <L.sub.OT is fulfilled.

Abstract: A high voltage outdoor power line includes at least one stranded conductor, and at least one damping device for damping mechanical Karman vibrations of the stranded conductor. The damping device includes a plurality of vibration dampers mounted on the stranded conductor by being suspended from respective suspension points on the stranded conductor, a spacing between the suspension points of two directly adjacent vibration dampers in a mounted state being smaller than half of a smallest anticipated wavelength of the Karman vibrations.

Abstract: An antiseismic static electrical converter installation comprises a valve assembly mounted on a platform, the platform being suspended at each of two opposite ends from a series of rods which are attached in a spaced-out relationship to a horizontal beam, the beam being mounted on the ground via rubber springs. During an earthquakes movement of the ground causes mainly lateral distortion of the rubber springs and elastic bending of the rods, and, since the natural resonant frequency of the suspension system is designed to be low and the rubber springs are deigned to have significant damping, a high degree of isolation is provided for the platform and the equipment mounted on it. During severe earthquakes, the rods are arranged to suffer a plastic bending which causes them to act like pendulums and changes the natural frequency of the suspension system to increase the damping and provide greater protection.

Abstract: A spacer damper for providing proper separation and effective vibration damping of subconductors includes a structural hoop about which clamps are positioned at equal intervals. The clamps allow attachment of the spacer damper to the subconductors and are separated by springs about the hoop and between the clamps. The hoop and subconductors are positioned substantially in the same plane to reduce corona effects. Additionally, a suspension clamp is securable to an insulator of a tower to support a subconductor.

Abstract: An aerial cable spacer and support fabricated from separate arm members and braces which are selectively joined to form an open frame device which can be hung from a messenger wire. The inclusion of a plurality of fins at acute angles to the arm members and braces increases the leakage distance between cable phases and with ground while facilitating the washing of the fin surfaces and that between the fins while preventing the build up of water on those surfaces. Different lengths of arm members and braces can be fabricated with the same tooling permitting components to be sized according to the voltage ratings of the cable system.

Abstract: A method of spacing multiple subconductors relative to each other while allowing the subconductors to vibrate without causing damage to the subconductors includes gripping each subconductor with a clamp. Each clamp is secured about a rigid hoop in a manner such that each clamp is capable of sliding along the hoop and rotating about the hoop. The clamps are separated from each other along the hoop with springs which are positioned about the hoop and spaced between the clamps.

Abstract: A method of manufacture and a resultant cable structure of elliptical stranded cable which optimizes the use of existing conventional stranding machines. In accordance with the present invention, one or more layers of shaped, non-circular, wires are interposed to provide support between the inner core of substantially round wires each having essentially the same diameter and the outer layer of round wires of different diameters, which outer layer includes round wires of different diameters which are arranged to provide the minor and major axes of the elliptical cable. The shaped wires are preferably trapezoidal in shape. Alternatively, the shaped wires may be arcuately shaped elliptical wires subtending an angle determined by dividing 360.degree. by the number of shaped wires (for example, 30.degree. for a twelve wire layer) and having an aspect ratio (ratio of major axis X dimension to minor axis Y dimension) sufficient to provide support between the inner core and outer layer of round wires.

Abstract: A spacer-damper for maintaining the spacing between electrical transmission conductors or the like and for damping any vibratory motion of such conductors includes a rigid spacer in the form of a multi-sided frame having at least two spherical mounts for conductor clamps. The clamps are connected to the spherical mounts, but separated therefrom by a resilient damping covering on the spherical mounts. Indentations on the spherical mounts and on the clamps mate with protrusions on inner and outer surfaces of the resilient damping covering to inhibit relative movement therebetween. Longitudinal, transverse and vertical vibrations in the conductors held by the clamps are damped by shear forces which arise within the resilient damping material, longitudinal vibrations being parallel to the ground axially along the length of the conductors, transverse vibrations being parallel to the ground but perpendicular to the conductors, and vertical vibrations being perpendicular to the ground.

Abstract: A spacer damper for installation on twin, triple, or quad bundled lines at various distances along the line to provide proper separation and effective vibration damping of the subconductors includes a structural hoop about which two or more clamps are positioned at equal intervals. The distance between the clamps is maintained by springs about the hoop and between the clamps that compress against each side of the clamp through a flat washer and a rubber washer. The clamps allow attachment of the spacer damper to the subconductors.

Abstract: An underwater cable has a flexible, elongated core surrounded by a flexible, elongated jacket. A distributed jacket includes a helically displaced phase shifter to decouple the cable from strumming produced by shedding of von Karman vortex streets from the cable.

Abstract: An oval or elliptical shaped overhead conductor that is twisted along its length to provide a continuously varying profile to the wind. A single core is comprised of a circular center wire wrapped by circular wires and the core is surrounded or encased by one or more layers of wire strands, including strands of different size from that of the core wires. Each layer is helically wound in a direction opposite to the underlying layers. The surrounding strands may be circular, with the strand sizes symmetrically arranged to result in a substantially oval or elliptical cross-section. Alternatively, the strands may be shaped into symmetrically arranged non-circular arcuate cross-sections, which when wound together result in an oval or elliptical conductor cross-section. The core strands are each circular or round wires having the same diameter, with the result that the core is easy and inexpensive to manufacture.

Abstract: A system for limiting oscillation of a stationary or moving elevator cable attached to suspended elevator equipment in an elevator shaft. The system includes a cable oscillation limiting member located at a predetermined vertical position in the elevator shaft. The limiting member is movable between an extended position vertically in line with the suspended elevator equipment and horizontally proximate the cable in its free-hanging state and a retracted position vertically out of line with the equipment and horizontally distal the cable. The extended position tends to limit oscillations of the cable and the retracted position permits the elevator equipment to pass the member without interference from the member or members and without substantial contact between the elevator equipment and the member under normal operating conditions. The system includes sensors to determine the need for moving the limiting member between its extended and retracted positions, depending upon the position of the elevator.

Abstract: This protective jacket of electrical conductors, tubing or the like has a semi-rigid generally tubular sheet body with male and female seam locking members along opposite lateral edges. A single barb-like hook on the male member engages a complementary pocket in the female member for securely interconnecting the edges and closing the seam. The jacket and seam closing members are integrally extruded and have sufficient stiffness that when the seam is closed, the jacket is in hoop tension.

Abstract: Structures subject to seismic or other vibrations, such as structurally flexible elements of electrical and mechanical power plants, are effectively damped to reduce stresses resulting from such vibrations, by a system of auxiliary mass dampers. The dampers are advantageously connected to the regions of greater expected oscillation in response to such vibrations, to reduce structural stresses. A preferred auxiliary mass damper takes the form of a receptacle containing a fluent or granular material such as lead birdshot in mineral oil.

Abstract: The power line support of the present invention comprises a support tower having a lower end supported on the ground and having an upper end. A power line energy absorber is attached to the upper end of the support tower and comprises a housing attached to the support tower, a reciprocating piston within the housing and pneumatic damping chambers within the housing on opposite sides of the piston for yieldably resisting reciprocating movement of the piston within the housing. A cable is connected to the piston and extends over a pulley downwardly to the electrical insulator which connects to the power line where it supports the power line above the ground. Dynamic energy from the power line is transferred upwardly through the cable to the piston and is absorbed by virtue of the compression and expansion of the air within the chambers on opposite sides of the piston.

Abstract: A series of streamlining elements surrounding a cable, pole, pipe or a similar long round member in a relatively moving fluid such as water or a high wind as an arrangement to reduce drag. Contiguous, independently rotatable elements are added easily to the cable to reduce drag forces by a factor of four or more and to provide some lift.

Abstract: A design for dampening cable oscillations in aerial transmission lines includes an auxiliary cable (4), each end of which is connected to a respective clamp (6) by means of rubber elastic molded elements, which clamps (6), in turn, are to be connected with the conductor cable (1).

Abstract: To install a high voltage device, particularly a high voltage breaker having two interrupting chambers and a high voltage insulator in a simple earthquake resistant manner, an end flange of the high voltage insulator on the ground potential side is rotatably suspended from the support beam of a steel frame. A vibration damper is preferably provided between the high voltage breaker and its suspension device. The vibration damper is attached to a ball received in a socket which is mounted on the support beam. The two interrupting chambers which are connected to one another in a V-shape, are connected to high voltage lines. This inverted suspension is also suitable for current and voltage transformers and overvoltage arresters.

Abstract: A weight is installed in a vertical plane above a subject line. Gravity pulls the weight to an initial angle of about 140 degrees from the starting plane and thereby twists the line. The twist angle remains fixed so long as no gallop occurs. During galloping motion of the line, the initial twist is decreased as the line approaches the peak of motion and reinduced as the line leaves the peak. The line correspondingly rotates between zero degrees added twist and beyond about 140 degrees, the initial added twist angle. The rotation of the line continuously changes the profile of the air foil of the line formed by ice frozen about the line, and thereby dampens air lift and galloping of the line. The weight is attached to the line by a grip and a pair of brackets secured to the grip at one end and fitted through a slot in the weight at opposite ends.

Abstract: A capacitor built-in integrated circuit packaged unit comprising an electrically conductive support member, first and second lead elements associated with the conductive support member, a stack of a plurality of layers comprising a first insulating layer of a highly dielectric material formed on the conductive support member, an electrically conductive layer on the first insulating layer, and a second insulating layer on the conductive layer, the conductive layer having a portion exposed by the second insulating layer, a semiconductor integrated circuit chip having first and second electrodes which are electrically isolated from each other, the second insulating layer intervening between the conductive layer and the semiconductor integrated circuit chip, a bonding wire electrically connecting the first electrode to the first lead element, and a bonding wire electrically connecting the second electrode to the exposed portion of the conductive layer and to the second lead element.

Abstract: A device for damping vibrations of an overhead conductor. The device comprises opposed weight halves, each having spherical outside surfaces. The halves are made of a relatively heavy metal material cast in a sand-casting mold. A housing structure is provided that is made from two stamped halves of lightweight metal. The lower portions of the housing halves are located and secured between the weight halves. The stamped halves resiliently secure opposed hollow elastomer damping members between a sand-cast clamp arm and opposed inside surfaces of the housing structure. Pin means wholly located within the weight halves secure the weight halves and stamped halves together, the housing structure retaining the hollow damping members between the stamped halves and clamp arm.

Abstract: A conductor for overhead transmission of electrical energy. The conductor comprises an inner core and an outer conductor layer comprised of a plurality of strands helically wound on and lengthwise of the core. The strands are of trapezoidal shape in cross-section and have outwardly facing surface provided with deformations spaced apart along the length of the strands. The deformations are effective to reduce the drag of the air moving against and across the conductor.

Abstract: A device for damping vibrations of an overhead conductor comprises a die cast weight and housing comprised of opposed weight and housing halves located on opposed sides of a clamp arm and having spherical outer surfaces to minimize corona and tooling costs. The clamp arm is located between two tubular elastomer damping elements secured in place between the clamp arm and the weight and housing halves. The damping device, in addition, includes a pin that secures the weight and housing halves, clamp arm, and damping members together in a sandwich-like construction.

Abstract: An improved fastener system supports an aerodynamic wind damper below a cable system. The cable system comprises a suspension support strand that supports a cable, such as a telephone cable. The fastening system comprises a spacer interposed between the support strand and the cable to maintain the support strand and the cable in a spaced-apart relationship. A cable strap, preferably of stainless steel, is wrapped around the support strand and the cable to cinch the support strand and the cable to the spacer. The cable strap is further wrapped around the support strand and the cable with a portion of the strap lying below and spaced apart from the cable to provide a means for supporting the aerodynamic wind damper below the cable in a manner permitting the pivotal movement thereof.

Abstract: A static electrical converter for high voltage DC is provided with at least one valve assembly which has one or more valves electrically connected in series. Each of these valves includes a plurality of valve modules carried by a carrier for dependent mounting. The valve modules are connected to the carrier with the aid of resilient members allowing vertical spring movement between the valve modules and the upper portion formed for suspension of the carrier.