Abstract: A load detector device for an elevator which detects the load of an elevator cage having rod-shaped anchoring members connected to ropes which suspend the cage. Each anchoring member having an associated elastic support member which elastically supports the anchoring member to an anchoring plate which is axially translatable. Activator members are provided, each surrounding an anchoring member and bearing at one end thereof on an annular seat fitted on the anchoring member, to extend axially translatably through the anchoring plate. Displacement of the ends of the activator members with respect to the anchoring plate is detected by a displacement detector thus facilitating determination of the cage load.
Abstract: A self correcting infrared intrusion detection system primarily for elevator doors establishes multiple through-beams to intelligently detect passengers and adjust for environmental changes. Beam patterns are monitored by software that differentiates between intrusions and malfunctions and adjusts itself automatically when hardware partially fails in the absence of an intrusion. The system automatically chooses and executes two different door-width sensing routines. A plurality of spaced apart transmitter stations mounted vertically apart in one door faces a plurality of spaced apart, receiver stations mounted in the other door. Each transmitter station periodically radiates modulated light towards the receivers in the opposite door. A main control circuit monitors all receivers, controls all the transmitters, and executes the software.
Abstract: An engine starter system starts a motor in response to operation of a starter keyswitch. Immediately before the engine is started, a capacitor is manually connected to a power supply such as a storage battery. When the capacitor is charged up to a preset voltage, the electric energy stored in the capacitor is discharged to energize the motor.
Abstract: An apparatus for controlling elevator doors where door operation velocity is calculated based on the rotational velocity of the door driving motor. An abnormality detection circuit is provided to alert an elevator supervisor when the calculated door operation velocity exceeds a predetermined value. A velocity limiting circuit is provided to decelerate the doors when the door operation velocity exceeds the predetermined value.
Abstract: An apparatus for controlling group supervisory operation of elevators comprises a first computer for performing hall call control and car assignment control at usual times, a second computer for performing learning control at usual times, a system bus which connects the first computer to the second computer, and an abnormality detection device for disconnecting a computer which has developed a fault from the system bus if an abnormality of either the first computer or the second computer is detected and for making the computer which is operating normally perform the functions of the two computers.
Abstract: A linear motor elevation system comprising an elongated magnetic induction member (21) mounted along the hoistway. The induction member (21) has a plurality of magnetic poles (21a) disposed at equal intervals along the hoistway so that they face toward the armature (27). An elevator car (4) or a counter weight has attached thereto a field magnet (26) disposed in a facing relationship with respect to the magnetic induction member (21) for generating magnetic poles in the induction member (21). The field magnet (26) comprises an iron core (23) having a U-shaped cross section including a central web portion on which a field winding 24 is wound and parallel flange portions extending from the web portion toward the magnetic induction member (21).
Abstract: An elevator control apparatus comprises a drive for driving the car door of an elevator, an operation management control device which is installed in a machine room of the elevator and which generates not only a command signal for controlling the operation management of the car, but also a door open ready signal, a door control device which is installed in the car and which controls the drive device based upon the command signal generated by the operation management control device. The door control device also generates status signal indicating the status of the door.
Abstract: A position sensing system includes a coded tape vertically mounted in an elevator shaft and a sensor unit mounted on an elevator car to detect code indicia on the tape. The sensor unit is connected to output circuitry for converting the sensor outputs to elevator position data for transmission to an elevator controller. The tape has two parallel tracks of indicia extending along its length. The first track comprises a pseudo-random code sequence which is non-repeating along any N successive bits for the length of the tape, and the sensor unit includes a first set of sensors for detecting the indicia in the first track and producing an N-bit output representative of a coarse elevator position. The second track has spaced indicia forming a fine scale between successive coarse code positions on the first track, and a second set of sensors detects the fine code indicia and produces fine code position information at successive points between each pair of coarse code positions as the sensors traverse the tape.
May 1, 1991
Date of Patent:
August 4, 1992
United States Elevator Corp.
Richard E. Watt, Willilam R. Hoelscher, John H. Parker
Abstract: Apparatus for monitoring the cage of an elevator for crime prevention including a connection establishing two-way voice communication between a telephone/television within the elevator cage and a similar device at a remote monitoring point. Communication is automatically established in response to a signal, such as generated by elevator call buttons, utilized in operation of the cage.
Abstract: A hydraulic elevator control apparatus comprises an induction motor for driving a hydraulic pump which sends and receives a fluid, an inverter circuit for determining the number of rotations of the induction motor using variable-voltage variable-frequency, and a speed control apparatus which detects the voltage and current of the induction motor, calculates the number of rotations of the induction motor on the basis of the detected voltage and current, and controls the inverter circuit on the basis of the calculated number of rotations.
Abstract: A turbine generator with a rotor having magnets secured in a receptacle shaped portion and spinning about a stationary core to produce electricity. Jets of fluid impinge tangentially upon a circumferential roughened surface of the rotor and are spaced such that a fanning out of each of the impinging fluid streams is minimized by its adjacent upstream fluid stream to transfer a greater force to the rotor.
Abstract: Elevator door chain contacts are isolated from the safety chain in a separate circuit, thus enabling the use of a separate door chain coil for independently checking the status of the door chain itself and for enabling the remainder of the safety chain. The status of the door chain itself may be checked to make sure the doors are all closed when they should be. If it is determined the door are not all shut, the car door may be cycled open and shut in an attempt to correct a possible problem at the landing. The individual hoistway door contacts in the door chain may be checked, one at a time, while the car doors are fully opened at each particular floor to make sure that the door chain is not being incorrectly shorted, i.e., to make sure the hoistway door switch contact at the particular floor is opening when it should. A checking contact may be wired into the door chain and used to selectively open circuit the door chain to ensure that the door chain coil is not directly shorted to the power supply.
Abstract: A method of operating a common elevator in a composite building which contains a plurality of types of exclusively used floors provided separately from each other and corresponding to a plurality of objectives, and a plurality of lobby floors provided separately from each other and corresponding to the plurality of types of exclusively used floors comprises the steps of selecting either of a plurality of operation modes respectively corresponding to the plurality of types of exclusively used floors and offering an elevator service only to the corresponding exclusively used floors and to the corresponding lobby floor, determining the presence or absence of users of the elevator in the selected operation mode, and changing over the operation mode to the other operation mode among the plurality of operation modes when it is determined that there is no user.
Abstract: A group control selects the cars of an elevator group for boarding passengers such that the passenger arrive at the shaft door of the selected elevator earlier than the selected car whereby unnecessarily long stops are avoided. A memory for the storage of times needed by a passenger for traversing the paths between the respectively actuated call registering and indicating device and the shaft doors of the elevator is provided for each elevator. A comparator connected to the memory compares the passenger traverse time with the travelling time of the car to the call input floor. If the travelling time is less than the time needed by the passenger to move to the shaft door, a switching device connected to the output of the comparator becomes effective to exclude the elevator from the call allocation procedure.
Abstract: An elevator is driven by a linear motor having a flat secondary element comprised of a plurality of segments which extend the length of an elevator rise. The segments of the secondary element are connected by a bus bar which overlaps joints between each adjacent segment by enclosing an end portion of each segment. The bus bar, conducts current across the joints, provides a surface for guide rollers which maintain an air gap between the secondary element and a primary element, and minimizes relative motion between adjacent segments of the secondary element.
March 15, 1991
Date of Patent:
February 25, 1992
Otis Elevator Company
Timothy J. Gsrinaski, Jerome E. Jaminet, Eric G. Olsen
Abstract: A group control for double car elevators permits the upper as well as the lower cars to be used at a main stopping floor for travel to both even-numbered and odd-numbered floors. The control has a call memory for each car in which the target calls entered at the main stopping floor and identifying the target floors are stored. A switching circuit has an input connected to the call memories in such a manner that the double car is scheduled in dependence on the allocated call as stopping at floor pairs numbered even-odd or odd-even. An output of the switching circuit is connected to a switching device which excludes either the double cars stopping at floor pairs numbered even-odd or at floor pairs numbered odd-even from the allocation process in the case of a subsequent call to be allocated in order to maximize the possiblilities for coincident stops without losing flexibility.
Abstract: A method and apparatus for magnetohydrodynamic (MHD) generation of a combined-closed-cycle type using an MHD generator and a gas turbine-generator unit. A heater heats ooperative fluid to introduce the heated operative fluid into an MHD generator for power generation. The operative fluid is passed from the MHD generator to a compressor through a first portion of a heat exchanger. The compressed operative fluid is introduced from the compressor to a gas tubine-generator unit through a second portion of the heat exchanger, so that the gas turbine-generator unit generates power by the compressed operative fluid. The heat exchanger recovers heat energy of the operative fluid between the first and second portions thereof. After power generation, the operative fluid is returned to the heater form the turbine-generator unit to complete a combined-closed-cycle of the operative fluid.
Abstract: A group management method and apparatus for elevators is disclosed. The apparatus includes a car-position predicting device for predicting a car position and a car direction which will have been taken by each car when a predetermined time has elapsed, a predicted-empty-car detecting device for predicting from the predicted car position and direction an empty car which will be available when the predetermined time has elapsed, and an assignment restricting device for restricting the assignment of the predicted empty car to a floor call. In the group management method, a waiting time derived from a registered floor call which is assigned to each car is evaluated, and a car to be assigned to the floor call is selected on the basis of the result of the evaluation.
Abstract: A safety device for an elevator which detects a trouble of the control device quickly to apply an emergency brake, thereby to ensure the safety of the people in the cage. The elevator safety device is so designed that the harmonic wave component produced by an inverter is detected with the aid of a band-pass filter, and when the harmonic wave component thus detected becomes abnormal, an emergency stop instruction is produced.
Abstract: This device for controlling the operation of at least two thermal engines coupled to the same drive shaft of an alternator, comprising a regulator for regulating the rotational speed of the engines and proportional actuators for adjusting the position of a member controlling the injection of fuel into each engine, which are controlled in response to an output signal from the regulator. The device includes a closed-loop servo-control of the position of each control member as a function of the output signal from the regulator.