Abstract: In a passenger conveyor, in order to reduce installation dimensions and, more particularly, a height of the passenger conveyor, the passenger conveyor is constructed to be driven by a linear motor, with stators and moving members of the linear motor being formed such that surfaces thereof facing each other are located in horizontal planes and generated magnetic flux of the stators is perpendicular to the facing surfaces. The moving members are mounted on the respective treadboards.

Abstract: An elevator car and a counterweight is suspended on a sheave by means of a rope in a well-rope faashion. In dependence on the number of passengers on the car, the sheave is applied with an unbalance torque making appearance between the car and counterweight. Upon starting of the elevator operation by releasing a brake, upward or backward bouncing of the car takes place due to the unbalance torque. For preventing such bouncing of the car, a start compensation is performed by generating a motor torque which can cancel out the unbalance torque in precedence to the releasing of the brake. The brake is installed swingably on a winding equipment. Displacement of the brake during actuation thereof indicates the presence of the unbalance torque.

Abstract: An elevator apparatus includes an electric motor for driving the elevator apparatus, an elevator cage adapted to be lifted or lowered by the electric motor, a brake device for holding and retaining an elevator driving system, including the electric motor, and a malfunction detecting device responsive to the application of a torque to a retainer section of the brake device during the lifting or lowering of the elevator cage.

Abstract: In a current source power converting apparatus, in which an AC to DC converter is coupled to a DC to AC inverter through a DC reactor, two energy absorbing devices are coupled to DC terminals of the converter and the inverter, respectively, whereby there is formed a circulation circuit for circulating a current through the two energy absorbing devices and the DC reactor, when a voltage, which is higher than a predetermined value, is induced by an inductance of the DC reactor.

Abstract: An elevator control apparatus comprises an inverter device for supplying an induction motor for driving an elevator cage with AC electric power of variable voltage and frequencies and control equipment for controlling the output voltage and frequencies of the inverter device in response to signals produced in floors served by the elevator and in an elevator cage. The inverter device is constructed by a converter unit for converting AC electric power to DC electric power, at the input end of which a capacitor is connected in parallel with an AC electric source, an inverter unit for inverting the DC electric power converted in the converter unit into AC electric power, at the output end of which a capacitor is connected in parallel with an induction motor for driving the elevator cage and a DC reactor connected between the converter unit and the inverter unit.The thus constructed elevator control apparatus does not cause interference in electric appliances such as audio equipment, computer etc.

Abstract: In an elevator control system, in which the elevator car is controlled on the basis of elevator car positions obtained through the counting of distance pulses provided in proportion to the distance travelled by the car and floor height data indicative of the heights of individual floors, the distance pulses are counted by moving the car at a low speed from the lowest floor to the highest floor, and the count at the time of the actuation of a floor position detector, which is actuated when the car passes by each floor, is stored as the floor height value of that floor in a RAM (Random Access Memory). With this arrangement, the measurement of the floor heights is facilitated, and also the preparation of a ROM (Read-Only Memory) for storing the floor height data for each elevator car is made needless to promote the standardization.

Abstract: A control logic for an elevator servicing a plurality of floors of a building comprises two microcomputers. The two microcomputers are provided with abnormal state detectors of their own. When the abnormal state detector of one microcomputer is actuated, the elevator is operated for recovery to the nearest floor by the other microcomputer on the condition that the abnormal state detector of the other microcomputer is not actuated, and thereafter retrial for the abnormal microcomputer is effected by an instruction from the other microcomputer. When the abnormal microcomputer recovers to normal state by the retrial, the elevator keeps operating, thereby preventing such a problem that the elevator cannot continue service by erroneous operation due to noise.

Abstract: An elevator test operation apparatus for a multi-floor service elevator comprises a digital computer for processing an elevator control signal. The digital computer is provided with means for storing an elevator operation control program, and interface means for transferring a signal from an elevator control system to the digital computer or transferring a signal from the digital computer to the elevator control system, thereby to process the signal from the elevator control system in accordance with said elevator operation control program.

Abstract: An elevator system has a system control device for controlling a plurality of elevator cars and elevator car operation control devices for operatively controlling each of said elevator cars in accordance with signals issued in the system control device.At least one of the elevator car operation control devices includes an interface unit to receive hall-call signals issued in said hall-call registration device and a signal processor to supply the signals delivered from the interface unit to said system control device, to be supplied the signals treated in said system control device and to supply treated signals to an elevator car operation control section constituting a part of said elevator car operation control device.

Abstract: A plurality of floors served by elevator cars are scanned by direction to detect car positions and hall calls. For each of the cars, a predetermined number is counted up for each scan slot after detection of a car position to determine the service load of each car to be borne before arrival at each floor. When a hall call is detected by scanning, a car with minimum service load in the related slot is selected and the hall call is allotted to that car. When the failure of a car to run to an end floor is predicted in counting the service load of the car, switch is made to count down in response to directional reversal when the scanning has reached the end floor. At the time of subsequent detection of an allotted hall call by scanning, switching is again made to count up, thus determining a proper service load of the cars.

Abstract: An elevator control system for controlling a plurality of elevator cars servicing a plurality of floors of a building by allotting a hall call originated from one of the floors to a suitable one of the elevator cars so that the hall call can be serviced by the selected elevator car. In the elevator control system, a scan signal generator is provided to generate a scan signal which is used to sequentially scan the floors in successive scan slots for detecting hall calls and elevator car service positions and converting the detected information into pulse signals. The elevator control system comprises counters for counting up the service loads of the individual elevator cars in the successive scan slots after the detection of the elevator car service positions, so that, when a hall call is detected in one of the scan slots, an elevator car providing a minimum service load at the specific scan slot can be selected, and the detected hall call can be allotted to the selected elevator car.

Abstract: A control circuit for allotting hall calls to elevator cars in an elevator car system, having a generator for generating a scanning signal consisting of scanning pulses. A hall call detector receives the scanning signal and generates a signal indicating the floor at which a hall call occurs. Elevator car detectors are provided, each of which receives the scanning signal and generates a signal indicating the position of the corresponding elevator cars. A memory circuit determines the serving areas of the respective elevator cars according to the signals from the elevator car detectors. An allotting circuit allots the signals from the hall call detector to the elevator car according to the area determined by the memory circuit.