Abstract: Elevator, which includes an elevator hoistway, an elevator car configured to move with a certain range of movement in the elevator hoistway, a brake on the elevator car, which brake can be displaced between a braking state and a non-braking state, in which braking state the brake is configured to grip a structure in the elevator hoistway for braking the elevator car, and a rope loop, which rope loop hangs in its position supported by the diverting pulley of the top end, said diverting pulley being supported in a manner allowing rotation in the proximity of the top end of the range of movement of the elevator car, and the rope loop is connected to the aforementioned brake, which brake is configured to be such that it can displace into a braking state as a consequence of a pull exerted on the brake by the rope loop. The rope loop comprises consecutive to each other a first section and second section, which have average masses per meter of different magnitudes.

Abstract: A lift system is coupled between a work platform and a mast on a mast lift. The lift system includes at least one lifting rope connected between the work platform and the mast via an idler roller and a hoist drum connected to the work platform. The idler roller is displaceable between an engaged position and a disengaged position based on an amount of tension on the lifting rope. A spring is connected to the idler roller and urges the idler roller toward the engaged position. A carriage latch assembly includes a carriage latch hook coupled with the idler roller and a pin secured to the mast. When the idler roller is disposed in the engaged position, the carriage latch hook is engageable with the pin.

Abstract: An elevator installation comprises an elevator cage movable along guide rails and a counterweight movable along guide rails, wherein provided for braking the elevator cage and the counterweight is at least one brake device in which at least one gearwheel is disposed in mechanically positive connection with the guide rail and the gearwheel can be braked by a brake, wherein a first gearwheel is provided, which when the brake is triggered is disposed in mechanically positive connection with the guide rail, and wherein a second gearwheel is provided, which when the brake is activated is disposed in mechanically positive connection with the guide rail.

Abstract: In an elevator door apparatus, an elevator door is capable of reciprocating between a door closure position for closing an elevator entrance and a door open position for opening the elevator entrance. The elevator door is driven by a door drive device. The door drive device is controlled by a door control device. The door control device adjusts the door open position based on control information for controlling an operation of an elevator, obtains a door opening/closing pattern for the elevator door to be opened and closed between the adjusted door open position and the door closure position, and controls the door drive device so that the elevator door is reciprocated in accordance with the obtained door opening/closing pattern.

Abstract: Method and system for detecting and stopping uncontrolled movement of the car (1) in an elevator. In the method movement of the car is detected with the first movement detection means (2, 3, 4, 5, 6) when the brake (8) of the drive machinery (7) is in the braking status with the purpose of holding the car in its position without moving. A first control signal is formed if the car moves in the aforementioned situation. Movement of the car is stopped on the basis of the first control signal with a separate stopping appliance (9) with respect to the brake of the drive machinery. The operating condition of the first movement detection means are tested with the second movement detection means (10, 11, 12) during driving of the car in order to detect a fault situation. A second control signal is formed for the elevator control when a fault situation is detected, in which case the elevator control drives the car to the next stopping floor and prevents the subsequent run of the car.

Abstract: In the invention a method is presented for ensuring operating safety in an elevator system, an elevator system, and a safety device of an elevator system. The elevator system includes at least an elevator car, elevator ropes, an elevator motor, a traction sheave and at least two holding brakes, which holding brakes are arranged to prevent movement of the elevator car when the elevator is stopped. According to the invention the first holding brake is engaged at the end of an elevator run, and the other holding brakes are engaged with a delay. When one holding brake is engaged, the state of motion of the elevator and any slipping of the brake is monitored. If the brake is detected as slipping, a procedure for preventing a hazardous situation is performed.

Abstract: In relation with this mechanism for stopping an elevator car is, for the monitoring of the speed of the elevator car, an overspeed governor provided which works based on the swing lever principle, whereby the movement of the elevator car will be transferred by means of a governor rope to the overspeed governor. The governor rope extends itself over the entire shaft height and will be returned at the lower shaft end by means of a deflection sheave and stretched by means of counterweight as well as guided at the upper shaft end over a pulley of the overspeed governor. The ends of the governor rope are fastened on a release mechanics arranged on the elevator car and such release mechanics operates in an emergency a safety gear arranged on the elevator car. With the overspeed of the elevator car a rope brake is released upwards.

Abstract: A device and procedure for creating and securing a temporary safety space within an elevator hoistway such that a service or maintenance technician can work with impunity from a car entering the safety space. In particular, the device includes a stop bar for installation between and in engagement with opposing guide rails of the hoistway to prevent upward or downward movement of the car or a counterweight.

Abstract: A vertically sliding freight elevator landing door with a safety brake that deploys when a chain suspending the door breaks. The safety brake is adapted for use on both panels that slide up to open or that slide down to open. The brake, which is simple in construction and installation, comprises, principally, a caliber block fixed to the door and a roller cam assembled in the block. A spring biases the roller cam towards a wedge lock position while a cable normally holds the roller cam in an inactive position. The cable and, therefore, the roller cam are released when the associated door suspension chain breaks. The roller cam, operating between a tilted internal surface in the caliper block and a door guide rail quickly frictionally brakes the door on the guard rail.

Abstract: In an elevating mechanism 14 where an elevating mechanism 17 carried so as to rise and fall along a fixed surface 16 is moved up and down through a suspension member 18, a braking mechanism 18 is born by the elevating mechanism 17 so as to pivot vertically. A tensile spring 32 is provided on the braking mechanism 31, for pivotally urging it to the direction close to the fixed surface 16, while the suspension member 18 is connected to the braking mechanism 31, for pulling the braking mechanism 31 in the direction apart from the fixed surface 16 due to the weight of the elevating mechanism 17, in opposition to the tensile spring 32. When the suspension member 18 is cut off, then the braking mechanism 31 comes into contact with and digs into the fixed surface 16 by action of the tensile spring 32, so that the elevating mechanism 17 can be stopped from falling.

Abstract: A safety brake assembly is disclosed comprising a housing movable on a vertical support, the housing attached to a carpet support arm, a pulley rotatably mounted on a shaft of the housing, a link having an inner end pivotally connected to the shaft and an outer end connected to a first end of a pivot bracket on the housing, a second end of the pivot bracket connected to a wedge-shaped member adjacent the pulley, and tensioning means connected intermediate the ends of the pivot bracket. In the event of cable failure, the upward pressure previously exerted on the pulley is released, causing a downward movement of the pulley and link, the movement transferred by means of the pivot bracket to cause upward movement of the wedge-shaped member which is forced up between the pulley and the vertical support, the resultant friction arresting further downward movement of the housing and carpet support arm.

Abstract: A cable lift includes a platform supported on posts and raised and lowered by cables. Yoke ends support the platform on the posts by means of dogs which project into openings in latch plates on said posts. The dogs are retracted in order to lower the platform. In the event of a slack cable condition, a slack cable actuator moves the dogs back into contact with the latch plates.

Abstract: In a safety arrangement of a cable-supported component of a medical device that can be adjusted via a cart at a column, a force acts on the cable via at least one clamping lever that is adjustably supported at the cart, and the cart is free for purposes of adjustment along the column given action of the force, and the clamping lever is moved such that it blocks displacement of the cart relative to the column when the force is reduced.

Abstract: Eddy current braking apparatus includes a linear array of spaced apart permanent magnets arranged for defining a slot therebetween. A diamagnetic or non-magnetic fin is disposed and sized for movement through the slot. A pivotal linkage enables the magnets to move with respect to the fin from a spaced apart first position to a second position in which the fin passes through the slot. A control mechanism selectively moves the magnets between the first and second positions.

Abstract: An apparatus for stacking sheets has a frame defining a stacking station, a conveyor for delivering the sheets continuously one after the other at a predetermined upper level in a transport direction to the station, and a platform vertically displaceable in the stacking station between the upper level and the lower level. The antidrop protector includes a vertically extending rack fixed on the frame, a lever pivoted on the platform adjacent the rack and having a pair of arms one of which is connected to a lift cable, a stop on the other of the lever arms engageable in the rack, and a spring braced between the platform and the lever. The cable is connected to a drive that tensions the cable, displaces the platform vertically, and rotates the lever in one rotational sense. The spring urges the lever in the opposite sense so that when the cable is detensioned the spring urges the stop into the rack and vertically arrests the platform.

Abstract: An elevating work platform structure for use in constructing an elevator channel before and after the elevator car has been placed into the elevator channel includes a horizontal beam, two side posts connected to two ends of the horizontal beam, two upper platforms integrally connected to two upper side ends of the two side posts respectively, two lower platforms integrally connected to two lower side ends of the two side posts respectively, and two safety brake arrangements provided at a lower front portion of each of the side posts for providing an instant emergency brake if the suspension cable holding up said elevating work platform structure breaks.

Abstract: A safety device for a platform cable hoist within a latticework tower including a plurality of skid members which are flexed inwardly when there is tension from a lift cable. Brake members are secured to the skid members and, in the event the cable fails, the skid members deflect outwardly so that the brake members, which have hook portions at their upper ends, engage transverse braces of the tower. Between the hook portions and the skid members, the brake members are formed with an energy absorbing portion which absorbs kinetic energy from the falling platform to slow and stop its descent.

Abstract: A handicapped duck blind elevator system for elevating/lowering handicapped individuals to and from a conventional duck blind structure. The inventive device includes a support frame that is mounted adjacent a conventional duck blind, a lift cage frame slidably retained within the support frame, a winch attached to the support frame for elevating/lowering the lift cage frame, and a boat ramp positioned within a conventional duck boat. A first ramp is provided within the lift cage frame for loading/unloading an individual within a wheelchair from the boat ramp into the floor of the lift cage frame. A second ramp is provided within the lift cage frame for unloading/loading an individual within a wheelchair from the conventional duck blind.

Abstract: An apparatus and method for braking a carriage which travels on rails of an inclined or vertical elevator. The elevator includes a cable driving device having cables connected to the carriage for moving the carriage along the rails. The carriage has a main frame assembly and a movable frame assembly, mounted to slide along the main frame assembly. The braking device comprises a cam disk assembly having eccentric disks rotatably mounted to the movable frame assembly and held in a first position at a predetermined distance away from a surface of each of the rails for frictionally engaging the rails when released from the first position. The cam disk assembly then causes a plurality of brake blocks of the brake device to engage frictionally the rails when the eccentric disks frictionally engage the rails. A first releasing device causes the eccentric disks to release from the first position and engage frictionally the rails when at least one of the cables breaks.