Abstract: A dual hoist crane is provided with a heave compensation system that can be used for both the main and for the auxiliary hoisting assembly. The heave compensation system includes a first set of sheaves for guiding the main hoisting cable and a second set of sheaves for guiding the auxiliary hoisting cable. The heave compensation system is configured to individually lock the first set of sheaves and the second set of sheaves to a heave compensation cylinder, for respectively providing the main hoisting assembly and the auxiliary hoisting assembly with heave compensation.

Abstract: An energy dissipation device includes an inner tube, a core tube, an outer tube and a fixing member. The inner tube includes a first protruding structure. The core tube includes a second protruding structure, and the core tube is sleeved outside the inner tube. The outer tube is sleeved outside the core tube. The fixing member is connected to the inner tube, the core tube and the outer tube.

Abstract: The present drywall installation tool is configured to facilitate the installation of interior panels such as drywall, plywood or any applicable material on horizontal and vertical framed surfaces and to avoid the necessity of having more than one person to install each drywall panel and without using the floor as a supportive base for the installation tool.

Abstract: The drywall sheet lifting device comprises a lower frame and an upper frame. The lower frame may comprise a set of wheels to allow the drywall sheet lifting device to be moved into position. The lower frame may comprise telescopic joints in the side supports and hinged joints in the front and rear support to permit reduction of size of the lower frame for storage and transportation purposes. The upper frame may be coupled to the lower frame via two uprights. The upper frame may comprise a plurality of center braces to support a sheet of drywall. The upper frame may comprise a plurality of stop plates to prevent the sheet of drywall from sliding off. The upper frame may pivot between a first position for loading and a second position for installing. The upper frame may be raised or lower via telescopic joints in the uprights.

Abstract: An adjustable, extendable beacon mount for a wireless communication or transmission tower. The mount mounts a beacon and allows the beacon to be raised and lowered as needed. The mount includes a lower weldment assembly with a base element and an upper weldment assembly to which a beacon is mounted. The upper weldment assembly is raised and lowered by a hand-cranked lever which activates a gear and, in turn, a ratchet pawl engages receiver notches on the upper weldment assembly, raising and lowering the upper weldment assembly. Alternatively, the hand crank could be replaced with an electric motor or other alternatively powered element to raise and lower the upper weldment assembly. The purpose is to raise the beacon above the communications or transmission antennas surrounding the top of a tower to provide a 360 degree unobstructed view for passing aircraft.

Abstract: The invention provides a pole lifting apparatus. The pole lifting apparatus including a base section having a base plate; one or more mast sections connected to the base section and extendable in an axial manner therewith, wherein an uppermost mast section of the one or more mast sections comprises a pulley mounted at its uppermost end; and a hoist secured to the base section and having a wire rope operably associated with the one or more mast sections and pulley for use in a pole lifting operation.

Abstract: In certain embodiments, a tower lifting system comprises a primary lifting system and a secondary lifting system. The primary lifting system includes a lift cap configured to support a tower section to be lifted, the lift cap having a first plurality of hoists, and a lift pole coupled to the lift cap, the lift pole having a lifting mechanism configured to lift the lift cap, the lift pole, and the tower section to be lifted from within a previously lifted tower section. The secondary lifting system comprises a second plurality of hoists configured to raise the tower section to be lifted to the lift cap from a tower foundation.

Abstract: What is proposed is a transforming cargo trailer system of which the basic embodiment is an enclosed box trailer that is built small and light enough to be towed behind a medium size motorcycle. The enclosed box trailer embodiment is comprised of a convertible cargo box, a frame assembly, a pair of suspension assemblies, an axle assembly, an air supply system, and means for adapting, reducing or transforming the enclosed box trailer embodiment into a toy hauler trailer embodiment, a common wagon box trailer embodiment, a flat-bed trailer embodiment, and a raised platform embodiment. Also, the enclosed box trailer embodiment can also be built in a large variety of models that can be utilized for a large variety of applications.

Abstract: A multi purpose hoisting device for use on a floating vessel having a deck, including: a load bearing structure to be mounted on the vessel; a main hoisting mechanism for raising/lowering an object above the deck and including: at least one main hoisting winch; an upper cable pulley block supported by the load bearing structure; a travelling cable pulley block; a main hoisting cable associated with the at least one main hoisting winch and passed over pulleys of the upper cable pulley block and of the travelling pulley block in a multiple fall configuration, such that the travelling cable pulley block is moveable relative to the load bearing structure by using the at least one main hoisting winch; a main hoist heave compensation mechanism associated with the main hoisting cable for damping the effect of sea-state induced motion of the vessel onto an object supported by the main hoisting cable.

Abstract: A hoist safety lock mechanism includes a pair of pawls formed on terminal ends of each corner of a pallet support structure. The pawls are biased outward to an extended position and include a lower support surface adapted to rest on a support surface. The pawls may be pivotally deflected downward (but not upward) due to impact on a top surface of the pawl. Each pawl is configured to be received within a respective parallel column of slots formed on inwardly-facing sides of the vertical posts forming the lifting frame of the hoist. The slots within each column are vertically offset and separated by separators which can vertically deflect the pawls. Because the slots are vertically offset, and because each terminal end includes a pair of pawls, there is always at least one pawl engaged within the slot even if the other of the pair is deflected by contact with a separator. Thus, any failure of the hoist will cause the pallet support structure to only fall to the next lower separator before the pawl catches it.

Abstract: Described herein is a safety restraint mechanism for a mast assembly. The safety restraint mechanism comprises a tension line attached to a lever and a winch mechanism such that operation of the winch mechanism translates a carriage assembly along the mast. A cam brake including an engagement profile at a first end thereon is pivotally attached to the lever at a second end. The cam brake is also pivotally attached to the carriage assembly such that the engagement profile pivots into a brake position or a free lift position relative to a tension force acting on the lever. The lever is pivotally attached to the second end and includes a kickstand. The engagement profile having a protruded portion to abut the tubes in a brake position and a relief portion to space the cam brake from the tubes in a free lift position.

Abstract: Described herein is a safety restraint mechanism for a mast assembly. The safety restraint mechanism comprises a tension line attached to a lever and a winch mechanism such that operation of the winch mechanism translates a carriage assembly along the mast. A cam brake including an engagement profile at a first end thereon is pivotally attached to the lever at a second end. The cam brake is also pivotally attached to the carriage assembly such that the engagement profile pivots into a brake position or a free lift position relative to a tension force acting on the lever. The lever is pivotally attached to the second end and includes a kickstand. The engagement profile having a protruded portion to abut the tubes in a brake position and a relief portion to space the cam brake from the tubes in a free lift position.

Abstract: A wind turbine tower cleaning or coating apparatus is provided. The apparatus includes a frame which circumferentially extends at least partially around a wind turbine tower. A separator structure can be attached to the frame and extends between the frame and the wind turbine tower to position the frame at a predetermined distance away from the wind turbine tower. The separator structure can also include an attachment end which is attached to the frame and a slidabe end positionable near the wind turbine tower. A slider can be attached to the slidabe end of the separator structure and can slide on the surface of the wind turbine tower as the frame is raised and lowered on the wind turbine tower. A frame lift device can raise and lower the frame on the wind turbine tower. A plurality of sprayers can be positioned circumferentially along the frame and configured to selectively spray fluid onto the wind turbine tower.

Abstract: A wind turbine tower cleaning or coating apparatus is provided. The apparatus includes a frame which circumferentially extends at least partially around a wind turbine tower. A separator structure can be attached to the frame and extends between the frame and the wind turbine tower to position the frame at a predetermined distance away from the wind turbine tower. The separator structure can also include an attachment end which is attached to the frame and a slidabe end positionable near the wind turbine tower. A slider can be attached to the slidabe end of the separator structure and can slide on the surface of the wind turbine tower as the frame is raised and lowered on the wind turbine tower. A frame lift device can raise and lower the frame on the wind turbine tower. A plurality of sprayers can be positioned circumferentially along the frame and configured to selectively spray fluid onto the wind turbine tower.

Abstract: A channel member, a modular floor structure, and a method capable of positioning an object on a substantially planar surface is disclosed. Movement of a movable band within an interior channel of the channel member permits movement of an object outside of the interior channel.

Abstract: A lifting device has a lifting track mounted on a wall and a carriage with a lift frame movable along the track. A dolly with wheels at opposing ends is arranged to support various cargo thereon including personal vehicles such as motorcycles or snowmobiles or other comparably sized objects. The lift frame of the carriage has lift forks arranged to be received a wheel track of the dolly which receives wheels of a personal vehicle thereon. Guide flanges alongside the lifting track are engaged by upper and lower guide followers to prevent binding of the lift frame along the lifting track. The dolly includes longitudinal rails mountable at different lateral distances to accommodate different vehicle wheel configurations.

Abstract: The invention relates to silk or other materials formed to have predetermined contraction/relaxation characteristics, wherein the contraction/relaxation characteristics are initiated by exposure thereof to predetermined humidity characteristics in the adjacent atmosphere. The materials may comprise a single silk fiber, a bundle of fibers of a predetermined size or diameter, a meshwork of fibers forming a predetermined configuration such as one or more sheets, bundles or other bodies. In this manner, the material can be scaled across a size range of any desired magnitude to produce predetermined force and/or displacement characteristics in association therewith.

Abstract: A device for using technical equipment underwater includes at least one guide rail configured to extend vertically underwater on an edifice from above a waterline. At least one device carriage is provided and includes a basic unit having a reception flange configured to couple the technical equipment thereto, and at least one running unit that abuts against the guide rail via guide rollers. A press-on unit is disposed on a first side of the device carriage and includes a lever pivotable on an axis of the device carriage so as to generate a pressing force of the device carriage against the guide rail. The lever includes a support roller at a first end and a weight packet at a second end so as to exert a downward drifting force underwater that is greater than a buoyancy of the device carriage. At least two spacers are each disposed at a first end on the at least one device carriage and abutting the edifice at a second end.

Abstract: The present invention which relates to the field of offshore wind turbine installation technology, discloses a wind turbine holding and lifting system for a movable operating platform above water. The wind turbine holding and lifting system comprises a first standing column, a second standing column, a beam lifting device, no less than one beam and enclasping means for holding the wind turbine tower; the first standing column and the second standing column are juxtaposed, and the opposed faces of the first and second standing columns are provided with guiding grooves for sliding the beams; the enclasping means is arranged on the beam, and the two ends of the beam are interfitted within the guiding grooves of the first and second standing columns; the beam lifting device is fixed to the first or second standing column, and the lifting end of the beam lifting device is connected to the beam.

Abstract: The invention relates to a carrier device for a hose packet 5 of supply lines of a working robot. The hose packet 5 is secured by the intermediary of a compensator 6 to a carrier element 7, which can be lowered from a high operating position above the working robot 4 into a lower maintenance position at floor level by way of traction means. Thanks to the compensator 6, in the operating position the hose packet is on the one hand held high, but, on the other hand, can also give when force is applied.

Abstract: A winch system with a force cable that transmits electrical current and/or digital data to the load. For example, the force cable, including a power line and/or a signal line and includes at least: (i) a first portion extending from the load to the drum; and (ii) a second portion that is wound around the drum. If there is a power line in the force cable it is electrically connected to an electrical commutator by a rotating current path. If there is a signal line in the force cable it is connected in data communication to a data signal commutator by a rotating communication path. The commutator also has an input for receiving electrical current and/or digital data, as appropriate. The commutator transmits the electrical current and/or digital data from its input to the rotating current path and/or communication path. The drum defines an axial channel extending from at least one end of the drum along its axial direction, and current path(s) and/or communication path(s) are routed through the channel.

Abstract: A pulling apparatus includes an input portion configured to be operated, a braking portion configured to apply a braking force to the input portion to generate a resistance force against to an operation to the input portion, a pulling portion configured to pull a pulling member, a pulling order generation portion configured to generate a control order signal to the pulling portion such that the pulling member is pulled by the pulling portion in accordance with an operation to the input portion, a pulling amount detecting portion configured to detect pulling amount of the pulling member, a pulling amount increase and decrease determination portion configured to determine an increase and decrease in the pulling amount detected by the pulling amount detecting portion, and a braking control portion configured to control the braking portion in accordance with a determination result obtained by the pulling amount increase and decrease determination portion.

Abstract: The Cableveyor may be able to support its own weight in the direction of gravity since the Cableveyor having the bent portion that connects between the straight-moving unit and the rotating unit is arranged so that it bends in a horizontal plane. As a result, the Cableveyor and the maintenance member do not collide, thus collision noise or dust caused by the collision can be suppressed. Moreover, since the Cableveyor is arranged to the side of the straight axis, the height size of the robot can be suppressed compared with the composition that arranges the Cableveyor on the upper surface of the straight axis.

Abstract: A lifter is constructed to include a hollow main upright, a frame pivoted to the main upright to carry a hand winch, a link coupled between the frame and the main upright, a hollow auxiliary upright axially movably mounted in the hollow main upright, a lifting upright axially movably mounted in the hollow auxiliary upright, two first pulley blocks coupled between the hand winch and the hollow auxiliary upright and adapted to lift the hollow auxiliary upright upon operation of the hand winch, and two second pulley blocks coupled between the hollow main upright and the lifting upright and adapted to lift the lifting upright upon operation of the hand winch after the hollow auxiliary upright has been extended out of the hollow main upright.

Abstract: The invention is a hoist system for a derrick with a derrick inside, a derrick outside, and a derrick top side; a splittable block connected to the derrick top side; a hoisting cable guided through the splittable block; a moveable trolley with a trolley top side and a trolley bottom side, wherein the trolley is connected to the splittable block and wherein the moveable trolley is removably secured on the derrick; and a hoist winch adapted to pull the hoisting cable over the derrick top side and through the splittable block to move the moveable trolley relative to the derrick.

Abstract: A hand trolley includes a chassis formed from side frames comprising parallel frame members, wheels and a base platform provided with a load lifting carriage having a lifting surface. The carriage can be raised from a low position on the base platform to an elevated position by operating a hand cranked winch with a crank handle rotatable about an axle located proximate to a hand grip on the chassis rails and parallel to the axis of the wheels. The positioning and orientation of the crank handle allows correct ergonomic use by an operator who can grip the trolley chassis with one hand while controlling and operating the crank handle in an ergonomically sound position.

Abstract: A load carrier for supporting, raising or lowering a load includes a frame member, a telescoping mast, and a support frame. The frame member is adapted for being movably supported by a rail. The telescoping mast is supported by the frame member, with the support frame supported by the telescoping mast. The telescoping mast includes at least one fixed mast section and at least one movable mast section, with the support frame being coupled to the movable mast section. The movable mast section is supported for movement between a plurality of extended positions in which the support frame is lowered and raised with respect to the frame member and the fixed mast section with the movable mast section being guided by the fixed mast section when the movable mast section is moved to its extended position. The driver selectively moves the movable mast section to its extended position and includes at least one cord for raising and lowering the movable mast section.

Abstract: A lift assembly includes first and second elevator structures, each including a first scissors section, a second scissors section pivotally connected to the first scissors section and supporting a lift shaft which extends between the first and second structures, at least one intermediate scissors section pivotally connected to the second scissors section, and an upper scissors section pivotally connected to an uppermost of the intermediate scissors sections and supporting a top bar. First and second side plates upstand adjacent the first and second structures, each having therein an elongated slot, the lift shaft being disposed in the slots. A lower pulley is mounted proximate each of the base bars on a common drive shaft. An upper pulley is mounted proximate an upper end of each of the side plates. A strand extends from each of the lower pulleys to each of the upper pulleys, and thence to the lift shaft.

Abstract: A portable motorcycle hoist has a main frame assembly which includes a pair of vertically-oriented parallel channel beams rigidly affixed to both an upper cross brace and to a base member. The pair of channel beams provide a caged track for a trolley which is movably slidable therein between a lowermost position and an uppermost position. The trolley is fitted with a plurality of guide wheels to minimize sliding friction within the caged track. A cradle assembly, adapted to support a motorcycle beneath its engine, is attached to the trolley. Attachment may be made with welds, threaded fasteners, or other suitable means. The base member may be unitary, or it may be partially disassemblable to facilitate transport and storage. The base member may also incorporate casters to facilitate the repositioning of a supported cycle.

Abstract: A drive, preferably a gate drive with a belt transmission encompassing a drive pulley and an output pulley. According to the invention the drive pulley consists of at least one cylinder with inwardly tapering flanges at its ends. A round belt, rope or similar serves as a drive agent, which is wound a number of times around the cylinder. The return strand of the round belt, rope or similar can be held continuously under tension.

Abstract: The present invention is a base station that may be adjusted to varying altitudes along a vertical support but will not temporarily suspend wireless communications services to all mobile telephones within its associated cell when being serviced. In one embodiment, the base station of the present invention comprises a plurality of micro-cells and a plurality of independently moveable carriages. Each of the plurality of micro-cells being associated with a sector of a cell, and comprising a radio unit and a directional antenna for providing wireless communications services to mobile telephones within the associated sector. Each of the micro-cells are mounted to one of the plurality of carriages, which are independently and moveably mounted to a vertical support.

Abstract: An apparatus for a derrick, comprising two or more hydraulic piston-cylinder arrangements (10, 11) for raising and lowering a yoke (8) which travels on guide rails (7) in the derrick (1) itself, where two or more wire lines (13) are strung over sheaves (12) rotatably attached to the yoke. The wire lines (13) are attached at one end thereof to the top drive (9) and at the other end thereof are secured to an attachment point (14a, 14b) adjacent to a drill floor (2), said two or more wire lines being run in two sets (13a, 13b) of lines. The attachment points (14a, 14b) for each wire set are connected to a tension equalizer assembly to equalize differences in tension in the wire lines.

Abstract: A portable apparatus for raising and lowering a load vertically along a substantially vertical structure. The apparatus comprises a vertical guide, which is secured to the substantially vertical structure by a retainer. A carriage is movably attached to the vertical guide and a platform which supports the load is attached to the carriage. The carriage is raised and lowered along the vertical guide by some means whereby the load is raised and lowered along the vertical guide. The carriage also comprises a safety brake for immobilizing the carriage with respect to the vertical guide when the means for raising and lowering the carriage is inoperative or malfunctions. The apparatus further comprises wheels rotatingly attached to the bottom of the vertical guide and a hitch attached to the top of the vertical guide, such that the entire device may be towed behind a vehicle.

Abstract: A basketball goal and pole is provided of the type permitting the height of the basketball goal above a playing surface to be adjusted. The adjustable basketball goal comprises: a vertical pole having a plurality of rails formed on the outside thereof running along the longitudinal axis of the pole, a crank assembly having a rotatable reel fastened to the pole beneath the rails, a pulley assembly having a grooved wheel fastened to the pole atop the rails, a collar having an interior surface forming trackways slidably mounted on the rails and movable between the crank assembly and the pulley assembly, a basketball goal extending upwardly and outwardly from the collar, and a cable connected to the reel and threaded over the grooved wheel and connected to the collar for moving the collar between the crank assembly and the pulley assembly.

Abstract: An actuating device intended for spacially moving a mobile part in relation to a fixed point, characterized in that it includes a motor (1) driving, around its shaft (2), a winding element (4) pulling a mobile lifting element (9) connected to a fixed point (22) used as anchoring point for the flexible element (4) and sliding, perpendicularly to the axis of the thus constituted pulley block mechanism, in a tube-shaped guide (15) inside which it is housed and compressing a return spring (10) ensuring the return in extension of the mobile element (9), in such a way that this device works in traction and without any buckling stresses.

Abstract: A pipeline is forced into a borehole using a deadman disposed directly in front of the entry to the borehole. A force is generated between the deadman and a collar attached to the pipeline such that the pipeline is forced through the deadman into the borehole. The force may be generated by a cable and sheave combination or through hydraulic cylinders.

Abstract: A boat support framework including an elevating cradle supported between a plurality of cable and pulley containing lift towers via a plurality of roller bearings in engagement therewith. A cable take up axle includes separate cable drums and cables to each lift tower and is controlled from a handwheel or winch operated articulating drive arm and multiple endless chains coupled therebetween. Hinged frameworks pivotally coupled to cross frame members of a base frame and the cradle articulate to support the cradle over the range of lift travel.

Abstract: A safety device for a lifting apparatus, said lifting device having a carriage member (12) guided in a column (14) said carriage member (12) selectively positioned with respect to said column member (14) by a flexible tension member (20) connected to a drive means (22); a pawl member (34) is disengaged from an elongated rack (62) by a predetermined tension in the tension member (20); A reduction in the predetermined tension in the flexible tension member (20) will automatically engage the pawl member (34) into the rack member (62) by the urging of a biasing member (56) preventing any uncontrolled movement of the carriage relative to the column.

Abstract: A portable cable hoist mechanism is provided which incorporates a wheel mounted base structure having base legs that are capable of being unlocked and folded or otherwise moved to an out-of-the-way position for storage or handling. The base forms a framework to which the extendible base legs are movably secured. Latch members fixed to each of the base legs are projected through latch receptacles in the base framework when the base legs are fully extended. Locking elements establish locking engagement with the respective latch elements to secure the base legs at the extended positions thereof.

Abstract: A portable plural telescoping mast cable hoist mechanism is provided which incorporates a single cable for telescopically extending and retracting the mast sections and for controlling movement of a load handling carriage. A carriage lock mechanism is provided to prevent inadvertent movement of the carriage and movable mast sections while the cable hoist mechanism is being transported or otherwise moved about while positioned on its side. The carriage lock mechanism incorporates a freely pivotal carriage lock having a hook at its lower end which is normally positioned out of locking engagement with a locking pin and which is pivoted by gravity into locking engagement with the locking pin while the unit is lying on its side for transportation and handling, thereby securing the carriage and mast sections against inadvertent movement.

Abstract: A transfer system moves fuel assemblies along a track extending through a transfer tube within a containment wall in a nuclear power plant between the auxiliary building side and the containment building side. A car carries a basket for the assemblies. Two winches are located on the auxiliary building side above the water level existing over the track during refueling operations. The winches operate respective pairs of cables, driving the car in either direction. Four sheaves respectively direct the cables to the horizontal direction along the track. One pair of cables is secured to a yoke on the car to drive the car away from the containment building. Two horizontal sheaves are located near the containment end of the transfer tube. The other two cables extend horizontally along the track from the vertical sheaves to the horizontal sheaves, redirecting them to extend horizontally in the reverse direction. These return cables are secured to the yoke to drive the car toward the containment building.

Abstract: Fixed and traveling cable blocks along with first and second cable grip assemblies are supported adjacent the load to be lifted or lowered. A lifting/lowering cable is threaded through the cable grip assemblies before being secured to the load while a separate cable suspends the traveling block from the fixed block. By alternately closing one cable grip and opening the other, the load becomes movable upon the movement of the travelling block. Additionally, by closing the previously opened cable grip and opening the previously closed cable grip, the traveling block may be re-positioned or re-cycled while the load remains stationary. Upon such re-positioning, the lowering/lifting operation of the load can be repeated.

Abstract: Fixed and traveling cable blocks with first and second cable grip assemblies are supported adjacent the load to be lifted or lowered. A lifting/lowering cable is threaded through the cable grip assemblies before being secured to the load while a separate cable suspends the traveling block from the fixed block. By alternately closing one cable grip and opening the other, the load becomes movable upon the movement of the traveling block. Additionally, by closing the previously opened cable grip and opening the previously closed cable grip, the traveling block may be re-positioned or re-cycled while the load remains stationary. Upon such re-positioning, the lowreing/lifting operation of the load can be repeated.

Abstract: For acceleration of bodies along a track, a traction rope was wound onto a drum at the end of the track. During disengagement, the rope and the vicinity within range of the rotating rope were liable to suffer damage.The device according to the invention serves in particular for the catapult-launching of flying bodies. A winding drum driven by hydraulic motors is arranged below the point of maximum track velocity of the flying body and moves the latter along the longitudinal track until it reaches lift-off velocity. A flat traction ribbon connected to a carriage causes the winding drum to reverse its sense of rotation, so that the carriage is braked along a short stretch.The device can be mounted on a light truck and is electrohydraulically operated by the vehicle battery.

Abstract: Fixed and traveling cable blocks along with first and second cable grip assemblies are supported adjacent the load to be lifted or lowered. A lifting/lowering cable is threaded through the cable grip assemblies before being secured to the load while a separate cable suspends the traveling block from the fixed block. By alternately closing one cable grip and opening the other, the load becomes movable upon the movement of the traveling block. Additionally, by closing the previously opened cable grip and opening the previously closed cable grip, the traveling block may be re-positioned or re-cycled while the load remains stationary. Upon such re-positioning, the lowering/lifting operation of the load can be repeated.

Abstract: A carriage cooperates with a cable way machine with an oblique multigroove pulley and a friction drive drum, so oriented that the cable runs in straight directions off and onto circular grooves of the drum. One cable portion runs from the cable way machine through the carriage towards a fixed anchoring point, the remaining cable portion runs also through the carriage to a tension biasing anchoring point; function and configuration of a main cable and of a hauling cable are thus combined.

Abstract: A jack for supporting a ceiling beam is provided and consists of a pair of vertical sliding support members operated by a winch mechanism with cable which allows one person to set the beam. The jack will lift heavy loads eliminating the need for a crane and more manpower. In a modification the winch handle can be operated by a foot lever on base of the jack.

Abstract: A cable-driven arm-reciprocating system particularly useful for transferring nuclear fuel bundles from a nuclear reactor pool to a spent fuel storage pool, wherein an arm-retracting cable extends from a winch drum around fixed and movable-axis sheaves to a retracting anchor device and an arm-extending cable extends from the same winch drum also around fixed and movable-axis sheaves to an extending anchor device, each anchor device including spring means for maintaining and allowing for variations in cable tension.

Abstract: A tensioning device for use with an endless traverse which is longitudinally adjustable in both directions responsive to a rotational drive. The rotational drive includes two driving gears which are each selectively coupled with a drive shaft so that when one of the driving gears is positively driven, the other driving gear is permitted to rotate freely. The traverse changes from one driving gear to the other by passing from between a pair of overlying side walls and over a flange. Elongation resulting from strain of the traverse is continuously led out of the system so that blocking or braking of the traverse is avoided. The tensioning device is especially suitable for the operation of strip curtains or conventional curtains, as well as for curtain systems with large and heavy traverses.

Abstract: A telescopic device with two telescopic members (1, 2) comprises a control means with a flexible transmission element (4) for bringing the telescopic members in relative movement. The transmission element (10) is in engagement with a driving wheel (5), which is fixed relative to one (1) of the telescopic members in that the driving wheel is journalled at a base part (3) attached to said one telescopic member and from which the transmission element extends in a loop, which is arranged about a diverting wheel (8) arranged within a space limited by the telescopic members. The diverting wheel (8) is likewise fastened relative to the first telescopic member (1).