Universal brake assembly

A system comprising a cable held in suspension and a trolley traveling along the cable. The trolley may include a brake pad positioned to contact the cable. The brake pad may include a plurality of segments contacting the cable. A first such segment may be formed from a first material. A second such segment may be formed from a second material, distinct from the first material. The sequence, composition, gaps, and the like of the plurality of segments may be selected to provide a desired resistance to wear, frictional coefficient, all-weather braking, and the like.

BACKGROUND

1. The Field of the Invention

This invention relates to suspended cable systems and, more particularly, to novel systems and methods for braking and retrieving trolleys traveling on suspended cable systems.

2. The Background Art

Weather conditions such as temperature and wetness affect the performance of typical trolleys configured to slide or roll along suspended cables. For example, rain on a cable may significantly change the coefficient of fiction between a trolley brake and the cable. Accordingly, a trolley brake that is acceptable for dry conditions, may be unacceptable for wet conditions. Thus, operators must closely monitor weather conditions when using current trolleys. What is needed is a trolley brake providing acceptable performance across a greater range of weather conditions.

Many trolley systems, sometimes called Ziplines, provide no braking. They simply use a cable declining at a shallow angle in which a rise at the lower end slows a user. Others may have a brake set at a fixed parameter. Also, current trolleys do not provide a user control “on-the-fly” over the magnitude of a braking force or friction force generated by the trolley as it travels along a cable. That is, to one degree or another, a user or knowledgeable operator must preselect the braking force or the range of braking force to be provided by the trolley. Once selected, the arrangement is not easily or safely changed without stopping the trolley and relieving the trolley of the user's weight. In certain embodiments, legal liability and user inexperience may favor such inflexibility. However, in other embodiments, greater user control may be desirable. Accordingly, what is needed is a trolley providing safe, “on-the-fly” adjustment between minimum braking and maximum braking.

Furthermore, when using a trolley as the basis for an amusement ride, revenue may largely depend on the number operators employed to operate the ride and throughputs the number of users served within a given period of time. Currently, to a large degree, safety concerns dictate the numbers for both. For example, one of the potential hazards of an amusement ride employing a trolley is the possibility of collision. A first rider may ride a first trolley to some location along a cable. Assuming that the first rider has reached the bottom and exited the ride, a second rider may ride a second trolley down the same cable. Accordingly, if the first rider did not actually reach the lower end due to over-braking, serious injury may occur when the second rider collides with the first rider. What is needed is a trolley retrieval system configured to maximize user throughput, minimize operator interaction, and reduce or eliminate the risk of collision.

BRIEF SUMMARY OF THE INVENTION

In view of the foregoing, in accordance with the invention as embodied and broadly described herein, a method and apparatus are disclosed in one embodiment of the present invention as including a trolley comprising a frame, a brake assembly, and a sheave mount. In selected embodiments, a brake assembly in accordance with the present invention may provide significant adjustability. For example, a brake assembly may include a brake pad that may be removed and replaced, should wear so dictate. Additionally, a brake pad may itself be readily adjustable to provide a desired or customized braking effect to suit conditions.

Various material properties and characteristics may be considered when selecting a material for a brake pad in accordance with the present invention. Often a material that has certain advantageous characteristics may have others that are disadvantageous. For example, one material may have excellent wear resistance, but its coefficient of friction against a cable may vary greatly depending on whether the cable is dry. Accordingly, the material may be suitable for dry conditions, yet be hazardous for wet conditions.

In certain embodiments, it may be advantageous to provide a brake pad having repeatable and consistent performance with respect to wear, coefficient of friction, or the like regardless of temperature, wetness, etc. To provide the advantages of a brake pad in accordance with the present invention, a brake pad may be formed of various segments, typically positioned in series. So positioned, the width of each segment may control the contact area between each segment and the cable. The contact area may vary between segments. For example, in certain embodiments, one segment may have a width greater than the width of another segment. Accordingly, the former segment may provide a greater contribution to the overall performance of the brake pad than the latter segment.

By controlling the composition of the segments, the contact area of the segments, and the gaps between the segments, the performance of a brake pad may be optimized to a given trolley application. For example, in selected embodiments, it may be desirable for a brake pad in accordance with the present invention to slide along a cable. That is, the brake pad may reduce the speed of the trolley along the cable12, but not overly slow or stop it.

Accordingly, in one embodiment, certain segments may be formed of a first, substantially inelastic material (e.g., high density polyethylene (HDPE), ultra high molecular weight (UHMW) polyethylene, or the like). The rest of the segments may be formed a second, elastic material (e.g., multi-rubber or elastomeric materials such as are used for the caliper brake pads of a bicycle). Elastomers may strip water from a surface, but typically do not wear as well as other polymers. Accordingly, overall, the brake pad may have both acceptable wear and frictional engagement even when applied to a wet cable. By adjusting the number of segments corresponding to the first and second materials and the contact areas associated with those segments, a proper balance of characteristics may be achieved.

In selected embodiments, a trolley in accordance with the present invention may provide a user (e.g. operator, or rider in some circumstances) “on-the-fly” control over the magnitude of a braking force generated by the trolley as it travels along a cable. For example, by adjusting the moment arm (e.g. leverage) at which the weight of a user is applied to the frame of a trolley, the magnitude of the resulting moment may be controlled. The magnitude of the moment may then dictate the magnitude of the normal force against the cable generating the frictional braking force. Accordingly, by adjusting the moment arm at which the weight of a user is applied to the frame of a trolley, a user may control, within a particular range, the speed of the trolley for a particular catenary, or naturally hanging cable.

In selected embodiments, a trolley may include a carriage configured to secure to, operate with, and be adjusted with respect to a frame or portion of a frame throughout a range of motion bounded by a first position of the carriage and a second position of the carriage with respect to the frame. A carriage may move along the frame through the range of motion without compromising the connection between a user and the cable. Accordingly, adjustment of the position of the carriage with respect to the frame, and the resulting adjustment to the braking force, may safely be accomplished in any suitable manner while the trolley including the carriage and frame is in motion along the cable.

In certain embodiments, absent contrary inputs or forces, a carriage may, under the impetus of gravitational acceleration, move toward the second position. At the second position, the braking force may be at a maximum. Accordingly, a trolley in accordance with the present invention may have a default configuration corresponding to maximum braking, which, given typical cable declination, is sufficient to bring the trolley to a halt, such as in the event of any failure of the trolley.

Trolleys in accordance with the present invention may be used as the basis for an amusement ride. For such rides, revenue may largely depend on the number of operators employed to operate the ride and the number of users served within a given period of time. Accordingly, a trolley retrieval system in accordance with the present invention may be configured to maximize user throughput, minimize operator interaction, and increase safety.

In selected embodiments, a trolley retrieval system may include multiple cables held in suspension between first and second supports. A retrieval line may be suspended in an open line or in a closed loop extending from proximate a start area to proximate a finish area. A closed loop is more readily controllable and less likely to tangle or fail to deploy properly. A motivator (e.g. motor) may selectively circulate the retrieval line back and forth or around the loop. A controller may control operation of the motivator.

In certain embodiments, a controller may include a processor and one or more sensors. The sensors may be operably connected to the processor to pass thereto a stop signal informing the processor that one or more of trolleys is sufficiently near the start area. The processor may be programmed to issue, in response to the stop signal, a stop command causing the motivator to cease circulation or other operation of the retrieval line. The processor may be further programmed to issue, in further response to the stop signal, a reverse command causing the motivator to reel in or circulate the retrieval line in an opposite direction when it resumes circulation of the retrieval line. For example, a motive source may comprise an electric motor. In such an embodiment, the controller of such a motivator may include a polarity switch switching, in response to the reverse command, the polarity of the current supplied to the electric motor. A controller may further include a retrieval switch operably connected to cause, when activated, the motivator to resume circulation of the retrieval line.

In operation, an amusement ride in accordance with the present invention may begin with selection of a system comprising one or more cables held in suspension between first and second supports and a trolley positioned to travel along each cable. A user may then be connected to the trolley. Following securement of a user into a harness or possibly of a harness or seat of a user thereto, the trolley may be released to travel along the cable from proximate the start area to proximate the finish area. At the finish area, the user may be disconnected from the trolley. The trolley may then be connected to a retrieval line. Safety will usually favor fastening a user into a harness already connected to the main support cable rather than connecting and disconnecting harnesses and trolleys from a main support cable.

Once a trolley is connected to a retrieval line, the motivator may be activated to draw the trolley along the cable from proximate the finish area to proximate the start area. When one or more of the trolleys connected to a retrieval line activates a sensor, the motivator may stop the retrieval line. The trolley or trolleys may then be disconnected from the retrieval line and secured for future use.

As stated hereinabove, in selected embodiments, a processor may be programmed to issue, in response to a stop signal, a reverse command causing the motivator to circulate the retrieval line in an opposite direction when it resumes circulation of the retrieval line. So configured, the engagement locations between a retrieval line and a trolley may travel in a cycle from the starting (e.g. loading, launching) area to the finishing (e.g. end, unloading) area and back. Moreover, while one engagement location is stopped at the starting area, another may be stopped at the finish area.

Accordingly, while one or more trolleys are being loaded with users, other trolleys may be connected to a retrieval line. Also, while one or more trolleys are towed or pulled back up from the finish area to the start area, other engagement locations on the retrieval line may be returning to the finish to continue the cyclical pattern. So configured, a trolley retrieval system in accordance with the present invention may provide a substantially continuous throughput, minimize operator interaction, and increase safety.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring toFIG. 1, in discussing a trolley10in accordance with the present invention, it may be advantageous to establish a coordinate system11. Accordingly, a trolley10may be defined in terms of a longitudinal direction11a, a lateral direction11b, and a transverse direction11c, substantially orthogonal to one another.

A trolley10in accordance with the present invention may be configured for travel along a cable12in the longitudinal direction11a. In general, a trolley10of the present invention may be applied to a cable12held in suspension by two or more supports. For example, as disclosed in U.S. Pat. No. 6,622,634 issued Sep. 23, 2003 and entitled AMUSEMENT RIDE EMPLOYING A SUSPENDED TENSIONED STATIC CABLE, which is incorporated herein by reference, a cable12may be supported between two supports (e.g., towers, platforms). A first support may hold one end of the cable12at a higher elevation than a second support holds the other end of the cable12. Accordingly, a trolley10secured to roll along the cable12may tend to travel from the first, upper support toward the second, lower support.

While a suspended cable12may provide the basis for an amusement ride, other uses are also contemplated. For example, a suspended cable12may be used as part of a lift system transporting persons or goods over or up certain geologic obstacles. Suspended cables12are commonly used on ski lifts, gondolas, aerial trams, and the like. Similarly, suspended cables12have been incorporated into evacuation systems (e.g., oil derrick evacuation systems). Whether for repair, evacuation, or as part of the system itself, such suspended cable12systems often require a trolley10in accordance with the present invention.

In selected embodiments, a frame14may provide the main structure of the trolley10or a base to which other components may secure. A frame14may be formed of any suitable material or combination of materials. Characteristics that may be considered when selecting the material for the frame14may include cost, formability, machineability, strength, rigidity, durability, corrosion resistance, density, etc. In certain embodiments, aluminum has been found to be a suitable material for a frame14.

A frame14may extend from a first end16to a second end18. In certain embodiments, a brake assembly20may connect to the frame14proximate the first end16thereof. Proximate the second end18, a bumper assembly22may connect to the frame14. In one embodiment, a bumper assembly22may include a bumper24held between two cheek plates26. In selected embodiments, a bumper24may be formed of a friction-reducing polymeric material (e.g., HDPE, UHMWPE, PTFE). In other embodiments, a bumper24may be formed of an elastomeric (e.g. rubber compound) material.

A sheave mount28may connect to the frame14at a location between the brake assembly20and the second end18. A sheave mount28may support one or more sheaves30positioned to roll along the cable12. In selected embodiments, the portion32of the frame14between the sheave mount28and the second end18may be characterized as the user-suspension-portion32. That is, the weight of a user may be directed to, and supported by, this portion32of the frame14.

In certain embodiments, the frame14of a trolley10in accordance with the present invention may be suspended below a cable12in the transverse direction11c. A sheave mount28may extend upwardly from the frame14, positioning a sheave30to roll on an upper surface of the cable12. A brake assembly20may extend upwardly from the frame12to contact a lower surface of the cable12. With the brake assembly20and user-suspension portion32on opposite sides of the sheave mount28, the weight34of a user applied to the user-suspension portion32may generate a torque36or moment36urging the brake assembly20to “pitch” against the underside of the cable12(i.e., generate or urge rotation about an axis extending in the lateral direction11b). The greater the moment36generated, the greater the braking force or friction force produced by the brake assembly20.

A carriage38may provide the primary interface between a user and a trolley10in accordance with the present invention. That is, while other locations, apertures, connection, structures, and the like may be used for redundant, fail-safe systems, in normal use, the majority of user weight34may be applied to the carriage38. The carriage38, in turn, may communicate that load to the frame14.

The position of the carriage38with respect to the frame14may be adjusted to provided a desired braking force. For example, the greater the distance40between the sheave mount28and the carriage38, the greater the moment36and resulting braking force. The opposite may also be true. That is, the braking force may be minimized by minimizing the moment arm40over which the weight34of a user may act.

Adjustability and securement between a carriage38and a frame14may be provided by any suitable structures. In selected embodiments, an array of apertures42may provide an array of positions at which a carriage38may be secured to a frame14. A pin44or bolt44may pass through a carriage38and a selected aperture of the array42to lock the carriage38at a desired moment arm40. Accordingly, a trolley10in accordance with the present invention may be tuned to a particular cable12arrangement. That is, a trolley10may be formed according to a single design, yet be flexible within that design to provide braking appropriate for a wide range of cable12arrangements.

For example, given a first cable12arrangement involving a comparatively larger change in elevation, a trolley10traveling on such a cable12may tend to reach excessive speeds. Thus, the carriage38may be secured to the frame14at an aperture46in the array of apertures40providing a corresponding, comparatively larger moment arm40. This greater moment arm40may increase the braking force and keep the trolley10within acceptable speed ranges.

Conversely, consider a second cable12arrangement involving a minimal change in elevation. For such an arrangement, a carriage38secured at certain apertures (e.g., aperture46) may provided excessive braking. For example, the resultant braking may cause the trolley10to stop without reaching the unloading area at the bottom of the cable12. According, for such arrangements, a carriage38may be secured to the frame14at an aperture48in the array of apertures40providing a minimal moment arm40. By so positioning the carriage38, the trolley38may provide greater speed along the cable12.

While the weights of different users may vary, a trolley10in accordance with the present invention may automatically compensate for such variations. For example, the braking force required to regulate the speed of a trolley10carrying a user weighing 200 lbs. may be significantly greater than the braking force required to regulate the speed of a trolley10carrying a user weighing 100 lbs. However, with a single setting of the carriage38(i.e., a single moment arm40), at trolley10may appropriately regulate the speed of both users.

The braking force generated by a trolley10is equal to the coefficient of friction between the brake assembly20and the cable12multiplied by the normal force urging the braking assembly20against the cable12. For a single moment arm40, the only variable becomes the weight34of the user. Accordingly, the normal force urging the braking assembly20against the cable12, which is result of the moment36applied by the weight34of a user to the frame14, controls the braking force. Thus, without adjusting the position of the carriage38, the braking force generated for a user weighing 200 lbs. user will automatically be roughly twice that generated for a user weighing 100 lbs. That is, a trolley10may be tuned to a particular cable12arrangement, but need not be tuned for each user.

A trolley10in accordance with the present invention may include any desirable redundant or fail-safe systems. For example, in selected embodiments, a frame14may include a slot50within or along which the carriage38may travel. Accordingly, if the pin44holding the carriage38in a particular location were to fail, the carriage38would not be free to separate from the frame14. Additionally, the orientation of the slot50with respect to the weight34of a user may urge an unpinned carriage38toward the end of the slot50corresponding to the second end18of the frame14. At such a location, the moment arm40and corresponding braking force may be at a maximum. Accordingly, if a pin44were to fail, the link between the user and the cable12would not be lost and the trolley10would quickly be brought to a halt.

Referring toFIG. 2, in selected embodiments, a sheave mount28in accordance with the present invention may be pivotably secured to a frame14. For example, in certain embodiments, a bolt52may extend through the frame14. If desired, a collar54may be positioned over the bolt52to improve wear resistance, increase the rigidity of the bolt52, or the like.

In certain embodiments, to increase safety, a sheave mount28may provide an enclosure capturing a cable12therewithin. That is, once the sheave mount28has received a cable12therewithin, it may resist inadvertent removal of that cable12. For example, in one embodiment, a sheave mount28may include a first side56extending from the bolt52to an aperture58for supporting a sheave30. This first side56may include one or more ribs60to increase the rigidity and strength thereof. A top62of the sheave mount28may connect the first side56to a second side64of the sheave mount28. In selected embodiments, the second side64may control admittance and release of a cable12from within the sheave mount28.

In selected embodiments, the second side64of a sheave mount28may be separated into a hook portion66and a bail assembly68. In one embodiment, the hook portion66may be connected to the top62and include an aperture70that, in combination with another aperture58, may pivotably connect a sheave30to the sheave mount28. A hook portion66may also include a hook72.

A bail assembly68may include a bail74and a bail mount76. A bail mount76may connect to the bolt52or collar54extending through the frame14from the first side56of the sheave mount28. A bail74may, in turn, extend from the bail mount76to engage the hook72of the hook portion66. In selected embodiments, a bail74may be biased toward a closed position with respect to the hook72. Accordingly, in certain embodiments, a bail74may be moved (e.g., pivoted) to permit entry of a cable12into the sheave mount28. Once the cable12is captured with the sheave mount28, the bail74may be released to return automatically to its preferred (biased), closed position.

In selected embodiments, the interface between a bail74and a hook72may be such that the bail74is configured to open only toward the interior of the sheave mount28. Thus, the bail74may be biased to permit entry of a cable12into the sheave mount28but resist inadvertent removal of that cable12. As an additional safety feature, in certain embodiments, a bail mount76may include a slotted aperture78extending therethrough to receive the bolt52, collar54, or some combination thereof. A tensioner80may control the position of the bolt52, collar54, etc. within the slotted aperture78.

Accordingly, once a cable12has been received within a sheave mount28and the bail74has returned to a closed position, the tensioner80may be adjusted to move the bail assembly68with respect to the bolt52, collar54, etc. Thus, the bail74may be pulled82firmly into engagement with the hook72. In such an arrangement, the hook72may resist opening of the bail74. Additionally, the bail assembly68may assist in transferring loads from a sheave30to the frame14of the trolley10. That is, the first side56of the sheave mount28need not act alone, thereby increasing the load-bearing capacity, and corresponding safety factor, associated with the sheave mount28.

Referring toFIG. 3, in selected embodiments, a trolley10in accordance with the present invention may include a brake assembly20that is pivotably secured to the frame14. A pivotable connection between a brake assembly20and a frame14may support a more controlled and even wear on the break assembly20.

In certain embodiments, to provide a pivoting securement between a brake assembly20and a frame14, the frame14may include various apertures84,86. A pivot aperture84may be sized and shaped to receive a pivot bolt (i.e., a bolt about which the brake assembly20may pivot). A limiting aperture86may be sized and shaped to receive a limiting bolt (i.e., a bolt moving with the brake assembly20and abutting the extremes of the limiting aperture86when the brake assembly20reaches a desired limit to its pivoting).

In selected embodiments, a frame14may include multiple pivoting apertures84a,84b,84c. For example, a first pivoting aperture84amay provide a pivot point (e.g., central pivot point) for a brake assembly20of a first size. A second pivoting aperture84bmay provide a pivot point for a brake assembly20of a second, smaller size. A third pivoting aperture84cmay provide a pivot point for a brake assembly20of a third, even smaller size. If desired, multiple limiting apertures86may be provided. In one embodiment, however, a single limiting aperture86may be sized and shaped to providing a limiting effect to brake assemblies20pivoting in any of the various pivoting apertures84.

Referring toFIGS. 4 and 5, a brake assembly20in accordance with the present invention may provide significant adjustability. For example, a brake assembly20may include a brake pad88that may be removed and replaced, as wear so dictates. Additionally, a brake pad88may itself be adjustable to provide a desired or customized braking effect. In selected embodiments, a brake pad88may comprise a plurality of interchangeable brake pad segments89. Thus, the sequence, composition, gaps, and the like of the various segments89may be selected to provide a desired resistance to wear, frictional coefficient, all-weather braking, and the like.

In certain embodiments, the various segments89of a brake pad88may be held in place by one or more brake shoes90. For example, in one embodiment, a first brake shoe90amay engage one side of the brake pad88, while a second brake shoe90bmay engage the other side of the brake pad88. Accordingly, in such an embodiment, the brake shoes90may securely hold the brake pad88therebetween.

In selected embodiments, the brake pad88and one or more brake shoes90may be configured to facilitate mutual engagement. For example, in one embodiment, the various segments89of a brake pad88may include one or more extensions92. The brake shoes90may include one or more recesses94shaped and sized to receive the extensions92. Accordingly, when assembled, the brake shoes90may secure the brake pad88in all three dimensions11a,11b,11c.

If desired or necessary, a brake assembly20may include various structural members providing additional strength, rigidity, safety, or the like. For example, in selected embodiments, a brake assembly20may include one or more cheek plates96. In one embodiment, a brake assembly20may include a first cheek plate96apositioned to reinforce a first brake shoe90aand a second cheek plate96bpositioned to reinforce a second brake shoe90b.

In certain embodiments, a cheek plate96may include various apertures to support desired functionality. For example, a cheek plate96amay include an aperture98sized and positioned to receive a limiting bolt, one or more apertures100sized and positioned to receive a pivot bolt, and one or more apertures102sized and positioned to receive assembly bolts or bolts securing the brake assembly20together. In selected embodiments, corresponding apertures98,100,102may be formed in other cheek plates96b, as well as the various brake shoes90.

In selected embodiments, a brake assembly20may include a groove104or slot104sized and positioned to accommodate a portion of the frame14therewithin. Accordingly, in such embodiments, a brake assembly20may effectively straddle the frame14, permitting various fasteners (e.g., pivot bolts, limiting bolts, etc.) to pass through both the brake assembly20and the frame14. If desired or necessary, a slot104may extend some distance less than the entire length of the brake assembly20. For example, in one embodiment, opposing brake shoes90a,90bmay each include a shoulder106extending to meet the other. The shoulders106may effectively close the slot104. Accordingly, any fastener (e.g., assembly bolt) passing through the area of the shoulder106may be tightened without clamping the frame14and reducing the ability of the brake assembly20to pivot with respect to the frame14.

A brake assembly20in accordance with the present invention may include a capture108. A capture108may secure a cable12therewithin. That is, once a trolley10is applied to a cable12, the capture108may secure the brake assembly20to the cable12. Accordingly, the capture108may provide a redundant safety mechanism and, should there be a catastrophic failure of the sheave mount28, the trolley10may be secured to the cable12via the brake assembly20and capture108.

If desired, a capture108may include a slide110. In certain embodiments, a slide110may provide an interface between a capture108and a cable12. For example, a capture108may in certain situations slide along a cable12. In such situations, a slide110may prevent abrasion or grinding that may reduce the structural integrity of the capture108. In one embodiment, a slide110may include a groove112or slot112providing a preferred or default location of engagement between a slide110and a cable12, should contact occur therebetween.

Referring toFIG. 6, a capture108in accordance with the present invention may have any suitable shape or configuration. Additionally, a capture108may secure to the rest of the brake assembly20in any suitable manner. For example, in one embodiment, a capture108may be positioned and secured to bracket the rest of the brake assembly20. Such bracketing may improve the structural integrity of the brake assembly20without requiring additional fasteners (e.g., bolts), which may interfere with the adjustability or functionality of the brake assembly20. Portions of the capture108may be held in place by one or more bolts extending in the lateral direction11bthrough the brake assembly20. For example, in one embodiment, a capture108may be held in place by a limiting bolt114and an assembly bolt116.

Referring toFIG. 7, various material properties and characteristics may be considered when selecting a material for a brake pad88in accordance with the present invention. Properties and characteristics that may be considered include cost, availability, machineability, wear resistance, toughness, all weather performance (e.g., characteristics at various conditions of humidity, moisture, corrosion, temperature, and the like), coefficient of friction against a cable12in various weather conditions (e.g., temperature and wetness levels), and the like. Often a material that has certain advantageous characteristics may have others that are disadvantageous. For example, one material may have excellent wear resistance, but its coefficient of friction against a cable12may vary greatly depending on whether the cable is dry. Accordingly, the material may be suitable for dry conditions, yet be hazardous for wet conditions.

In certain embodiments of a trolley10in accordance with the present invention, it may be advantageous to provide a brake pad88having repeatable and consistent performance with respect to wear, coefficient of friction, or the like regardless of temperature, wetness, etc. For example, by providing a brake pad88with consistent wear, fixed maintenance schedules may be determined and executed. The resulting decrease in subjectivity may be accompanied by an increase in consistency and safety. Similarly, by providing a brake pad88with a consistent coefficient of friction regardless of the wetness of the cable12, rain need not concern an operator of a trolley10in accordance with the present invention. Again, the resulting decrease in subjectivity and weather dependence may be accompanied by an increase in consistency and safety.

In selected embodiments, a brake pad88may be configured to operate within a specific range. For example, a brake pad88may perform within a range, regardless of environmental temperature and the wetness or dryness of a cable12. A brake pad88may deliver a rider to the bottom end of a cable12at a first speed in a dry environment at 90 degrees Fahrenheit. That same brake pad88may deliver a rider to the bottom end of a cable12at a second speed, different from the first speed, in a wet (e.g., saturated cable12) environment at 65 degrees Fahrenheit. However, the difference between the first and second speeds may be such that both are within an acceptable range. For example, while the first may be 20 miles per hour and the second may be 27 miles per hour, both speeds may be below a hypothetical safety cutoff of 35 miles per hour.

To provide the advantages of a brake pad88in accordance with the present invention, a brake pad88may be formed of various segments89The various segments89may be formed in various shapes and of various materials. As stated hereinabove, the shape of the various segments89may support engagement with the rest of the brake assembly20(e.g., the brake shoes90). The shape of the various segments89may also control the contact area between a segment89and a cable12.

In selected embodiments, a brake pad88may include a plurality of segments89positioned in series. So positioned, the width of each segment89in the longitudinal direction11amay control the contact area between each segment89and the cable12. The contact area may vary between segments89. For example, in certain embodiments, one segment89amay have a width118greater than the width120of another segment89b. Accordingly, the former segment89amay provide a greater contribution to the overall performance of the brake pad88than the latter segment89b. Although friction forces are independent from the area engaged, wear is not.

If desired, gaps122may be included between various segments89of a brake pad88. In certain embodiments, gaps122may improve the all weather performance of a brake pad88. For example, when a cable12is saturated with water, the gaps122may provide locations for the water to escape from between the cable12and a segment89being pressed thereagainst. The size124or width124of the gaps122in a brake pad88may vary from a minimum of direct abutment between adjacent segments (e.g., segment89aand segment89b) to some maximum.

By controlling the composition of the segments89, the contact area of the segments89, and the gaps122between the segments89, the performance of a brake pad88may be optimized to a given trolley10application. For example, in selected embodiments, it may be desirable for a brake pad88in accordance with the present invention to slide along a cable12. That is, the brake pad88may lower the speed of the trolley10along the cable12, but not overly slow or stop it. Accordingly, in one embodiment, certain segments89a,89c,89e,89gmay be formed of a first, substantially inelastic material (e.g., high density polyethylene (HDPE) or ultra high molecular weight polyethylene (UHMWPE)). The rest of the segments89b,89d,89f,89hmay be formed a second, elastic material (e.g., multi-rubber or other natural or synthetic elastomeric materials such as those used for the caliper brake pads of a bicycle).

So arranged, the first material may provide the desired wear resistance and a suitable (e.g., limited) frictional engagement with a dry cable12. The second material may not wear as well as the first material, yet provide a suitable water stripping or frictional engagement with a wet cable12. Accordingly, overall, the brake pad88may have both acceptable wear and frictional engagement even when applied to a wet cable12. By adjusting the number of segments89corresponding to the first and second materials and the contact areas associated with those segments89, a proper balance of characteristics may be achieved.

Referring toFIG. 8, in selected embodiments, two materials and two larger gaps122may be all that is required to provide a satisfactory brake pad88. Additionally, for optimum performance, the contact area between the two materials may only slightly favor one material over the other. In such an embodiment, a first plurality of segments89a,89c,89e,89g,89imay be formed of a first material. A second plurality of segments89b,89d,89f,89hmay be formed of a second material. If desired, the segments89may be positioned in an alternating pattern. Accordingly, each segment89of the second material may be positioned between segments89corresponding to the first material.

Alternatively, the segments89a,89c,89e,89g,89icomprising the first material may be positioned adjacent one another, and the segments89b,89d,89f,89hcomprising the second material may be positioned adjacent one another. In such an embodiment, the segment89a,89c,89e,89g,89icomprising the first material may be consolidated into a single monolithic (i.e., seamless) unit. Similarly, the segments89b,89d,89f,89hcomprising the second material may be consolidated into a single monolithic unit.

Referring toFIG. 9, in selected embodiments, two materials and minimal gaps122may be all that is required to provide a satisfactory brake pad88. Additionally, for optimum performance, the contact area between the two materials may favor one material over the other (e.g., 75 percent one material, 25 percent another). In such an embodiment, a first plurality of segments89a,89c,89e,89g,89imay comprise a first material. A second plurality of segments89b,89d,89f,89hmay comprise a second material. Again, the segments89may be positioned in an alternating pattern. Alternatively, the segments89a,89c,89e,89g,89icomprising the first material may be positioned adjacent one another and the segments89b,89d,89f,89hcomprising the second material may be positioned adjacent one another. Adjacent segments89of common material may be consolidated as desired.

Referring toFIG. 10, in selected embodiments, more than two materials122may be required to provide an optimal brake pad88. For example, for optimum performance, three materials may be needed in varying degrees (e.g., contact area comprising 45 percent of a first material, 30 percent of a second material, and 25 percent of the last material). In such an embodiment, a first plurality of segments89a,89e,89imay comprise a first material. A second plurality of segments89c,89gmay comprise a second material. A third plurality of segments89b,89d,89f,89hmay comprise a third material. Again, the segments89may be positioned in an alternating or distributed (e.g., balanced) pattern. Alternatively, the segments89may be separated and arranged by material type, and, if desired, consolidated into a minimum number of segments89(e.g., only one segment89for each type of material).

Referring toFIGS. 11 and 12, in selected embodiments, a trolley10in accordance with the present invention may provide a user readily adjustable, or even “on-the-fly,” control over the magnitude of a braking force126or friction force126generated by the trolley10as it travels along a cable12. The braking force126may be equal to the normal force128urging the brake assembly20against the cable12multiplied by the friction coefficient for the brake pad88against the cable12. With the friction coefficient for the brake pad88against the cable12being substantially constant, the braking force126may perhaps most easily be manipulated by manipulations of the normal force128.

For example, by adjusting the moment arm40at which the weight34of a user is applied to the frame14of a trolley10, the magnitude of the resulting moment36may be controlled. The magnitude of the moment36may then dictate the magnitude of the normal force128. Accordingly, by adjusting the moment arm40at which the weight34of a user is applied to the frame14of a trolley10, a user may control, within a particular range, the braking force126generated by the trolley10.

In selected embodiments, a trolley10in accordance with the present invention may include a carriage38configured to travel along a frame14or portion of a frame14through a range (e.g., continuous range) of motion bounded by a first position of the carriage38proximate the sheave mount28(e.g., the position of the carriage38inFIG. 11) and a second position of the carriage38proximate a second end18of the frame14(e.g., the position of the carriage38inFIG. 12).

In certain embodiments, a carriage38may travel along the frame14through the range of motion bounded by the first and second positions without compromising the connection between a user and the cable12. Accordingly, adjustment of the position of the carriage38, and the resulting adjustment to the braking force126, may safely be accomplished in any suitable manner while the trolley10is in motion along the cable12. That is, in selected embodiments, neither a stopped trolley10nor any change in the connection between a user and a cable12may be necessary to transition from minimum leverage and braking to maximum leverage and braking.

In selected embodiments, the default position of a carriage38with respect to the frame14may be the second position (e.g., the position of the carriage38inFIG. 12). That is, absent contrary inputs or forces, a carriage38may, under the impetus of gravitational acceleration, move toward the second position. At the second position, the braking force126may be at a maximum. Accordingly, a trolley10in accordance with the present invention may have a default configuration corresponding to maximum braking, which, given typical cable12declination, is sufficient to bring the trolley10to a halt.

Referring toFIGS. 13 and 14, in selected embodiments, a trolley10in accordance with the present invention may be configured to facilitate travel of the carriage38along the user-suspension portion32of the frame14. For example, in selected embodiments, a frame14may include a rail130to provide a suitable surface over which a carriage38may travel. In certain embodiments, a rail130may provide a substantially planar surface. If desired, a rail130may be formed of a material dissimilar from the rest of the frame14. For example, in embodiments where the frame14may be formed of aluminum, a rail130formed of steel may be connected to the frame14to provide a more durable surface over which a carriage38may travel.

A trolley10may be configured to resist removal of a carriage38from the frame14. For example, in selected embodiments, a sheave mount28may prevent a carriage38from passing therebeyond (e.g., beyond the first position). Similarly, the second end18of the frame14may be configured to prevent a carriage38from passing therebeyond (e.g., beyond the second position). For example, in certain embodiments, the second end18of the frame14may be shaped to include a rise132extending transversely11cfrom the frame to resist passage of the carriage38thereover. Also, in some embodiments, the second end18of a frame14may include a stop134(e.g. bolt, pin, etc.) extending laterally11bfrom the frame to block passage of the carriage38.

In certain embodiments, a carriage38may include two cheek plates136bracketing the frame14. Various fasteners138,140, and142may extend between the cheek plates136to connect the plates136together. Such fasteners138,140,142may also support various functions of a carriage38. For example, one fastener138may provide a user mount144or a location144at which a user may connect to or tie into the carriage38and transfer his or her weight34thereto. Another fastener140may support a roller146, bushing146, or bearing146facilitating travel of the carriage38along the rail130. Yet another fastener142may provide a structure supporting manipulation of the carriage38along the rail130.

For example, in selected embodiments, a fastener142may provide a location for a tether148to engage the carriage38. If desired, a tether148may extend from the carriage38, over the pivot52, bolt52, or fastener securing the sheave mount28, and down toward a user. Thus, by pulling150down on the tether148, a user may pull152the carriage38toward the first position and the minimum braking corresponding thereto. Conversely, by releasing the tether148or sufficiently lowering the downward force150applied to the tether148, the carriage38may travel toward the second position and the maximum braking corresponding thereto.

A user may engage or manipulate a tether148in any suitable manner. For example, in one embodiment, a tether148may be connected to a handle suspended at an appropriate height for the user. Accordingly, the user may simply grab the handle and pull150down on the tether. Alternatively, a tether may extend to engage the foot of a user. For example, a user may position a foot within a loop connected to the tether148. Thus, by weighting the foot (e.g., shifting some of the weight34of the user from the carriage to the tether148), the tether148may be pulled150downward.

Accordingly, while a carriage34may be the primary suspension point for the weight34of the user, portions of that weight34may be diverted as necessary to adjust the position of the carriage38or to otherwise increase the safety of a trolley10. For example, in selected embodiments, various apertures154may be provided in a frame14. Such apertures154may support redundant user support systems taking a portion of the weight34of a user in normal use and a substantial portion of the weight34of a user in compromised use. Additionally, such apertures154may provide locations for supporting other loads or persons not directly responsible for the operation of the trolley10(e.g., a rescuee being lowered from a stalled chair lift).

In selected embodiments, a trolley10in accordance with the present invention may be configured for rapid engagement with and disengagement from a cable12. In such embodiments, a capture108may be omitted. Alternatively, a capture108providing rapid release may be employed. For example, in one embodiment, a capture108may comprise a flexible cable. So configured, the capture108may extend from a first mount156positioned on one side of a brake assembly20to a second mount158positioned on the other side of the brake assembly20. The engagement between the capture108and one mount156may be substantially permanent, while a release mechanism160(e.g., quick release hook, carabiner, or the like) may provide selective engagement between the capture108and the other mount158.

In certain embodiments, a brake pad88may be formed as a monolithic and homogeneous unit. For example, a brake pad88may be formed as a single, seamless piece of a non-elastic material (e.g., UHMWPE). Alternatively, a brake pad88may include various other segments89or inserts89selectively providing additional control over braking characteristics. A pivot bolt162may pivotably secure the brake pad88to the frame14. If desired or necessary, a brake assembly20in accordance with the present invention may include an adjustable stop164. In some embodiments, the adjustable stop164may provide a selectively adjustable limit on the pivoting of the brake pad88. In other embodiments, the adjustable stop164may dictate the angle at which the brake pad88may contact a cable12.

Referring toFIG. 15, in selected embodiments, one or more captures108may be used to secure a brake assembly20to a cable12. If desired, one or more captures108may be positioned to maintain a brake assembly20in abutment with the cable12. For example, a capture108may be positioned such that the brake pad88and one or more slides110simultaneously contact a cable12. The various slides110may be formed of various materials (e.g., materials such as those used in a brake pad88) to provide a desired composite sliding or braking effect. Such an arrangement may provide additional control over the motion of the trolley10with respect to the cable12.

In certain embodiments, a capture108may be formed of an elastic material to provide a degree of control over the normal force128applied thereby. In one embodiment, a capture1087may be formed of an elastic band material formed with various apertures165. Mounts158may be configured as extensions or posts extending (e.g., in a lateral direction11b) from the cheek plates96. Accordingly, the apertures165in the capture108may be placed over the mounts158to secure the capture108to the rest of the brake assembly20.

Additionally, by selecting which aperture165is applied to which mount158, a user may control the slack between the slides110and the cable or, alternatively, the tension in the capture108pulling the slides110into contact with the cable12. The normal force128may thus be increased sufficiently to hold the trolley10in place on the cable12both during application of the trolley10the cable12and securement of a user to the trolley10. The effect of the capture108may thus bias the cable12against the brake pad88, hold the trolley10in place, provide additional braking effect in operation, or some combination thereof. In practice, ten to twenty pounds of braking force is readily achieved by manually tensioning a pair of captures108. On portions of a cable12having little declination, the captures108may be loosened or released to eliminate their braking effect.

Moreover, by tensioning the capture108sufficiently to prevent motion of the trolley10along the cable12, a user may not have to contend with the trolley10sliding along the cable12as the user is attempting to properly apply weight34to the frame14. This may provide more precise control of movement of the trolley10at all times, particularly on portions of the cable12at steep angles (e.g., greater than 30 degrees) or in close quarters near suspended chairs or gondolas being serviced.

Referring toFIG. 16, trolleys10in accordance with the present invention may be used as the basis for an amusement or thrill ride. One of the potential hazards of a ride employing trolleys10in accordance with the present invention is the possibility of collision. For example, a first rider may ride a first trolley10to some location along a cable12. Assuming that the first rider has reached the bottom and exited the ride, a second rider may ride a second trolley10down the same cable12. Accordingly, if the first rider did not actually reach the bottom, serious injury may occur when the second rider collides with the first rider. While communication between finish area operators, or sensors thereat, and start area operators, or sensors thereat, may reduce the risk of such collisions, the possibility of miscommunication or malfunction permits some risk of collision to remain.

Also, for amusement rides, revenue may largely depend on the number operators employed to operate the ride and the number of users served within a given period of time. Accordingly, revenue may be increased in various ways. For example, a plurality of cables12may be employed. Additionally, the rate at which each cable is utilized may be increased. That is, the method for circulating trolleys10(i.e., transporting trolleys10from the finish area back to the start area) may be optimized. Also, the number of operators may be minimized.

In view of the foregoing, a trolley retrieval system166in accordance with the present invention may be configured to maximize user throughput, minimize operator interaction, and eliminate the risk of collision. In selected embodiments, a system166may include multiple (e.g., four) cables12held in suspension between first and second supports. A retrieval line168may be suspended in a closed loop extending from proximate a start area170to proximate a finish area172. In general, the start area170may correspond to the first or upper support, while the finish area172may correspond to the second or lower support. A motivator174may selectively circulating the retrieval line168around the loop. A controller176may control operation of the motivator174.

In selected embodiments, a controller176may include a processor178and one or more end-of-travel sensors180sensing when a trolley10nears the start area170. The sensors180may be operably connected to the processor176to appropriately pass thereto a stop signal informing the processor176that one or more of trolleys10is sufficiently near the start area170. The processor176may be programmed to issue, in response to the stop signal, a stop command causing the motivator174to cease circulation of the retrieval line168. The processor176may be further programmed to issue, in further response to the stop signal, a reverse command causing the motivator176to circulate the retrieval line168in an opposite direction when it resumes circulation the retrieval line168. A controller176may further include a retrieval switch182operably connected to cause, when activated, the motivator174to resume circulation of the retrieval line168. The retrieval line168may travel down with a user or simply disconnect to be reconnected only when retrieval is needed. Thus, movement of the retrieval line168may be continuous in a loop of a constant sense of direction.

At the finish area172, each cable12may include arresting equipment184. Arresting equipment167may include whatever structures are necessary to safety slow a trolley10and associated user to a stop. In selected embodiments, the arresting equipment184may include terminal brake acceptors (e.g. receiver or actuator), springs, and weights as disclosed in U.S. Pat. No. 6,622,634.

In certain embodiments, a retrieval system166may include a plurality of sheaves186cooperating to hold the retrieval line168in suspension. If desired, each sheave186a,186b,186c, and186dof the plurality of sheaves186may be connected to one of the first and second supports. Accordingly, the retrieval line168may be suspended in the same catenary form or angle as that of the various cables12. Also, the sheaves186may define the loop about which the retrieval line168may circulate or travel. In selected embodiments, different legs or portions188of the retrieval line168may serve different cables12during operation. For example, in a four cable embodiment, a first leg188aof a retrieval line168may be positioned to serve two cables12a,12b, while a second leg188bof the retrieval line168may be positioned to serve the other cables12c,12d.

In certain embodiments, a retrieval line168may be formed of any suitable material. In one embodiment, a retrieval line168may be formed of a relatively lightweight, synthetic polymer rope. If desired or necessary, a retrieval line168may include one or more swivels190relieving twisting imposed thereon or generated therein. Various interface mechanisms192(e.g., carabiners, loop reinforcements, or the like) may provide the interface between the line168and the swivels190. In selected embodiments, the swivels190or interface mechanisms192may provide a location at which a trolley10may connect to or engage the retrieval line168. Additionally, the swivels190and interface mechanisms192may provide break points supporting replacement of certain portions of the retrieval line168should wear so dictate.

In selected embodiments, a motivator174may include a motive source194coupled to a line engagement system196. In certain embodiment, a motive source194may provide rotation to the line engagement system196, which, in turn, may induce movement (e.g., circulation) of the retrieval line168. In one embodiment, a motive source194may comprise an electric motor. In such an embodiment, the motivator174may further include a polarity switch switching, in response to the reverse command, the polarity of the current supplied to the electric motor. The motive source194may operate in a single direction such that the retrieval line168loops continuously. Thus, the upward leg of the retrieval line168corresponds to retrieval of a harness or seat unit, and the downward leg “deadheads” back to the finishing location for a new pickup. In such an arrangement, links for connecting to harnesses or seats may be removable from the line168.

Referring toFIG. 17, a line engagement system196may include any structures effectively translating motion of the motive source192into motion of the retrieval line168. In certain embodiments, a line engagement system196may include a first bank of sheaves198rotating about a first axis200and a second bank of sheaves202rotating about a second axis204, spaced from and parallel to the first axis200. The retrieval line168may be reeved between the first and second banks of sheaves198,202. The motive source194may provide rotation (directly or appropriately “geared”) to the first bank198, the second bank202, or both. In such an arrangement, the surface area between the line168and the sheaves may be selected to be sufficient to provide adequate frictional engagement therebetween.

Referring toFIG. 18, in operation, a method206in accordance with the present invention may begin with the selection208of a system166comprising one or more cables12held in suspension between first and second supports and a trolley10positioned to travel along each cable12. In selected embodiments, one trolley10may be assigned to each cable12and remain secured thereto. So configured, the possibility of collision is eliminated as only one trolley10is ever applied to a cable12in such a system. Thus, unless and until a trolley10is retrieved (circulated from the finish area172bak to the start area170), no new riders will be sent down that cable12.

Once an appropriate system166has been selected208, a user may be connected210to the trolley10. In selected embodiments, connecting210a user to a trolley10may include positioning and securing a user within a harness or seat suspended from the trolley10. Following securement210of a user in the harness, the trolley10may be released212to travel along the cable from proximate the first support (i.e., the start area170) to proximate the second support (i.e., the finish area172). At the finish area170, the user may be disconnected214from the harness. The trolley10and harness may then be connected216to a retrieval line168for the return trip.

A trolley10may be connected216to a retrieval line168by any suitable method using any suitable structures. In one embodiment, a trolley10may include a tether connected thereto. A first end of the tether may connect to the harness suspended from the trolley10. A second end of the tether may include a quick-release hook (e.g., carabiner) providing rapid engagement with a swivel190or interface mechanism192of a retrieval line168. When the first end of a tether is pulled (e.g., by the retrieval line168), the tether may lift the harness up toward the trolley10. Once the harness cannot be lifted further, additional pulling of the tether may induce travel of the trolley10along the cable12. By cinching or lifting the harness, the tether may reduce air drag as the trolley10is circulated back to the start area170. Also, lifting the harness may reduce flopping and whipping of the harness during travel. Furthermore, lifting the harness may facilitate passage of the harness over obstacles such as a starting gate positioned at the start area170.

Once a trolley10connected216to a retrieval line168, the motivator174may be activated218to draw the trolley10along the cable12from proximate the second support (i.e., the finish area172) to proximate the first support (i.e., the start area170). When one or more of the trolleys10connected216to a retrieval line168activates an end-of-travel sensor180, the motivator174may stop the retrieval line168. The trolley10or trolleys10may then be disconnected220from the retrieval line168and secured or prepared for future use210.

As stated hereinabove, in selected embodiments, a processor176may be programmed to issue, in response to a stop signal, a reverse command causing the motivator176to circulate the retrieval line168in an opposite direction when it resumes circulation the retrieval line168. So configured, the engagement locations (e.g., swivels190, interface mechanisms192) between a retrieval line168and a trolley10may be securely or even permanently attached and travel in a cycle from the starting area170to the finishing area172and back. Alternatively, interface mechanisms may be clamped and removed readily so the line168may travel with only a loop of one “sense” of direction only.

Moreover, while one engagement location is stopped at the starting area170, another may be stopped at the finish area172. Accordingly, in selected embodiments, while one or more trolleys10are being loaded210with users, other trolleys10may be connected to a retrieval line168. Also, while one or more trolleys10are pulled from the finish area172to the start area170, other engagement locations on the retrieval line168may be returned to the finish are172to continue the cyclical pattern. So configured, a trolley retrieval system166in accordance with the present invention may provide a substantially continuous throughput, minimize operator interaction, and eliminating the risk of collisions.

Referring toFIG. 19, a retrieval system166in accordance with the present invention may be configured to service any number of cables12. Scaling of such a system116may occur in at least one of two ways. First, multiple loops may be created in a single retrieval line186. Accordingly, for a system166serving six or eight cables12, a retrieval line168may include four legs188or portions188. Each such leg188may be positioned to service at least one cable12. For example, certain legs188a,188dmay service two cables12a,12band12e,12f, respectively, while other legs188b,188cmay service one cable12c,12d, each, respectively. Second, a retrieval system166may include various subsystems, each in itself being an independent yet cooperative retrieval system166.

Referring toFIGS. 20-22, an upper or lower support224for suspending a cable12may be configured in any suitable manner. In selected embodiments, a support224may perform at least three functions, namely anchoring, positioning, and tensioning a cable12. In one embodiment a support224may include a tower226positioning a cable12at a desired height228above the ground230or other supporting surface230. A tower226may include a sheave232suspended from a sheave mount234to engage and support the cable12. The height228of the cable12may be controlled by altering the height of the tower226, by altering the length of the sheave mount234, or by some combination thereof.

After passing over the sheave232of a tower226, a cable12may extend to an anchor assembly236. In selected embodiments, an anchor assembly236may include one or more sheaves238to redirect the cable12, one or more cable clamps240, and a wrapping post242. In one embodiments, an anchor assembly236may be arranged such that a cable12may pass under a sheave238a, through a cable clamp240, and wrap around a wrapping post242.

In certain embodiments, a tension assembly244may be positioned between a tower226and an anchor assembly236. A tension assembly244may deflect the cable12to cause relatively fine adjustments to the tension or suspension shape of a cable12. In one embodiment, a tension assembly244may include a sheave246positioned to capture the cable12. The sheave246may be connected to an adjuster248. Accordingly, changes in the length of the adjuster248(e.g., decreases in the length of the adjuster248) may deflect the cable12from its path otherwise. The greater the deflection of the cable12, the greater the increase in tension, the flatter the suspension shape of the cable (e.g., less sag between supports226), or both.

In selected embodiments, changes in length of an adjuster248may be manually induced. Alternatively, changes in length of the adjuster248may be automatically calculated and applied to periodically or continuously adjust cable tension (e.g., to compensate for changes in length of the cable12due to changes in temperature and the like). In certain embodiments, an adjuster248may be a hydraulic ram.

If desired or necessary, one or more supports250may extend between a tower226and an anchor assembly236. Such supports250may increase the strength and rigidity of the support224. Additionally, such supports250may facilitate the transfer of loads imposed on the various structures226,236to underlying foundation.

A support224in accordance with the present invention may be positioned at either end of the cable12. In certain embodiments, a tension assembly244may be positioned at only one end of a cable12. Alternatively, when greater adjustment capacity is desired, a tension assembly244may be positioned at each end of a cable12.

During installation and initial suspension of a cable12, significant slack of the cable12must be appropriately consumed before the cable12may be secured or “tied off.” In selected embodiments, an anchor assembly236may support rapid consumption of slack cable12. For example, in selected embodiments, an anchor assembly236may include a first sheave238areceiving cable from a tower226. The cable12may pass from the first sheave238a, through a cable clamp240, past a wrapping post242, to a second sheave238b. In one embodiment, the various components238a,238b,240,242of the anchoring assembly236may be secured to an anchor plate252, which, in turn, may secure to an appropriate foundation.

After passing through the second sheave238b, a cable12may be pulled254in a variety of directions. If desired, the slack of a cable12may be pulled254through an anchoring assembly236by a tractor. Thus, the variety of directions at which the cable12may be pulled254may allow the tractor to selected the best route for accomplishing the task.

Moreover, once a cable12achieves a desired suspension shape, pulling254of the cable may cease and the cable clamp240may be tightened. Once the clamp240is secured, the cable12may be appropriately cut and wrapped around the wrapping post242. Once the cable12is tied off, the clamp240released. The cable12will remain in the desired configuration, as transitioning from clamp240to wrapping post242requires no guess work or estimates as to how the shape of the cable12will change once the temporary securement is released.

In selected embodiments, a tractor or the like may not provide sufficiently fine adjustment of the suspension position of a cable12. In such embodiments, a tractor or the like may draw or “consume” the bulk of the slack, while leaving the fine tuning of the suspension to an adjuster248. That is, before an adjuster248is fully incorporated into a tension assembly244, the adjuster248may be fitted with a clamp to engage a cable12. The adjuster248may then incrementally, and with significant precision, pull254the cable12to a desired suspension shape. Alternating engagement between the cable clamp240of the anchor assembly236and the clamp associated with the adjuster248, the adjuster248may take multiple “bites” or pulls at the cable12. Again, once the cable12is properly positioned, pulling254of the cable may cease. The cable clamp240may be tightened and the cable12may be appropriately cut and wrapped around the wrapping post242.

In selected embodiments, once installation of a cable12is complete, the second sheave238band cable clamp240may be removed (e.g., unbolted). If desired, the components238b,240may be re-used on other anchoring assemblies236to facilitate installation and initial suspension of other cables12.