Abstract: In an elevator apparatus, a car ascends and descends based on a running speed pattern generated by a control panel. Destination floor buttons and landing buttons are connected to an over speed monitoring portion without the intervention of the control panel. The over speed monitoring portion has an over speed setting portion for setting first and second over speeds based on car position information obtained from a car position detector and call registration information obtained from the destination floor buttons and the landing buttons. In the over speed setting portion, a running speed pattern different from the running speed pattern generated by the control panel is independently generated without depending on information from the control panel. The first and second over speeds are set based on the running speed pattern generated by the over speed setting portion.

Abstract: Safety gear of an elevator tripped at a speed lower than the gripping speed of the elevator. Tripping of the safety gear in an overspeed situation is arranged to occur by means of the rope driving the overspeed governor via a rope sheave (3). Connection of the brake (5) or other device that slows the rope sheave to the rope sheave (3) is controlled using an actuator, which disconnects from the movement of the rope sheave when the brake or other device that slows the rope sheave connects to brake the movement of the rope sheave.

Abstract: An elevator apparatus has a criterion (overspeed levels) that changes in accordance with an operational condition of a car. The elevator apparatus also has a position information correcting means that corrects an error in value that determines the criterion. In the elevator apparatus, the overspeed levels are determined using continuous information corresponding to car position, while the continuous information is corrected using intermittent information corresponding to actual car position. According to the elevator apparatus, on-the-spot adjustment or long-time maintenance becomes unnecessary, and overspeed detection levels can easily be changed in accordance with the operation conditions of the car.

Abstract: The invention relates to a method for preventing an inadmissibly high speed of the load receiving means of an elevator by continuously monitoring the actual speed of the load receiving means (elevator car) by means of a speed monitoring device (24). If an excess speed is detected, the speed monitoring device (24), depending on the excess speed situation, is adapted to activate at least three different breaking measures successively.

Abstract: A fork-lift truck having a mast, a load-carrying means having a load-carrying fork which is supported by the mast and is adjustable in height by means of a lifting and lowering drive wherein the load-carrying fork is adjustable with respect to the horizontal line by means of an inclination drive, and an electric control and regulation device for the respective drives which is connected to operating members for the lifting and lowering drive and inclination drive, wherein an analog sensor detecting the inclined position of the load-carrying fork is provided the inclination signal of which is sent to the control and regulation device and that the control and regulation device is connected to a separate operating member for the inclination drive or the operating member for the inclination drive is configured in such a way that actuating it causes the load-carrying fork to be automatically moved to a predetermined position, preferably a horizontal position.

Abstract: A method for operating a fork-lift truck the lift mast of which that guides a load-carrying means is provided for regulating the lateral position, the inclination and/or the angular position of the load-carrying means relative to the lift mast, wherein the driving speeds of the drives have a maximum upper limit when the load-carrying means is in its highest position, wherein the height of the load-carrying means is measured by steps or continuously and the maximum acceleration/deceleration and/or the maximum speed of at least one drive increases with a decreasing height of the load-carrying means.

Abstract: In a speed governor linkage mechanism that is displaced by centrifugal force acting on rotary weights, a balancing weight is provided in addition to speed adjustment spring for generating balancing force in opposition to the centrifugal force. When the speed of the cage is less than a prescribed speed, restraint of movement of the speed governor linkage mechanism is performed solely by the balancing force produced by balancing weight but when the speed of the cage exceeds said prescribed speed, restraint of movement of the speed governor linkage mechanism is performed by both the balancing force produced by the balancing weight and the balancing force produced by the speed adjustment spring.

Abstract: Safety device for monitoring safety distances in relation to destinations and in relation to movable objects as well as different maximum traveling speeds, in particular, for elevators and, preferably, for arrangement on an elevator car, comprising a distance and speed determination unit, a comparator device for comparing the predetermined distance dependent on the destination and having an associated nominal speed with the actual values and a triggering unit for triggering a braking device when the nominal values are exceeded. The aim of the invention defined in the patent claims is to adapt the present-day mechanical speed limiter to the requirements of modern elevator systems as well as to add new functions.

Abstract: A method and apparatus for braking a tractor sheave elevator. In an emergency situation, the elevator braking is complimented by using a second braking device not connected to the traction sheave. A secondary braking can be accomplished by applying a braking force to the elevator ropes or guide rail. If the secondary brake is applied first, the ropes will not slip on the traction sheave when the primary brake is applied. Alternatively, slippage may be allowed to occur in order to distribute the heat produced by braking.

Abstract: An elevator including a movable unit, such as a passenger cage or a counterweight balancing the passenger cage, configured to ascend and descend in an elevator shaft by operation of a drive unit, and a governor configured to detect the speed of the movable unit to effect an emergency stop of the movable unit, the governor being fixed by means of a support member to a guide rail extending along the elevator shaft.

Abstract: An elevator including a cage configured to ascend and descend along a guide rail in an elevator shaft, a drive unit configured to move the cage up and down, and an emergency stop device configured to urgently stop the cage when the cage descends at an extraordinary speed. The emergency stop device including an emergency stop mechanism provided at a lower end portion of the cage and configured to engage the guide rail, thereby urgently stopping the cage, a link mechanism provided at the lower end portion of the cage so as to be located close to the emergency stop mechanism and configured to actuate the emergency stop mechanism on receiving an external input, and a speed detector configured to detect the descent of the cage at the extraordinary speed and correspondingly to apply the external input to the link mechanism.

Abstract: A machineroomless elevator system (10) has a controller (32)and a governor (38) positioned in the hoistway (12) at the top floor level (28), such that the controller (32) and the governor (38) are both positioned between the front wall (14) of the hoistway (12) and an elevator car guide rail (34) positioned on a sidewall (18) of the hoistway (12).

Abstract: An elevator including a movable unit, such as a passenger cage or a counterweight balancing the passenger cage, configured to ascend and descend in an elevator shaft by operation of a drive unit, and a governor configured to detect the speed of the movable unit to effect an emergency stop of the movable unit, the governor being fixed by means of a support member to a guide rail extending along the elevator shaft.

Abstract: An elevator speed governor includes a motion converter for converting a traveling speed of a traveling section of an elevator into a rotational speed; an overspeed sensor for sensing a rotational speed not less than a predetermined speed; and an overspeed detector for detecting an overspeed of the traveling section to stop the traveling section, wherein the motion converter includes permanent magnets supported by a rotating shaft of the motion converter so that the magnets rotate with the rotating shaft. An eddy current is generated according to the traveling speed in an electric induction conductor arranged in a traveling direction of the traveling section of the elevator. A rotational torque is generated in the rotating shaft by interaction between the eddy current and the magnetic flux produced by the permanent magnets.

Abstract: An elevator rescue system includes a power source of back-up electrical power. A manually-operated, rescue enable switch switchably permits the transmission of electrical power from the power source to a motor brake coil of an elevator car during a rescue operation such that the energized coil releases the motor brake to move the car to a desired landing. A speed detector measures the speed of the elevator car and thereupon generates a speed control signal corresponding to the speed of the car. An overspeed detection circuit has a first input for being actuated when receiving electrical power from the power source, a second input for receiving the speed control signal, and an output for transmitting electrical power to the motor brake coil when the speed control signal is below a predetermined value and for automatically stopping the transmission of electrical power when the speed control signal becomes higher than a predetermined value. A manually-operated brake release switch has an input and an output.

Abstract: An apparatus and method for determining the speed of an elevator car. A radar speed sensor (30) is provided determining the velocity of an elevator car (2). The speed sensor produces a signal which is processed by a processor (52) and compared to a threshold speed value by speed detection module (70). The speed detection module produces an overspeed signal (72) triggering the operation of actuator (34) and safety brake (26).

Abstract: An automatic Braking system for an elevator car (10) is designed to stop it when it reaches or exceeds a speed limit of movement within an elevator shaft. A stop mechanism (40) is mounted on car (10), or a part thereof, so as to lock a stop pulley (41) which then moves relative to the car in a direction substantially parallel to the direction of the car (10) movement. A control mechanism (11) reacts to responsive to the stop pulley (41) movement to apply the brakes (12, 13).

Abstract: An elevator rescue system includes a power source of back-up electrical power. A manually-operated, rescue enable switch switchably permits the transmission of electrical power from the power source to a motor brake coil of an elevator car during a rescue operation such that the energized coil releases the motor brake to move the car to a desired landing. A speed detector measures the speed of the elevator car and thereupon generates a speed control signal corresponding to the speed of the car. An overspeed detection circuit has a first input for being actuated when receiving electrical power from the power source, a second input for receiving the speed control signal, and an output for transmitting electrical power to the motor brake coil when the speed control signal is below a predetermined value and for automatically stopping the transmission of electrical power when the speed control signal becomes higher than a predetermined value. A manually-operated brake release switch has an input and an output.

Abstract: An elevator overspeed system designed to work as a governor includes a first switch responsive to an overspeed condition and a second, remotely located switch responsive to said first switch. An overspeed elevator control procedure is initiated when one of the first or second switches are tripped. The first switch is automatically re-set after the second switch is tripped. The second switch is manually re-set to re-start the elevator system in normal operation mode.

Abstract: An exemplary embodiment of the invention is directed to an elevator braking system including an accelerometer for detecting acceleration of an elevator car and generating an acceleration signal. An over-acceleration detection module compares the acceleration signal to an acceleration threshold. If over-acceleration detection module detects an over-acceleration condition, a first switching device disrupts power to a solenoid in order to activate a braking assembly.

Abstract: An electronic overspeed governor for preventing elevator overspeed by enabling safety devices. The electronic overspeed governor includes a microprocessor assembly designed to interface with existing sensors, detectors, components, and safety equipment of current operational and production elevator systems. The microprocessor assembly receives very accurate position measurements from a position measurement system. The microprocessor receives configuration information from a rom which contains data specific to the particular model of elevator and other installation specific parameters. The software calculates elevator speed based on successive position data. If an overspeed or near overspeed condition occurs, the microprocessor generates the appropriate outputs to be conveyed to the elevator safety system. The safety system activates devices to arrest the overspeed condition.

Abstract: The invention relates to a method and an apparatus for controlling a hydraulic elevator, in which a car (2) is movable up and down in an elevator shaft (1). The car (2) is connected to a reciprocating piston. The car (2) is driven by an oil pump (40), with which pressurized oil is pumped between a tank (41) and a reciprocating cylinder (3). The oil pump (40) is driven by a motor (39), which is supplied by a controllable power supply part (28). The speed of the car (2) is detected by a sensor (13). A control and governing unit (10) controls and regulates the devices that affect the motion of the car (2), namely the motor (39) and a valve unit (43). In upward motion, the speed of the car (2) is controlled by regulation the motor (39). According to the invention, in downward motion, closed- or open-loop control is exerted on the valve unit (43).

Abstract: When a control unit receives a second ID code within a specified time after receiving a first ID code in the ID code registration mode, and decides that the first ID code is coincident with the second ID code, the control unit stores the ID code as a newly registered ID code in a storage unit.

Abstract: Method and device for stopping of an elevator cage due to a deviation of the elevator position, acceleration, or speed from a travel curve in excess of a certain predetermined safety margin. Travel parameters, computed by the elevator control, may be passed on to a drive control of a cage drive for moving and positioning of the elevator cage, and may also be passed on to a drive control of a reference drive for moving and positioning a trigger part. Accordingly, each of the elevator cage and the trigger part may be driven by individual discrete drivers, but, due to each driver receiving the same travel parameters, the elevator cage and the trigger part move in synchronization. The trigger part may be coupled to the elevator cage to be movable when the elevator cage deviates from the computed travel curve. When the deviation from the travel curve exceeds a predetermined safety margin, the trigger part may actuate a safety switch to stop the cage or reference drivers or to arrest movement of the elevator cage.

Abstract: An apparatus for testing a speed limiter in an elevator installation includes a drive wheel engaging a cable groove of a cable guide roller in the speed limiter. The drive wheel is rotated by rotational device having a speed control for linearly increasing the speed of rotation of the cable guide roller until the speed limiter is triggered. The rotation of the drive wheel is detected by an evaluating device attached to the rotational device and having an opti-electronic system for generating a light beam toward reflectors on the drive wheel and detecting reflected light beams. The triggering instant of the speed limiter is detected by an acceleration sensor connected to the evaluating device which then calculates the triggering speed from the speed of the drive wheel at the triggering instant.

Abstract: An elevator includes an evaluation unit. A pair of position pick-ups are connected to the cable assembly and/or driving pulley of the elevator and coupled to the input of the evaluation unit. The elevator is accelerated or decelerated for checking adhesion of the cable onto the driving pulley (traction sheave). The motion parameters of the cable assembly and the driving pulley are sensed separately, and the drive capability can be determined therefrom.

Abstract: The overspeed governor is provided with a switch to disable the operation of the elevator motor. The apparatus includes a controllable actuator which resets the switch into a state enabling the operation of the elevator motor. The actuator is preferably a geared d.c. motor.

Abstract: The main disconnects for energizing a drive motor for an elevator may be controlled by a circuit having a safety chain, an inspection device, a circuit board and a coil for the main disconnect wherein the safety chain provides a safe condition signal to the inspection device which in turn provides a plurality of mode signals to the circuit board which evaluates the mode signals in order to provide a circuit breaker control signal to the circuit breaker coil. In turn, the circuit breaker coil either opens or closes the main disconnect.

Abstract: An elevator car door is moved by a variable voltage, variable frequency linear induction motor which is driven open current loop to achieve a desired velocity profile indicated by an incremental linear encoder, with washed out proportional and integral gain. A magnetizing current insufficient to overcome the weight of the door is added in quadrature with the linear force current, and frequency is determined open loop in a predetermined fashion. Pulse width modulation voltage control signals are utilized to apply fixed voltages of correct polarity through a low pass three phase filter to the windings of the motor for correct intervals of time so as to synthesize desired sinusoidal winding currents. A boost of current is provided following each zero crossing of the sinusoidal winding currents to overcome lags therein. A ramp down of voltage avoids dropping the door at the end of door opening and door closing.

Abstract: An elevator car door is moved by a variable voltage, variable frequency linear induction motor which is driven open current loop to achieve a desired velocity profile indicated by an incremental linear encoder, with washed out proportional and integral gain. A magnetizing current insufficient to overcome the weight of the door is added in quadrature with the linear force current, and frequency is determined open loop in a predetermined fashion. Pulse width modulation voltage control signals are utilized to apply fixed voltages of correct polarity through a low pass three phase filter to the windings of the motor for correct intervals of time so as to synthesize desired sinusoidal winding currents. A boost of current is provided following each zero crossing of the sinusoidal winding currents to overcome lags therein. A ramp down of voltage avoids dropping the door at the end of door opening and door closing.

Abstract: The main relay that controls power to an elevator motor and brake lift coil is dropped by an electronic emergency stop relay contact placed in series with the elevator safety chain in the event that the speed and position indications in the elevator controller do not agree with the indications of the emergency terminal stopping speed and zone relays, or if the elevator controller indicates the elevator is going too fast when within the emergency terminal stopping zone. Various parts of the safety chain are cycled off when the elevator is at a landing in order to check the safety circuits and main power relays.

Abstract: An elevator includes a cab supported and guided by guide rails for travel along the guide rails. Emergency stop devices for stopping the travel of the cab are fixed to the cab. Mounted on the cab is a governor for actuating the stop devices when the traveling speed of the cab exceeds a predetermined speed. The governor includes a roller mounted on the cab and in rolling contact with one of the guide rails so that the roller rolls on the guide rail in interlocking engagement upon travel of the cab. A governor pulley is rotatably mounted on the cab and connected to the roller through a belt so as to rotate in interlocking cooperation with the roller. A safety Link mechanism is mounted on the cab and actuates the stop devices when the rotating speed of the governor pulley exceeds a predetermined speed.