Abstract: A machine assembly for use in an elevator system is provided including a drive sheave (52) configured to rotate about a first axis of rotation (R). A first roller shaft (54) is configured to rotate about a second axis of rotation (S) substantially parallel to the first axis of rotation. Rotation of the first roller shaft about the second axis of rotation is configured to rotate the drive sheave about the first axis of rotation. A first motor is operably coupled to the first roller shaft and is configured to rotate the first roller shaft about the second axis of rotation.

Abstract: A lifting container power generating device using a flexible guidance system includes a power source section, a power transmission section and an electrical section. The power source section includes a slide recess base electrically connected to a top portion of a flexible lifting container. A body is connected to the slide recess base through a linear bearing. A fixed roller and a sliding roller on the body are symmetrically disposed at two sides of a guide wire rope. Under the combined action of a preloaded spring and a tension spring, the fixed roller and the sliding roller jointly press tightly against the guide wire rope. The power transmission section includes an electromagnetic clutch axially connected to the fixed roller, and an electromagnetic clutch pulley connected to a power generator pulley via a V-belt. The power source section includes an electrical cabinet connected to the electromagnetic clutch, a power generator and a battery of the flexible lifting container.

Abstract: A belt-type traction apparatus includes a herringbone toothed belt, which includes two edge parts and a center part between the two edge parts in a transverse direction of the herringbone toothed belt and connecting the edge parts in the transverse direction. The two edge parts and the center part each extend in a longitudinal direction of the herringbone toothed belt. The center part is associated with a first spring constant, the two edge parts are each associated with a second spring constant, and the first spring constant smaller than the second spring constant. Each edge part includes a tooth part and a support structure supporting the tooth part. Each support structure includes a plurality of reinforcement members extending in the longitudinal direction of the toothed belt.

Abstract: An elevator includes a drive, a car operatively connected to the drive to traverse along a travel path, at least one guide rail positioned along the travel path to guide the car, a safety brake arranged on the car to exert a braking force on the guide rail, and a safety system. The safety system includes a first safety control unit and a second safety control unit that monitor a safety condition of the elevator. The first safety control unit outputs a stop signal to the drive, in particular to a drive brake and/or to a frequency converter of the drive, and the second safety control unit outputs a trigger signal to the safety brake to bring the elevator into a proper safety condition when an impermissible safety condition of the elevator is detected.

Abstract: An example elevator system may include at least one elevator cage that is displaceable in an elevator shaft, a connection means that has a first elevator cage-side end and a second end, and a suspension disposed on the elevator cage. The connection means may include, for instance, a balance chain or belt. The first end of the connection means may be fastened to the suspension on the elevator cage. Further, the example elevator system may include a support unit that exerts a force on the suspension that counteracts a force acting on the suspension due to a mass of the connection means. The support unit may include a rope, a deflection roller, and a counterweight, wherein the rope is fastened to the counterweight and the suspension and is guided over the deflection roller.

Abstract: This invention is concerning a car suspending pulley device including a pair of beams provided parallel to each other on a lower portion of a car and a car suspending pulley arranged between the pair of beams and supported by the pair of beams. A weight suspending pulley is provided on a counterweight. The car and the counterweight are suspended from a main rope wrapped around the car suspending pulley and the weight suspending pulley. A compensating member is suspended between the beams and the counterweight. The compensating member includes a funicular body having a first end portion connected to only one of the pair of beams and a second end portion connected to the counterweight. The first end portion of the funicular body is located in a region of the one beam when viewed in a vertical direction.

Abstract: The object of the invention is an arrangement for adjusting the tautness of a traction member of an elevator, which arrangement comprises an elevator car and a compensating weight, which are for their part connected to support the elevator car by the aid of a suspension member, such as a rope or belt, and also a hoisting machine provided with a traction sheave, and one traction member, such as a belt, which is adapted to transmit the rotational movement of the traction sheave into movement of the elevator car and of the compensating weight, and also a tension control means, which is arranged to adjust the magnitude of the tension forces exerted on the suspension member and on the traction member.

Abstract: An elevator system includes a shaft extending between at least two decks of a vehicle. A base of the shaft is mounted to a deck structure of at least two decks by a coupling mechanism that accommodates flexing of the deck structure to enable the deck structure to flex independently of the base of the shaft. The elevator system further includes a cab within the shaft. The cab is movable between the at least two decks. The elevator system also includes a pneumatic system in selective communication with an interior of the shaft.

Abstract: An elevator includes a hoistway; an elevator car vertically movable in the hoistway, the passage to and/or from the elevator car being provided in depth direction of the hoistway; a counterweight vertically movable in the hoistway beside the elevator car in width direction of the hoistway; one or more ropes interconnecting the elevator car and the counterweight and hanging from these; a rope wheel arrangement in the bottom end of the hoistway for guiding the one or more ropes; and a vertically oriented guide rail for guiding the elevator car extending between the elevator car and counterweight.

Abstract: An elevator includes an elevator car and a counterweight; a first roping between the elevator car and counterweight and including at least one rope; a second roping between the elevator car and counterweight and including at least one rope; and a rope wheel arrangement, having at least one rope wheel, around which the at least one rope of the second roping passes. The longitudinal force transmission capability of the at least one rope of the second roping is based essentially on non-metallic fibers and is a belt-like rope having at least one contoured side provided with guide rib(s) and/or guide groove(s) oriented in the longitudinal direction of the rope, the side being fitted to pass against a contoured circumference of a rope wheel of the rope wheel arrangement, the circumference being provided with guide rib(s) and/or guide groove(s) so as to form a counterpart for the contoured side of the rope.

Abstract: One elevator system includes an elevator car, counterweight, traction sheave, support wrapped around the traction sheave and suspending the car and the counterweight, a compensation sheave, a compensation member wrapped around the compensation sheave and being affixed at a first end to the elevator car and at a second end to the counterweight, and a tensioner. The support is driven by rotation of the traction sheave to raise and lower the car, and the tensioner is in communication with the traction sheave for linearly displacing a rotational centerpoint of the traction sheave. Another elevator system has an elevator car, counterweight, compensation sheave, compensation rope wrapped around the compensation sheave and being affixed to the car and the counterweight, a traction sheave driving a support suspending the car and the counterweight, and a tensioner in communication with the traction sheave for inducing a variation in tension of the compensation rope.

Abstract: An elevator system includes a shaft extending between at least two decks of a vehicle. A base of the shaft is mounted to a deck structure of at least two decks by a coupling mechanism that accommodates flexing of the deck structure to enable the deck structure to flex independently of the base of the shaft. The elevator system further includes a cab within the shaft. The cab is movable between the at least two decks. The elevator system also includes a pneumatic system in selective communication with an interior of the shaft.

Abstract: The invention relates to a drive unit which comprises a motor (6)-driven spindle (5), rollers (2, 3), and cables (11), and which has a favourable transmission ratio, specifically N:1 in which N=4+n, and n is an integer between ?2 and 8 including 0. Said unit is used to move loads and people, is particularly suitable for lifts, is space-saving, environmentally friendly, low-maintenance, economical in terms of energy consumption, and call be used both in the construction of new lifts and in the renovation of older installations. It allows the installation to be operated securely, and people and loads to be transported at high speeds. It can, for example, be installed at the lower or upper end of a shaft, or also outside of the shaft. It can be used for movement in a vertical, horizontal and also inclined direction, and may be provided with a counter weight.

Abstract: An elevator arrangement includes first and second movable elevator units, the first unit being an elevator car and the second unit being a counterweight, and a roping system including a first roping portion suspending the first and second elevator units, and being locked at least to the second elevator unit, a second roping portion being suspended by the first elevator unit and the second elevator unit, and being locked at least to the second elevator unit. The first and the second roping portions are successive portions of a roping passing unbroken via a locking arrangement provided at the second elevator unit, the locking arrangement locking the roping to the second elevator unit between the first and the second portions. In a method in constructing an elevator, the locking arrangement is unlocked and thereafter the roping is repositioned with respect to the locking arrangement and thereafter the locking arrangement is relocked.

Abstract: A compensating means is guided between an elevator cage and a counterweight on the counterweight side by a guide device and monitored by a monitoring device.

Abstract: A method determines a sway of an elevator rope during an operation of an elevator system. The method includes acquiring at least one measurement of a motion of the elevator rope during the operation of the elevator system; and determining the sway of the elevator rope connecting an elevator car and a pulley based on an interpolation between boundaries of the elevator rope based on the measurement of the motion.

Abstract: An elevator has an elevator car and a counterweight suspended by hoisting ropes, which hoisting ropes are driven by a drive machine via a traction sheave, which elevator further includes a compensation rope in the lower shaft area between the car and the counterweight, which compensation rope runs around a compensation sheave arrangement in the shaft bottom, which elevator has a compensation device for the compensation of rope elongation. The compensation device includes a diverting pulley for the compensation rope connected to the counterweight, whereby the compensation rope is arranged to run over the diverting pulley, a tension weight connected with the free end of the compensation rope, a rope clamp arranged on the compensation rope and a clamp support for connecting the rope clamp to the counterweight. A compensation device is provided for the rope elongation which necessitates less vertical space in the elevator shaft.

Abstract: A counterweightless elevator includes a hoistway, a car vertically movable in the hoistway, one or more suspension ropes, a rotatable drive member engaging said suspension rope(s), each of the suspension rope(s) having a first rope section on the first side of the drive member and a second rope section on the second side of the drive member, and each rope section being connected to the car, said first rope section suspending the car, and a tightening device arranged to tighten the second rope section. Each of said rope(s) is belt-like and includes a load bearing member or a plurality of load bearing members, which load bearing member(s) is/are made of composite material including reinforcing fibers embedded in a polymer matrix, which reinforcing fibers are carbon fibers.

Abstract: The invention relates to a device and system for underground transport of ore, material and people, which includes electrical and mechanical drive systems, a plurality of hoisting devices, head ropes and balance ropes. The mass per meter of the balance ropes is significantly smaller than the mass per meter of the head ropes.

Abstract: Method for installing the hoisting roping of an elevator, wherein the first elevator unit to be moved is disposed at a suitable point in the elevator hoistway, and the second elevator unit to be moved is disposed at a suitable point in the elevator hoistway, which first elevator unit is an elevator car and which second elevator unit is a counterweight, or vice versa. The first and/or second section of the hoisting roping is connected to its elevator unit via a diverting pulley system such that when the diverting pulley system is still separate from the elevator unit, the section in question of the hoisting roping is arranged to travel under the diverting pulley system of its elevator unit, and the diverting pulley system is lowered, when reeved, downwards into the proximity of its elevator unit, after which the diverting pulley system in question is fixed to its elevator unit.

Abstract: A counterweight and an elevator car are suspended on a set of hoisting ropes. The elevator comprises one or more rope pulleys provided with rope grooves, one of said pulleys being a traction sheave driven by a drive machine and moving the set of hoisting ropes. At least one of the rope pulleys has against the hoisting rope a coating adhesively bonded to the rope pulley and containing the rope grooves, said coating having an elasticity that is greater in the edge portions of the rope groove than at the bottom of the rope groove. In a preferred solution, the traction sheave is a rope pulley like this.

Abstract: Ground-accessing elevator systems and methods are provided for transporting personnel between the ground level and one or more decks of multi-level vehicle such as a fixed-wing aircraft. The vehicle elevator systems and methods may be implemented using a multi-track guide rail system configured to guide an elevator car between the ground and two or more levels within a vehicle. The multi-track guide rail system may include an intra-vehicle track fixed to the vehicle structure and configured to guide the elevator car between decks of the vehicle, and a separate deployment track may be configured to telescope downward from the intra-vehicle guide rail track to guide the elevator car during deployment to the ground from the vehicle.

Abstract: An elevator includes at least one elevator car and a counterweight which are at least partly suspended on hoisting ropes and a drive machine driving a traction sheave engaging the hoisting ropes for moving the elevator car along guide rails in an elevator shaft, which elevator further includes a compensation rope. The compensation rope is led upwards to an upper part of the elevator shaft and from there aside to a balancing area located aside of the travel paths of the car and counterweight. This solution is particularly adapted for high travel elevators facing horizontal forces during operation as e.g. ship elevators. Collision of compensation ropes are avoided in the area below the car and counterweight paths which could affect the elevator safety when subjected to high horizontal forces, e.g. during rough sea.

Abstract: The invention relates to a method for replacing the hoisting ropes of an elevator. By the method of the invention, the hoisting ropes (4) are replaced by first joining the old and new hoisting ropes (4a, 4b) together by their one ends by splicing the ends together around a common core strand (17), whereupon the new set (4b) of hoisting ropes is pulled into place by means of the old set (4a) of hoisting ropes.

Abstract: The object of the invention is a tensioning arrangement for a traction means of an elevator, which arrangement comprises at least an elevator car configured to move up and down in an elevator hoistway and at least one or more compensating weights, which are for their part connected to support the elevator car by the aid of their own support means, such as by the aid of ropes or belts and also of diverting pulleys, and a hoisting machine provided with at least one traction sheave or corresponding, and also at least one traction means (7) such as a belt, rope or chain, which is configured to transmit the rotational movement of the traction sheave into movement of the elevator car and of the compensating weights. The traction means (7) is fixed from at least one of its ends to a fixing means (1) providing an essentially constant tensioning force.

Abstract: An elevator may include an elevator car, a set of hoisting ropes, a traction sheave, and a compensating device. The set of hoisting ropes may include first and second rope portions. The elevator car may include one or more first diverting pulleys from which the first rope portions extend upward. The elevator car may include one or more second diverting pulleys from which the second rope portions extend downward. The first rope portions may be under a first rope tension. The second rope portions may be under a second rope tension that is different from the first rope tension. The compensating device may act in substantially opposite directions on the first and second rope portions. The compensating device may produce an auxiliary force acting substantially in a same direction as the first rope tension.

Abstract: The object of the invention is an arrangement for compensating the rope forces of a traction sheave elevator, which elevator comprises at least a hoisting machine (5) and the traction sheave (6) connected to it, as well as an elevator car (1) suspended on hoisting roping (3), which is fitted to travel along guide rails (4), and in the rope suspension of which elevator is a rope force compensating element (8). The compensating element (8) comprises at least two compensation pulleys, of which the first part (3a) of the hoisting ropes (3) coming to the compensating element (8) are led over the top of the first compensation pulley (18) and the second part (3b) of the hoisting ropes (3) coming to the compensating element (8) are led to the second compensation pulley (19).

Abstract: A method and an arrangement are provided for fixing the compensating ropes of an elevator to an elevator car or to a counterweight, which elevator includes at least a hoisting machine and hoisting roping, suspended by which the elevator car as well as the counterweight are arranged to travel, and between which elevator car and counterweight compensating ropes are fixed such that the first ends of the compensating ropes are fixed to the counterweight, from where the compensating ropes are led downwards to pass below a compensating pulley, after which upwards to the elevator car, where the second ends of the compensating ropes are fixed by wedge housings in connection with the elevator car. When fixing the ends of the compensating ropes in connection with the elevator car or the counterweight, the wedge housings are turned into an inclined attitude before disposing the ends of the compensating ropes in the wedge housings.

Abstract: A lift assembly is provided for a platform such as used on a ship. The platform can have four spaced apart hitch points. In one embodiment, the lift assembly includes four trolley drive assemblies, each trolley drive assembly including a trolley guidable along a guide rail, and a drive configured to displace the trolley along the guide rails, each trolley being coupled to at least one hitch point. In a second embodiment, a tension leveling assembly is provided in a trolley drive assembly and is configured to couple each of the wire ropes to the trolley and maintain substantially the same amount of tension in each wire rope. In a third embodiment, the lift assembly can be provided on a ship that also includes a vessel for holding water.

Abstract: An elevator may include an elevator car, a set of hoisting ropes, a traction sheave, and a compensating device. The set of hoisting ropes may include first and second rope portions. The elevator car may include one or more first diverting pulleys from which the first rope portions extend upward. The elevator car may include one or more second diverting pulleys from which the second rope portions extend downward. The first rope portions may be under a first rope tension. The second rope portions may be under a second rope tension that is different from the first rope tension. The compensating device may act in substantially opposite directions on the first and second rope portions. The compensating device may produce an auxiliary force acting substantially in a same direction as the first rope tension.

Abstract: An elevator includes hoisting ropes and a compensating device. The hoisting ropes include first rope portions under a first rope tension that go upward from an elevator car and second rope portions under a different, second rope tension that go downward from the elevator car. The compensating device acts in substantially opposite directions on the first and second rope portions in order to do one or more of the following: equalize the first, second, or first and second rope tensions; compensate the rope tensions between the first and second rope tensions; equalize rope elongation in the first, second, or first and second rope portions; compensate the rope elongations between the first and second rope portions; and render a ratio of the first rope tension to the second rope tension substantially constant. The compensating device produces an auxiliary force acting substantially in a same direction as the first rope tension.

Abstract: An elevator may include an elevator car, a set of hoisting ropes, a traction sheave, and a compensating device. The set of hoisting ropes may include first and second rope portions. The elevator car may include one or more first diverting pulleys from which the first rope portions extend upward. The elevator car may include one or more second diverting pulleys from which the second rope portions extend downward. The first rope portions may be under a first rope tension. The second rope portions may be under a second rope tension that is different from the first rope tension. The compensating device may act in substantially opposite directions on the first and second rope portions. The compensating device may produce an auxiliary force acting substantially in a same direction as the first rope tension.

Abstract: A life saving implement includes a prime motor assembly, a winding drum installing in the prime motor assembly to wind a wire rope, a braking drum installed on a side of the winding drum to control an RPM of the winding drum, a braking unit installed on a lower portion of the braking drum to control an RPM of the braking drum, a speed reduction unit installed on an upper portion of the braking drum to gradually reduce the RPM of the winding drum until the winding drum stops, and a passenger vehicle moving by the rotations of the winding drum and the braking drum.

Abstract: An elevator, preferably an elevator without counterweight, comprising a number of diverting pulleys in the upper part of an elevator shaft or equivalent, a number of diverting pulleys in the lower part of the elevator shaft and a number of diverting pulleys on an elevator car, is installed in such manner that at least some of the diverting pulleys for the upper part are rigged in the lower part of the elevator shaft and at least some of the diverting pulleys from which the passage of the ropes is directed upwards are rigged at the same time. The diverting pulleys for the upper part thus rigged are raised in the rigged state to the upper part of the elevator shaft or equivalent and mounted in place.

Abstract: A method for installing an elevator may include stopping an elevator car or partially completed elevator car in the upper part of an elevator shaft; rigging first portions of hoisting ropes between the car and diverting pulleys in the upper part of the shaft so that the first portions pass via the diverting pulleys in the upper part of the shaft and first diverting pulleys on the car; moving the car to the lower part of the shaft, while supplying ropes from rope reels to the first portions between the car and the diverting pulleys in the upper part of the shaft; and rigging second portions of the hoisting ropes between the car and diverting pulleys in the lower part of the shaft so that the second portions pass via the diverting pulleys in the lower part of the shaft and second diverting pulleys on the car.

Abstract: An elevator may include an elevator car, one or more hoisting ropes, a traction sheave, an overspeed governor, at least one safety gear, a locking mechanism, and guide rails. The car may be suspended by the one or more hoisting ropes. The traction sheave may move the car using the one or more hoisting ropes. The at least one safety gear and locking mechanism may be fitted in conjunction with the car. The overspeed governor may be configured to activate and release, via a linkage, the at least one safety gear during operation of the elevator. The locking mechanism may be configured to activate and release, by operatively acting on the linkage, the at least one safety gear during installation, maintenance, or installation and maintenance of the elevator. When activated, the at least one safety gear may engage one of the guide rails to lock the car in place.

Abstract: An arrangement for equalizing rope force of an elevator may include: a hoisting machine, set of hoisting ropes, traction sheave, elevator car, guide rails, and compensating device. The hoisting machine may engage the hoisting ropes via the traction sheave. The elevator car may be at least partially supported by the hoisting ropes to move the elevator car. The elevator car may move along the guide rails. The compensating device may include first and second tensioning devices. The first tensioning device may be spaced apart from the second tensioning device. The first and second tensioning devices may be interconnected via a transmission device that transmits rotary motion. A first end of the set of hoisting ropes may be secured to a point in conjunction with the first tensioning device. A second end of the set of hoisting ropes may be secured to a point in conjunction with the second tensioning device.

Abstract: An elevator system (20) includes a tie-down compensation arrangement (40). A tension member (42) extends between a cab (22) and counterweight (26) to provide a desired amount of tension on a load bearing rope or belt (30) that supports the cab and the counterweight. The tension member (42) in one example comprises a coated steel belt. At least one sheave (46) is supported on a base module (48) and remains stationary relative to a floor of a pit (52). A damper (50) is supported for movement with the counterweight (26) or the cab (22) to absorb energy that would otherwise tend to cause counterweight jump following a rapid descent and stop of the cab (22).

Abstract: The invention relates to a device for stretching compensation in lift cables, arranged within a lift unit, with a lift shaft, a cabin (1) (FIGS. 1 and 2), a counter-weight (7) (FIGS. 1 and 2), at least one lift cable (3) (image 1), said cabin and said counter-weight on the pulley (4) (image 1 and 2) and a cable (9) (FIGS. 1 and 2) connected to the underside of the cabin and the counter-weight (FIG. 2) running around the freely-rotating pulley (10) (FIGS. 1 and 2) in the lift shaft. According to the invention, the device comprises a drive, mechanically connected to the end of at least one cable rod (27) (FIG. 4) on the underside of the cabin (11) (FIG. 2) and passing through pressure springs applied to the cabin cable section and a sensor (34) on the spring (12) (FIGS. 1 and 2), which serves to trigger the drive (16) (FIGS. 1, 2, 3 and 4). Two solutions to achieve automatic load compensation on a lift into which a load is charged are given.

Abstract: An elevator system comprises an elevator car and a counterweight fixed to a traction means. A drive pulley moves the traction means. A bottom tensioning means is fixed to the counterweight and to the elevator car. A tensioning means weight tensions the bottom tensioning means. In an end position of the counterweight, the elevator car can continue to move when the traction means is moved further by the drive pulley. This moves the tensioning means weight at half the speed of the elevator car, for example. A measuring device is provided for the tensioning means weight for detecting such a motion of the tensioning means weight. This allows a triggering of an emergency stop of the elevator car.

Abstract: An elevator system includes a cab supported for movement within a hoistway. A tension device, which remains close to one end of the hoistway, maintains a desired tension on a load bearing member that supports the cab and moves to achieve a desired placement of the cab. The load bearing member extends from a first end of the hoistway toward the cab, wraps around a first sheave supported on the cab, extends toward the first end of the hoistway, wraps around a second sheave supported near the first end of the hoistway, extends toward a second end of the hoistway, wraps about a third sheave supported near the second end of the hoistway, extends toward the cab, wraps around a fourth sheave supported on the cab, and extends toward the second end of the hoistway where it is secured to the tension device.

Abstract: An elevator may include an elevator car, a set of hoisting ropes, a traction sheave, and a compensating device. The set of hoisting ropes may include first and second rope portions. The elevator car may include one or more first diverting pulleys from which the first rope portions extend upward. The elevator car may include one or more second diverting pulleys from which the second rope portions extend downward. The first rope portions may be under a first rope tension. The second rope portions may be under a second rope tension that is different from the first rope tension. The compensating device may act in substantially opposite directions on the first and second rope portions. The compensating device may produce an auxiliary force acting substantially in a same direction as the first rope tension.

Abstract: A lift comprises a first lift cage, a second lift cage and a counterweight, wherein the counterweight, the first lift cage and the second lift cage are coupled together by way of a support means for lifting and holding, wherein the counterweight, the first lift cage and the second lift cage are additionally coupled together by way of a compensation means and wherein the compensation means runs over at least one deflecting roller. The lift further comprises a brake device for application to the deflecting roller of dissipative braking torque which counteracts the rotation thereof.

Abstract: A safety device applied to appliances for lifting boards onto ceilings and walls comprises a telescopic mast, an upper part of which accommodates the board holder and traction and safety ropes operated by a manually controlled winch, a component for attaching and fastening the traction rope and safety rope so that they are at the same fastening level, and a mechanism for tensioning the safety rope. The attachment component is fixed in the lower receiving part of the terminal inner section of the telescopic assembly. The tensioning mechanism is external relative to the telescopic mast and situated facing the winch for winding the traction and safety ropes.

Abstract: An elevator may include an elevator car, a plurality of diverting pulleys on the elevator car, one or more hoisting ropes, a traction sheave, and a compensating system. The elevator car may be suspended by the plurality of diverting pulleys on the one or more hoisting ropes. The one or more hoisting ropes may have rope portions going upwards from a first set of the diverting pulleys and downwards from a second set. The rope portions going upwards may be under a first rope tension. The rope portions going downwards may be under a second rope tension. The compensating system may act on the one or more hoisting ropes to perform one or more of equalizing tension, compensating tension, equalizing elongation, and compensating elongation in the one or more hoisting ropes, and keeping a ratio of the first rope tension to the second rope tension substantially constant.

Abstract: The present invention relates to an arrangement in an elevator without counterweight, which comprises at least a control unit (5), a hoisting machine (3) and a traction sheave (4) connected to it, and an elevator car (1) suspended on hoisting ropes (2) fixed to an essentially immovable place at their first ends and adjustably at their second ends, which elevator car (1) is fitted to travel backwards and forwards in an essentially vertical direction, and which elevator also comprises a tightening element (15) acting on the second end of the hoisting ropes (2). An actively operating actuator (17, 21, 24, 29) is in connection with the tightening element (15), which is fitted by means of feedback to keep the rope tension essentially at a predetermined level either by lightening or tightening the rope tension according to changes in the loading.

Abstract: A lift assembly is provided for a platform such as used on a ship. The platform can have four spaced apart hitch points. In one embodiment, the lift assembly includes four trolley drive assemblies, each trolley drive assembly including a trolley guidable along a guide rail, and a drive configured to displace the trolley along the guide rails, each trolley being coupled to at least one hitch point. In a second embodiment, a tension leveling assembly is provided in a trolley drive assembly and is configured to couple each of the wire ropes to the trolley and maintain substantially the same amount of tension in each wire rope. In a third embodiment, the lift assembly can be provided on a ship that also includes a vessel for holding water.

Abstract: A passenger or cargo elevator is disclosed that relies on pull chains in a closed system in which the chains are used both to pull the elevator car and also to pull the counterweights. In this way, it is possible not only to use counterweights that exceed the actual weight of the elevator car, but also additional counterweights of up to 50% of the load to be lifted may be employed without incurring the problem of the chains being jerked suddenly owing to inertia during braking. The pulling motor devices, such as planetary-type speed reducers, are coupled to servomotors which can be used to program the characteristics of the movements required by the elevator. The control system includes a programmable logic controller (PLC) and a servomotor controller which, together with the coders of the servomotors, provide position, speed, and torque characteristics for operation of the system.

Abstract: The object of the invention is an arrangement for compensating the rope forces of a traction sheave elevator, which elevator comprises at least a hoisting machine (5) and the traction sheave (6) connected to it, as well as an elevator car (1) suspended on hoisting roping (3), which is fitted to travel along guide rails (4), and in the rope suspension of which elevator is a rope force compensating element (8). The compensating element (8) comprises at least two compensation pulleys, of which the first part (3a) of the hoisting ropes (3) coming to the compensating element (8) are led over the top of the first compensation pulley (18) and the second part (3b) of the hoisting ropes (3) coming to the compensating element (8) are led to the second compensation pulley (19).

Abstract: A system and method for minimizing compensation rope sway by altering the natural frequency of compensation ropes using servo actuators. The rope sway may be minimized by moving the compensation sheave to adjust the tension of the compensation rope or adjusting the position of the termination of a compensation rope to account for changes in the position of a structure. Servo actuators may also be used to re-level the elevator car to account for rope stretch.