Abstract: A control apparatus for an A.C. elevator having a variable voltage and variable frequency inverter for driving an induction motor coupled to a cage of the elevator, a control device for controlling the inverter in accordance with a deviation between a speed signal detected from the induction motor and a speed command signal having a preset value, and an abnormality detection device for interrupting feed of the A.C. power to the induction motor upon detecting that a slip frequency command corresponding to the deviation is greater than a predetermined set value and continues exceeding the predetermined set value in excess of a predetermined period of time.

Abstract: An electronically commutated coaxial starter motor for use with internal combustion engines of the type including those utilized with lawn mowers, pumps, generators, automobiles and the like.

Abstract: In a case where peculiar control information which differs depending upon buildings is revised, a first memory for storing the revised information and a second memory for storing the original information before the revision are disposed, and addresses and contents are correspondingly stored in both the memories, whereupon the stored contents of both the memories are displayed on a display unit at the respectively corresponding addresses. Thus, the presence or absence of an alteration error in the case of the revision of the control information can be reliably checked.

Abstract: A group control assigns elevator cars to floor calls optimized in such a manner, that minimal waiting times result and the elevating capacity is increased. A computing device provided for each elevator calculates at every floor a sum proportional to the time losses of the waiting passengers from the distance between the floor and the car position as indicated by a selector, the intermediate stops to be expected within the distance and the instantaneous car load. By means of call registering devices in the form of ten key keyboards at the floors, it is possible to enter calls for destination floors, so that at the time of calculation, the floor calls and the car calls are available simultaneously. The calculated lost time sum, also called servicing costs, is stored in a cost memory provided for each elevator.

Abstract: An off-road, heavy duty, haulage vehicle includes a diesel engine driving an alternator (generator) for producing electrical power for motorized rear wheels. An alternator field converter is electrically connected to the alternator and an armature converter and a motor field converter are electrically connected to the two motors of the motorized rear wheels. A computerized control center includes control systems including an alternator field converter control system, a motor field control system, and a vehicle operation and maintenance control system. Tertiary windings are used as a source of excitation and the phase angle controlled armature converter is used in conjunction with alternator voltage control system for holding the alternator at an increment of voltage higher than the motors but not at a constant maximum voltage level.

Abstract: An improved operating panel device for an elevator system is disclosed which can be constructed with a limited depth, and which involves no mechanically operating parts at those portions which are to be manipulated by passengers, providing a substantially extended service life, and which is also durable and relatively immune to vandalism or rough operation by passengers.

Abstract: The velocity of a cage during a time interval from the start of deceleration to the stoppage of the cage is controlled by utilizing a velocity characteristic which changes depending upon the load condition or oil temperature of a hydraulic elevator, that is, a magnitude by which the velocity characteristic during the acceleration of the cage differs from a reference running characteristic. Thus, even when the load state or the oil temperature has changed, the operating period of time of the hydraulic elevator is shortened, so that a comfortable ride, energy saving, cost reduction etc. are attained.

Abstract: An indicating device for which the passengers waiting at a floor can recognize immediately whether the calls entered by them at the floor for desired destination floors have been assigned to an arriving car so that rapid entry decisions can be taken. To this purpose, the indicating device includes a first and a second indicator element in the form of an upward and a downward arrow, and a third indicator element signaling an entry prohibition. A floor circuit connected with the indicator by way of three inputs activates through the first and second inputs, the first and the second indicator elements respectively, if the entered calls are assigned to the arriving car, and by way of the third input activates the third indicator element, if the entered calls have not been assigned to a car arriving at a floor.

Abstract: A group control apparatus for elevators includes a main station for performing a hall call registration of an elevator cage, floor remote stations, arranged in elevator halls for the respective floors of a building in which elevators are installed, for generating a hall call signal and performing a call display of the elevator cage, and a single data transmission line for coupling each of the floor remote stations to the main station and for performing serial data transmission.

Abstract: An elevator control system includes a car load measuring device for generating a car load signal representing the number of passengers in an elevator car and a floor load sensor for generating a signal representing the number of passengers waiting for an elevator at each floor. As the elevator car approaches the next floor at which it could stop, the floor load sensor generates its signal for that floor which is combined with the car load signal in an adder to generate a signal representing the total car load if the elevator car were to stop. The signal representing the total load is compared with a signal representing a maximum permissible car load and, if the maximum has not been exceeded, an enable signal is generated to one input of each of a plurality of logic circuits. The second input of each logic circuit is connected to a memory cell for a corresponding floor in a floor call memory and the third input of each logic circuit is connected to the corresponding floor in the floor selector device.

Abstract: An electric starter for cranking an internal combustion engine. The starter has a solenoid which has a motor terminal. The motor terminal is connected to the electric cranking motor of the starter by conductor means which are located entirely internally of the starter. The solenoid has a battery terminal that is provided with a threaded bore that is adapted to receive a connector bolt.

Abstract: A power source for a starter motor comprising a frame, a hand crank rotatably connected to the frame, a flywheel generator connected to the hand crank, and power transmission electrically connected to the flywheel generator so as to transmit energy to a starter motor. The flywheel generator comprises a flywheel connected to the hand crank, a permanent magnet fixedly attached to the flywheel, and a stator winding mounted to the frame. The stator winding is electrically connected to the power transmitter. The power transmitter includes a rectifier bridge electrically connected to the flywheel generator and connector leads for connecting the rectifier bridge to terminals associated with a starter motor. A gear train is arranged within the frame so as to transmit a greater rate of rotation to the flywheel.

Abstract: A procedure for entering into an elevator control computer information specific to a particular installation of an elevator provided with operating devices capable of data transfer includes employing a computer test programme to map elevators used in the particular installation and their positions by sending out a query round to addresses which are tabulated in the computer and which represent all possible operating devices, and by inferring the kind and number of the action means present in the installation on the basis of the answers received in the query round. During a test travel of the elevator, by activating and reading the devices the location of the devices, the geometry of the building and the distances between floors are sensed. All the information thus received and which is necessary for controlling the elevator is stored permanently in the memory of the control computer, to enable normal operation of the elevator in the installation.

Abstract: The invention provides a method for the regulated control of a moving body carrying a variable load driven along a predetermined path for slowing it down gradually and stopping it accurately at a given point, more particularly the car of an elevator installation.It is characterized in that:the possible slowing down references are all of different slopes and are defined as a function of the load carried by the moving body to be slowed down,the magnitude (G.sub.e) representative of the energy consumed is measured before entering the slowing down phase,it is from the estimated load (C.sub.e) that, for the slowing down phase of the moving body, the reference chosen from the set of references (20 to 23) is imposed as being the one having a slope suitable for the estimated load.

Abstract: Prior generating systems utilizing electrically-compensated constant speed drives (ECCSD) have typically required a separate starter motor for starting a prime mover which supplies motive power to the ECCSD, thereby increasing the size and weight of the system. In order to overcome this problem, a generating system is provided with circuitry coupled to the electrical power windings of a permanent magnet machine (PMM) forming a part of the ECCSD for causing the PMM to develop motive power which causes an output shaft of a differential of the ECCSD to rotate at increasing speeds. When the output shaft of the differential reaches a predetermined speed, a generator coupled to the output shaft of the differential is supplied external or ground power which in turn causes the generator to operate as a motor and return motive power through the differential to the prime mover to start same and bring it up to operating speed.

Abstract: The invention discloses an automated hydraulic valve, for use in an elevator propulsion system. The elevator includes a car which is powered by a piston which moves within a cylinder. The automated valve controls the flow of hydraulic fluid into and out of the cylinder. The valve insures that the acceleration and deceleration of the elevator car will be uniform, and that the acceleration or deceleration will occur over a constant, predetermined interval, regardless of the load in the car. The control valve allows fluid to flow from a reservoir, and into the cylinder or back to the reservoir, with varying rates of flow. When fluid is directed into the cylinder, the elevator ascends. When fluid is allowed out of the cylinder, the elevator descends. The operation of the control valve is governed by a bypass piston assembly which is moved in response to the sensed pressure in the cylinder and the pressure in the valve.

Abstract: The integral part of a power controller and of a PI speed controller is formed by a common integrator, both controllers always being engaged. With this linear interlinking of the two controllers, stability can be assured in the two limit cases of the network (rigid network and ohmic island) as well as practically in all cases in between.

Abstract: A control system for variable speed hydraulic turbine generator apparatus comprises an induction generator connected at its primary side to an AC power line system, a secondary excitation controller connected to the secondary side of the induction generator and being responsive to a generator output command signal supplied externally to supply to the induction generator an excitation current which causes the induction generator to generate AC power at the same frequency as that on the AC power line system, a hydraulic turbine for rotating the induction generator, a guide valve for regulating the amount of water supplied to the hydraulic turbine, a rotation speed detector for detecting a rotation speed of the induction generator, a rotation speed command calculator for receiving a hydraulic turbine running condition signal inclusive of the external generator output command signal and calculating an optimum rotation speed command, a rotation speed controller for comparing the optimum rotation speed command with

Abstract: An elevator control apparatus for controlling operation of a cage in an elevator system in which a normal speed command signal is generated having a normal pattern providing gradually decreasing terminal speed as the cage approaches a level of a terminal floor; a terminal-floor slowdown signal is generated having a normal pattern generally similar to the normal pattern of the normal speed command signal and separated therefrom by a magnitude determined by a bias value; the normal speed command signal is chosen as a final terminal slowdown command signal for controlling terminal speed of the cage when, based on comparing the command signals, the normal speed command signal is less than the terminal-floor slowdown command signal, or the terminal-floor slowdown command signal is chosen as the final terminal slowdown command signal for controlling terminal speed of the cage when, based on comparing the command signals, the normal speed command signal is not less than the terminal-floor slowdown command signal; an

Abstract: A regenerative braking system for a linear induction motor includes a control device to increase the frequency slip in a braking mode and reduce the regenerative capacity of the motor. The control device is regulated by sensing means which monitor the voltage of the external power conductor and increase the slip if the voltage exceeds a predetermined value. This reduces the power regenerated by the motor and prevents excessive voltages in the conductor. A latch prevents cycling between the full and reduced regenerative braking to prevent oscillation of the braking force and is reset upon selection of a motoring condition for the motor.