Abstract: An ornamental steel plate and a manufacturing method therefor wherein the ornamental steel plate includes a steel plate, a pattern forming groove being formed on the surface of which according to a pattern to be expressed, a pattern forming material having different texture and color from the steel plate and filled in the pattern forming groove, and a decal unit decalled on the surface of the pattern forming material; and the method for manufacturing the ornamental steel plate includes coating an etching resist ink on the surface of the steel plate except for a pattern to be expressed, drying and heating the etching resist ink, forming the pattern forming groove by etching the pattern by spraying an etching solution on the surface of the steel plate, removing the etching resist ink by spraying an etching resist ink remover on the surface of the steel plate, filling the pattern forming material having different texture and color from the steel plate in the pattern forming groove, removing a protruding portion

Abstract: A gas insulating switchgear comprising: a first switching unit for connecting or breaking an electric circuit between a power source and a load; a second switching unit being mechanically and electrically connected with the first switching unit and being selectively movable to an electrically conducting position, an electrically breaking position or an electrically grounding position; and an actuator being connected to supply a driving force to the second switching unit so that the second switching unit can be moved. In case that the gas insulating switch gear is applied to a switchgear having a rated insulating breakage voltage level of 125 KV, the switch gear can have a rated breakage insulating voltage of more than 125 KV (150 KV) by using the vacuum interrupter and the second switching unit each having the rated insulating voltage level of about 75 KV.

Abstract: An ornamental steel plate and a manufacturing method therefor wherein the ornamental steel plate includes a steel plate, a pattern forming groove being formed on the surface of which according to a pattern to be expressed, a pattern forming material having different texture and color from the steel plate and filled in the pattern forming groove, and a decal unit decalled on the surface of the pattern forming material; and the method for manufacturing the ornamental steel plate includes coating an etching resist ink on the surface of the steel plate except for a pattern to be expressed, drying and heating the etching resist ink, forming the pattern forming groove by etching the pattern by spraying an etching solution on the surface of the steel plate, removing the etching resist ink by spraying an etching resist ink remover on the surface of the steel plate, filling the pattern forming material having different texture and color from the steel plate in the pattern forming groove, removing a protruding portion

Abstract: An improved elevator door system for reducing vibration and noise in opening/closing a car door and a hatch door and allowing fast operation by releasing a landing door lock device before the car door moves. The elevator door system includes a hatch door; a car door; a motor for providing rotating force to open and close the hatch door and the car door; power transmitting means; a rack for possibly moving horizontally by the power transmitting means; a pinion engaged with the rack for rotating by horizontal movement of the rack; clutch connected to the pinion for transmitting or cutting off power toward the hatch door; and door lock engaged with the clutch, the door lock positioned in a lock release state in which the hatch door is movable when the clutch transmits power, while positioned in a lock state for fixing position of the hatch door when the clutch cuts off power.

Abstract: An elevator type parking system is disclosed. The system includes a main frame having a plurality of vertical columns and horizontal columns for forming a hoist way in a center portion thereof a plurality of parking rooms at both sides of the hoist way, a lift movable along the hoist way formed in the main frame, a lift lifting and lowering drive unit for lifting and lowering the lift, a parking unit installed in each floor of the parking room and being horizontally movable, a parking unit actuating unit installed on the lift for horizontally pulling the parking unit from the parking room to the hoist way and pushing the same from the hoist way to the parking room, a driven unit fixed to the parking unit and driven by the parking means actuating unit for thereby horizontally moving the parking unit.

Abstract: An emergency stop apparatus for an elevator having a simple structure as well as effectiveness, which may facilitate to reduce manufacturing and maintaining cost.

Abstract: An apparatus for controlling an operation of an elevator includes a power supply unit for detecting whether the main power supply was supplied including a charger and for outputting a predetermined control signal, an operation control unit for receiving the control signal from the direct current power supply unit and a demand control signal inputted by a user and for outputting a speed control signal and a load compensation signal so as to control the elevator system, a power consumption detector for computing a power consumption of the alternating current motor, a speed limiter for limiting a speed of the motor upon receipt of the alternating current motor speed signal from the speed detector and the power consumption of the motor computed by the power consumption detector, and a speed control unit for controlling a rotational speed of the alternating current motor upon receipt of the load compensation signal and the control signal from the speed limiter.

Abstract: The present invention relates to a leveling control device for an elevator system which estimates a load torque applied to an axis of an alternating current motor on the basis of a torque current component and a rotation angle of the alternating current motor, while carrying out a level compensation operation, and which compensates the torque current component for the difference between the estimated load torque and the load compensation torque by an output signal from a load detector, which results in an improved speed control property in the level compensation operation of the elevator system.

Abstract: In accordance with an elevator system for controlling a response to a call of the present invention, each of sub-controllers includes a unit of storing the information regarding service ability to a hall call, and a unit of determining service ability based on the information stored in the unit when the call is generated from the hall, regardless of a call response signal from a main controller. As a result, the determination and display of service ability to the hall call can be rapidly exactly performed. In addition, the main controller includes a unit of checking and determining abnormality of the sub-controllers, and a unit of storing an identifier of the abnormal sub-controller. Since the data is not transmitted to the abnormal sub-controller, a data transmission amount may be decreased. Also, during the repair or replacement work of the abnormal sub-controller, an identifier thereof can be rapidly confirmed.

Abstract: The present invention relates to a technique for an elevator car to perform an emergency operation during a power failure, and in particular to a method for controlling a rescue operation of an elevator car which can rescue passengers by performing an emergency operation with an electromotive force of a permanent magnet-type synchronous motor during the power failure, in an elevator system employing the synchronous motor as a lifting motor. The method for controlling the rescue operation of the elevator car includes: a step for obtaining the electromotive force by rotating the synchronous motor due to the weight difference between the balance weight and the car during the power failure; a step for charging the electromotive force in the condenser; and a step for gradually increasing a rotation speed of the synchronous motor from a starting time thereof to a predetermined time for speed controlling matched with a charging voltage of the condenser at an initial stage of the power failure.

Abstract: The present invention relates to a control of an AC motor, and in particular to a control device for an AC motor which can prevent an overvoltage from being applied to the motor, and minimize voltage consumption of a reactor itself during the starting and accelerating operation of the motor, by restricting a sharp increase of a motor line voltage resulting from a high-speed switching of an inverter during a high-speed operation of the motor, and a voltage reflection phenomenon of input terminals of the motor generated due to non-matching of a characteristic impedance between a power line and the motor, by inserting the reactor having a bar shaped core between the inverter and the motor.

Abstract: A water treatment apparatus using a plasma reactor and a method of water treatment are disclosed. The apparatus includes a housing having a polluted water inlet and a polluted water outlet; a plurality of beads filled into the interior of the housing; a pair of electrodes, one of the electrodes contacting with the bottom of the housing, another of the electrodes contacting an upper portion of the uppermost beads; and a pulse generator connected with the electrodes by a power cable for generating pulses.

Abstract: In a position controlling apparatus and method for an elevator which controls a position of an elevator in accordance with a velocity command profile consisting of an acceleration region, a uniform velocity region and a deceleration region, a position controlling apparatus and method according to the present invention controls generation of a synchronization position error in the deceleration region.

Abstract: The present invention comprises a hand rail driving apparatus which can easily compensate loss of driving force and tension of a hand rail, which is essential to safety of an escalator without damaging a flat belt or a roller thereof. The hand rail driving apparatus includes an escalator in which a hand rail is contacted with pressure on a hand rail driving pulley, connected through a driving chain to a driving wheel, and in which the hand rail driving apparatus drives the hand rail while exerting pressure on the hand rail by using the driving pulley. A tube, in which air pressure therein is variable, is mounted on a circumferential surface of the hand rail driving pulley to which the hand rail is contacted with pressure.

Abstract: A coin discharged apparatus includes a pipe assembly for holding a plurality of coins, a base plate having a discharging chute for discharging the coins from the pipe assembly, a coin counter for counting coins being discharged through the discharging chute, a motor having an output shaft for providing rotating torque, a rotatable arm engaged with the output shaft for transferring the rotating torque, a first rod engaged with the rotatable arm for actuating the coin counter, a second rod engaged with the first rod for pushing the coins from the pipe assembly into the discharging chute, an engaging coupling for engaging the first rod with the second rod, the base plate having an elongate hole for converting a rotating motion of the engaging coupling into a reciprocating motion to cause the first rod and the second rod to reciprocate, a guide plate having an opening corresponding with the discharging chute for discharging coins and having a slit communicating with the opening for providing a guiding passage for

Abstract: The present invention is directed to a floor for a passenger conveyor which includes floor rollers mounted below the floor, floor roller guide rails mounted upon a machine room for guiding the rollers, and a lift mounted in the machine room to be in contact with a bottom of the floor, wherein the floor can be easily opened and closed by one person without any other instrument in repair or maintenance, and wherein it is not needed to move the floor to another place after opening because the floor can stand upright in its place after opening the floor, so improving efficiency of working.

Abstract: A multi-position automatic switching actuator for a load switch includes an oil pressure cylinder member operated by power, a latch releasing member rotating in accordance with the operation of the oil pressure cylinder member, a latch member fixedly engaged to the latch releasing member and rotating in accordance with the rotation of the latch releasing member, a latch stopping member connected to the latch member and limiting the rotation of the latch member by a predetermined angle, an elastic member disposed between the latch releasing member and the latch member for instantly rotating the latch member, and a central shaft inserted through the latch member. The actuator appropriately switches a contact position to another and carries out a multi-position switching control by employing a single actuator, thereby simplifying production, decreasing production cost, and securing safety in work operations.