Patents Examined by W. E. Duncanson, Jr.
  • Patent number: 4984659
    Abstract: An elevator control apparatus includes a brake having a brake coil which is energized in response to a start signal to release the braking force exerted by the brake. A current sensor detects the current flowing through the brake coil and generates an actuating signal when the brake coil current changes due to the brake being released. The actuating signal causes a drive circuit to supply current to a motor for driving an elevator cage. As a result, the elevator cage can be smoothly started.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: January 15, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Masami Nomura
  • Patent number: 4984660
    Abstract: An apparatus for controlling an elevator adds cage moving distances per unit time by advance position calculating means at predetermined time to a reference value in parallel with the running operation of the elevator, corrects the moving distance by advance position correcting means in accordance with plate position information at the time of detecting the plate disposed in an elevator shaft in a position corresponding to a floor, and then compares the actually moved distance with the plate position information stored in a memory to obtain a cage advance floor.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: January 15, 1991
    Assignee: Mitsubishi Kenki Kabushiki Kaisha
    Inventors: Satomi Ikejima, Shigemi Iwata
  • Patent number: 4982817
    Abstract: A group supervision apparatus for an elevator system having hall call registration devices for registering each hall when a hall button is depressed, assignment apparatus for selecting a cage to-serve from among a plurality of cages and assigning the selected cage to the hall call, cage control apparatus for performing operation controls such as determining travelling directions of the cages, starting and stopping the cages, and opening and closing doors of the cages, and for causing the cages to respond to cage calls and the hall calls allotted to the assigned cages, and standby devices for causing, when the cages have responded to all the calls, the cages to stand by at floors where they have responded, or to run to predetermined floors and stand by; the apparatus being so constructed that cage positions and cage directions of the respective cages to arise after the cage calls and the allotted hall calls have been successively responded to since the present point of time, during a predetermined time, are pr
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: January 8, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Shintaro Tsuji
  • Patent number: 4982816
    Abstract: In an elevator provided with an inverter driven induction motor, output torque is determined by direct current of an inverter, slip frequency is determined from the thusly determined torque, the gap between an open-loop dictated speed pattern and the actual speed is compensated by the slip calculated during acceleration and constant speed movement, so that the open-loop control may be improved in terms of stop position precision.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: January 8, 1991
    Assignee: Otis Elevator Company
    Inventors: Kazuhiko Doi, Yasutami Kito
  • Patent number: 4982815
    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.
    Type: Grant
    Filed: November 7, 1989
    Date of Patent: January 8, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Noboru Arabori, Hideaki Takahashi, Yoshio Sakai, Tsutomu Sano, Masao Nakazato, Masakatsu Tanaka, Katutaro Masuda, Mitsuo Saito, Yuji Toda
  • Patent number: 4979594
    Abstract: In this wireless remote control system, control signals and reporting-back signals are bidirectionally transmited between at least one portable transmitter-receiver unit, a stationary transmitter-receiver unit and a control. The portable transmitter-receiver unit contains a microprocessor and is carried, for example, by hand or in a clothing pocket. Control commands are input, depending upon their frequency of occurrence, by way of a ten-key keyboard, fixed keys or stored in a storage and transmitted as control signals via an operating mode selector switch selectively in either one of the operating modes "manually by push-button" or "automatically, permanently". The signalling is non-public and on an indicator. The stationary transmitter-receiver unit with microprocessor is mounted stationarily in the transmission range of the associated portable transmitter-receiver unit and communicates the received control commands to the control.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: December 25, 1990
    Assignee: Inventio AG
    Inventors: Guntram Begle, Thomas Hinderling
  • Patent number: 4980572
    Abstract: This invention relates to a scheme for generating electricity using gravitational energy. The scheme uses a set of massive underground spinning wheels, each wheel being fitted with a mechanism to receive and transmit gravitational torque pulses from a passing vehicle to keep the wheels in motion. The mechanism used to apply the torque pulses to the spinning wheels consists of a stepping board, a hollow cylindrical rod disposed vertically and a shoe attached to the lower end of the vertical rod by a hinge with the upper end of the rod protruding above the ground surface. A steel linkage connecting the stepping board and the lower part of the shoe is used for initial positioning of the shoe. Both the stepping board and the protruding end of the vertical rod are kept in their initial upward positions by means of two springs. The electricity is generated by using each spinning wheel in combination with an appropriate gear system to act as the prime mover of an alternator.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: December 25, 1990
    Assignee: Synchrosat Limited
    Inventor: Asim K. Sen
  • Patent number: 4976338
    Abstract: A hydraulic elevator includes level sensors for establishing dead zones of different sizes and for changing the dead zone while the car is stopped at a floor. A controller selects the size of the dead zone, for purposes of relevel operations, based upon elevator operating state (e.g. doors open or closed, time of day, time since last run) or other parameters (excess oil temperature, motor temperature, or excess motor starts). The controller also selects an effective hysteresis value either to return the car to floor level or to move the car to a position above floor level. In this manner, the controller maintains a small dead zone, and returns the car to level, when the doors are open. When the doors are closed, a larger dead zone is selected to reduce the frequency of relevel operations. Moreover, under certain conditions, the car is moved, during releveling, to a position above the landing, to further reduce the number of required relevel operations over time.
    Type: Grant
    Filed: April 27, 1989
    Date of Patent: December 11, 1990
    Assignee: Delaware Capital Formation, Inc.
    Inventor: Gordon A. Holland
  • Patent number: 4974703
    Abstract: An elevator cage control apparatus includes a brake coil energized and deenergized by start and stop command signals to move and restrain the cage, respectively. A current detector detects current flowing through the brake coil. A counter counts a time interval beginning at generation of the stop command signal and ending when current in the brake control gradually decreasing increases instantaneously and a time interval beginning at generation of the start command signal and ending when current in the brake coil gradually increasing decreases instantaneously. A memory stores the counted time intervals. A drive command issuer commands a motor driving circuit to stop and start the cage, after the counted time intervals stored in the memory have lapsed, respectively.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: December 4, 1990
    Assignee: Mitsubishi Denki Kabushikia Kaisha
    Inventor: Masami Nomura
  • Patent number: 4973856
    Abstract: The water inflow structure for a hydroelectric generator system has a step which cooperates with two adjacent blades of a runner to retain a quantity of water, the weight of which rotates the runner. Each blade of the runner has a forward surface which is inclined when the blade is at its highest position, to prevent water from overlying the runner shaft to produce reverse rotation. An inflow opening is formed in the step to admit water past a blade which is at the step.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: November 27, 1990
    Inventor: Pellegrini Loreto
  • Patent number: 4971178
    Abstract: A feedback controlled elevator system driven by a traction drive motor in response to a speed pattern provided by a car controller. The speed pattern is limited when the car approaches a terminal floor within a predetermined terminal slowdown zone adjacent to the terminal floor. A pattern limiting signal is provided in response to digital integration of shaft encoder signals which provides a digital position "x" of the car within a terminal zone. The position "x" of the car is then used to access a read-only-memory which contains the maximum car speed for the specific location of the elevator car. The value from the read-only memory is used to limit the speed pattern.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: November 20, 1990
    Assignee: Inventio AG
    Inventors: Colin D. Schauder, Tac H. Nguyen
  • Patent number: 4970404
    Abstract: A method of generating electricity by a wind blown turbine comprising mounting a generator aramture rigidly on a shaft; rotatably mounting a housing, a field coil and a wind turbine with respect to the shaft; electrically connecting the field coil through brushes and a brush plate; and mounting the shaft against rotation so that when air currents rotate the wind turbine, the housing, the field coil, and the brush plate will rotate whereby electrical current generated in the field coil will be transmitted to output lines. An apparatus for generating electricity comprising an armature rigidly mounted on a shaft and a wind turbine rotatably mounted on the shaft. A housing with a field coil is mounted within the wind turbine and surrounds the armature. A brush plate with brushes electrically connects the field coil. Air currents rotate the wind turbine to cause the field coil to rotate about the armature. Electrical current generated in the field coil is transmitted through the brushes to output leads.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: November 13, 1990
    Inventor: Lloyd D. Barger
  • Patent number: 4963760
    Abstract: A starter comprises an electric motor which produces torque for starting an engine; a speed reduction planet gear unit in which a carrier by which a plurality of planet gears are rotatably supported is integrally formed with a rotary shaft disposed coaxially with the armature shaft of the electric motor, so that the rotary shaft is rotated at a lower speed than the armature shaft as the torque of the armature shaft is transmitted to the rotary shaft; an output rotary shaft provided with a speed reduction gear engaged with the gear formed on the rotary shaft; and a pinion supported on the output rotary shaft so that the pinion can be engaged with and disengaged from the ring gear of the engine and can be rotated by the torque of the inner member of the clutch.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: October 16, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takeshi Sugiyama
  • Patent number: 4963761
    Abstract: A wind-driven power generator comprises a substantially horizontal roof including upper and lower roof members each having a peripheral edge and a contoured pressure reducing surface. The roof members are disposed in a spaced-apart relationship with the pressure reducing surfaces facing each other and defining an air space therebetween. The distance between the pressure reducing surfaces varies from a maximum spacing at the peripheral edges of the roof members to a minimum spacing at an intermediate location of the roof members. The power generator further includes a vertical suction pipe having an upper end connected to the lower roof member in flow communication with the air space at the intermediate location of the lower roof member. The lower end of the suction pipe extends downwardly from the lower roof member. An impeller is disposed in the suction pipe at the lower end thereof and rotates when air flows horizontally through the air space.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: October 16, 1990
    Inventor: C. Calvin Wight
  • Patent number: 4962340
    Abstract: An engine starter has a cup-shaped front bracket 24 for containing an output rotary shaft 23 having a pinion 28 on its front end and axially slidable, a driving force transmitting unit 22, an electric motor 21 having a hollow cylindrical yoke fitted in rear a opening of the front bracket, and a solenoid switch 30 mounted to the rear portion of the electric motor and having an operating rod 35, 38 which extends through the interior of the electric motor to abut against the output rotary shaft for pushing out the output rotary shaft. The front bracket has on its outer periphery a mounting flange 42 of a mounting spigot joint diameter larger than the outer diameter of an inner gear 25b of a planetary speed reduction gear of the driving force transmitting unit or the outer diameter of the yoke of the electric motor.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: October 9, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Shuzoo Isozumi
  • Patent number: 4959896
    Abstract: Apparatus and method are provided to protect a gas engine or turbine used to generate electric power against damage that would otherwise result from changes in the operating characteristics of the engine, for example, changes caused by fluctuation in the heat content of the gaseous fuel. To effect such protection, the engine or turbine is controlled by adjusting the supply of fuel gas to the engine or turbine in response to changes in the output of the electric power generated.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: October 2, 1990
    Assignee: Oryx Energy Company
    Inventors: William D. Bolin, Robert L. Roper
  • Patent number: 4958707
    Abstract: An elevator control system comprises an elevator controller for controlling the running of a cage and a plurality of input/output terminal equipments for controlling devices provided at a landing place on each floor and/or in the cage, each of the elevator controller and the plurality of input/output terminal equipments including a transmission controller provided with a transmission circuit and a reception circuit so that the elevator controller and the plurality of input/output terminal equipments are connected to each other through transmission lines, wherein each of the elevator controller and the plurality of input/output terminal equipments is provided with an abnormality detector for detecting an abnormality and a transmission stopping device for inhibiting transmission through the transmission circuit of its own transmission controller upon detection of occurrence of an abnormality by the abnormality detector.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: September 25, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Kenzi Yoneda, Toshiki Kajiyama, Kazuhiro Sakata, Mitsuo Munakata, Masato Suzuki
  • Patent number: 4951787
    Abstract: An elevator control and indicator device comprises an assembly incorporating a circuit for mounting on a panel. The control circuit is connected to a piezoelectric element for generating an elevator control pulse in response to an output signal from the element. The circuit further comprises transient voltage suppression diodes shunted across the piezoelectric element and the transistor output. The device also can be configured to provide an indication of the position of an elevator car.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: August 28, 1990
    Assignee: U.S. Elevator, Corporation
    Inventors: Larry W. Lind, Richard E. Watt
  • Patent number: 4947965
    Abstract: In a group-control for an elevator system with plural elevator cages, when a hall call is generated, evaluation values of all of group-controlled cages with respect to the generated hall call are calculated by a predetermined evaluation function, as expressed by the following formula:.phi..sub.n =(WT-k.sub.p Z.sub.p +k.sub.c T.sub.c +k.sub.L L.sub.L -K.sub.z Z.sub.Z -k.sub.s Z.sub.s).sub.nn=1, 2, . . ., Nwherein N denotes the total number of group-controlled elevator cages, WT, Z.sub.p, T.sub.c, L.sub.L, and Z.sub.s represent evaluation indexes of a waiting time, an equal time-interval operation preferential zone, a riding time, a cage-load factor, a first-arriving cage preferential zone and a stop call, and k.sub.p, k.sub.c, k.sub.L, k.sub.z and k.sub.s represent control parameters for the last five of the evaluation indexes above, respectively. The generated hall call is allotted to a cage having a minimal evaluation value calculated by the aforesaid evaluation function.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: August 14, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Soshiro Kuzunuki, Yuzo Morita, Kenzi Yoneda, Takaaki Ueshima, Toshimitsu Tobita, Atsuya Fujino
  • Patent number: 4948985
    Abstract: This external penstock is designed to direct a portion of water from a waterfall to a water wheel coupled to a generator that produces electrical power for inductrial and other use. Primarily, it consist of a telescoping sleeve assembly securable to a cliff face behind a water fall, and a nozzle on the bottom of the assembly directs the downward flow of water against blades of a water wheel mounted to a platform also secured to the cliff face behind the waterfall.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: August 14, 1990
    Inventor: Nelson P. Adams