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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 5814774 | Elevator system having a force-estimation or position-scheduled current command controller The invention provides an elevator system for controlling movement of an elevator car with respect to guide rails in an elevator hoistway, having a force-estimation or position-scheduled current command controller and a magnet driver circuit without the n... | 09/29/1998 |
| 5810120 | Roller guide assembly featuring a combination of a solenoid and an electromagnet for providing counterbalanced centering control The present invention provides a roller guide assembly for controlling the position of an elevator car in relation to guide rails of an elevator hoistway in an elevator system. The roller guide assembly includes at least one electromagnet means and at lea... | 09/22/1998 |
| 5617023 | Industrial contactless position sensor A contactless position sensor uses at least a first magnetic flux source on one side of an object, wherein a sensor is responsive to the flux, for providing a sensed signal indicative of varying positions (x) of the first magnetic flux source and the obje... | 04/01/1997 |
| 5610845 | Multi-parameter air data sensing technique Static pressure sensing and free airstream temperature sensing is obviated in a method for determining aircraft velocity relative to an airmass by utilizing a static pressure and temperature component present in pressure variations sensed by a total press... | 03/11/1997 |
| 5400872 | Counteracting horizontal accelerations on an elevator car A method and apparatus for actively counteracting a disturbing force acting on a suspended elevator cab in a frame moving vertically in a hoistway is disclosed. A manifestation of the disturbing force such as acceleration is sensed and counteracted, for e... | 03/28/1995 |
| 5379864 | Magnetic system for elevator car lateral suspension An electromagnet actuator has an E-shaped core for coupling magnetic flux between the core and a blade of a hoistway rail. A pair of coils wound on the core provide the flux in such a way as to produce both side-to-side and front-to-back forces that can b... | 01/10/1995 |
| 5367132 | Centering control for elevator horizontal suspension An improved centering control for an elevator horizontal suspension having at least one actuator and includes a circuit for disabling the control or braking the actuator in response to an error signal indicative of the difference between a reference signa... | 11/22/1994 |
| 5345049 | Elevator system having improved crowd service based on empty car assignment A method for controlling the dispatching of elevator cars, and apparatus for accomplishing the method. The method includes the steps of (a) receiving a hall call from a floor landing; (b) determining a current passenger load of an elevator car; (c) determ... | 09/06/1994 |
| 5345046 | Voice communication for elevator Upon detection of a trapped passenger in an elevator car, a resident monitoring device initiates communication between the car and a telephone in the building and between the car and a remote monitoring center. Upon detection of the first responsive telep... | 09/06/1994 |
| 5329077 | Elevator ride quality Rail learning is combined with feedback in a control for improving ride quality in an elevator. For example, a pre-stored signal indicative of a horizontal deviation of the rail's surface from a vertical reference is retrieved and used along with a sensed... | 07/12/1994 |
| 5321217 | Apparatus and method for controlling an elevator horizontal suspension A method and apparatus for counteracting a disturbing force acting on an elevator platform in a hoistway comprises sensing the acceleration and position of the platform and applying a force between the platform and the hoistway in proportion to the magnit... | 06/14/1994 |
| 5317114 | Elevator system having dynamic sector assignments Method and apparatus is disclosed for operating an elevator system that includes a group of elevator cars servicing a plurality of floor landings divided into Sectors. The method includes the steps of, with a controller associated with each elevator car o... | 05/31/1994 |
| 5313026 | Electronic stepper to determine elevator car position, with automatic error correction and immunity from power failure An electronic stepper for indicating floor position has initialization switches set by a serviceman for indicating a reference floor position. Whenever the car goes by the reference position in the hoistway, the corresponding reference floor is output. Th... | 05/17/1994 |
| 5308938 | Elevator active suspension system A method and apparatus for actively counteracting a disturbing force acting on a suspended elevator cab moving vertically in a hoistway is disclosed. A manifestation of the disturbing force such as acceleration is sensed and counteracted, for example, by ... | 05/03/1994 |
| 5294757 | Active vibration control system for an elevator, which reduces horizontal and rotational forces acting on the car A method and apparatus for actively counteracting a disturbing force acting on a platform moving vertically in a hoistway is disclosed. A manifestation of the disturbing force such as rotational acceleration or translational accelerations indicative there... | 03/15/1994 |
| 5159163 | Elevator management system time based security A method of operating an elevator system includes the steps of specifying and storing at least one profile describing at least one elevator operational characteristic, including an elevator security function specifying a landing or landings for which hall... | 10/27/1992 |
| 5157228 | Adjusting technique for a digital elevator drive system Automatic and manual adjustment of a new elevator system installation is accomplished by means of a service tool for interacting with software resident in the elevator system whereby various control parameters such as the feed forward gain of the drive sy... | 10/20/1992 |
| 5155305 | Delayed start of elevator car deceleration and creep using VVVF technology The invention concerns an open-look speed control device for an induction motor to drive an elevator cabin, approaching a premarked where braking must be initiated point in advance of stopping at a marked point at a floor level to be approached at a creep... | 10/13/1992 |
| 5107964 | Separate elevator door chain 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. T... | 04/28/1992 |
| 5093910 | Serial data transmission between redundant channels Data is communicated between redundant channels formatted in blocks having an initial command word followed by a destination code, starting address and a variable number of data words including a word count. The blocks are transmitted between each channel... | 03/03/1992 |
| 5076399 | Elevator start control technique for reduced start jerk and acceleration overshoot Start jerk and acceleration overshoot on elevator starting are reduced by bypassing and delaying application of an elevator closed loop velocity control system. A bypassing starting torque increases the torque of the motor before the onset of motion, at w... | 12/31/1991 |
| 5075545 | Optical measurement of the position of an object The invention teaches determining position with light by providing amplitude modulated input light at an input light port of an optical cavity having a variable length dimension, detecting light at an output light port of the optical cavity and varying th... | 12/24/1991 |
| 5072218 | Contact-analog headup display method and apparatus Images are provided to a pilot in an aircraft overflying the earth by means of a helmet mounted display system. The position and attitude of the aircraft with respect to the earth and the attitude of the helmet with respect to the aircraft are monitored i... | 12/10/1991 |
| 5058710 | Elevator power source device A simplified elevator power system using an AC-DC converter, both to convert AC to DC during normal operation and to convert stored DC power to AC during power failures. A power source monitoring relay monitors AC power coming from a utility, and upon pow... | 10/22/1991 |
| 4992934 | Reduced instruction set computing apparatus and methods A reduced instruction set computer (RISC) with a Harvard architecture is disclosed. The RISC may be designed to be used simply as a RISC or may be designed to be used to emulate a complex instruction set computer (CISC). Or, it may be designed for use as ... | 02/12/1991 |
| 4982816 | Speed control system for elevators 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 actu... | 01/08/1991 |
| 4980824 | Event driven executive Tasks may be planned for execution on a single processor or are split up by the designer for execution among a plurality of signal processors. The tasks are modeled using a design aid called a precedence graph, from which a dependency table and a prerequi... | 12/25/1990 |
| 4975627 | Brake sequenced elevator motor speed control In an elevator, an electric motor is connected to a brake through a gearbox. The brake is controlled with an electromagnet. A torque signal is applied to the motor. Brake voltage characteristics are used to detect actual brake engagement and to signal a s... | 12/04/1990 |
| 4964804 | Training kit A training or servicing kit comprises a portable electronic simulation of an apparatus, the simulation including manually operable means to sense and/or control parameters of the simulation, and a computer with associated software serving in use to lead a... | 10/23/1990 |
| 4959782 | Access arbitration for an input-output controller Arbitration access to an IOC's RAM between the IOC's I/O bus and a signal processor is accomplished by always granting the signal processor access to the IOC's RAM for one machine cycle and disallowing any signal processor operations which would otherwise... | 09/25/1990 |
| 4954726 | Switching an inverter with stored signal sequences A method and apparatus is disclosed for generating thyristor gating signals for a force commutated inverter in order to produce variable frequency pulse-width modulated output waveforms with the appropriate percent fundamental voltage content for reactive... | 09/04/1990 |
| 4953059 | Spring loaded multi-wedge card retainer A plurality of trapezoidal wedges in a channel for retaining a PCB heat sink are held in place by spring force provided by a compression spring inside the bottom end wedge. The compression forces provided by the spring are mainly effective to prevent twis... | 08/28/1990 |
| 4933836 | n-Dimensional modular multiprocessor lattice architecture A plurality of n-dimensional modular entities are internally interconnected via as many as n duel port random access memory devices (DPRs), each memory device dedicated solely to the interchange of information between two modular entities in an n-dimensio... | 06/12/1990 |
| 4903187 | Control for variable frequency drive A star-connected sensing resistor at the A.C. output side of a PWM inverter detects an output voltage across the resistor, a PWM control according to the invention then amplifies the detected voltage, compares the amplified voltage with a sine wave voltag... | 02/20/1990 |
| 4893261 | Apparatus and method for determining airspeed and direction Aircraft speed and direction are determined by sampling the sinusoid-like pressure variations at the end of a rotor and performing a Fourier analysis on the pressure samples. Fourier quadrature component signals are used to determine aircraft direction an... | 01/09/1990 |
| 4890284 | Backup control system (BUCS) A backup software program is installed in an isolated portion in the memory of at least one of redundant computers. The backup program performs basically the same functions as the prime program but is dissimilarly programmed to prevent a common software e... | 12/26/1989 |
| 4885475 | Precision 50 percent duty cycle controller A sine wave locked in phase and frequency to a carrier having a high second harmonic content, carrying information on the magnitude of a parameter, is applied to an open loop operational amplifier which provides a trapezoidal waveform to a high speed, dif... | 12/05/1989 |
| 4878046 | Mounting a cathode ray tube for a heads-up display system A method and apparatus for a helmet mounted display with a cathode ray tube for mounting on the torso of the operator are disclosed. A disconnectable cable supplies an information bearing signal to a signal conditioning circuit for mounting on the torso o... | 10/31/1989 |
| 4874063 | Portable elevator traffic pattern monitoring system A plurality of components are mounted within a portable housing which may be mounted inside an elevator car on top of the door frame. The components comprise a people sensing means for detecting individual persons entering and leaving the elevator car and... | 10/17/1989 |
| 4845617 | Autofeather state maintenance Each engine of a multi-engine aircraft is monitored to determine if it has become inoperative during a critical flight mode such as takeoff or landing. If so, the propeller of the inoperative engine is feathered and the remaining engine or engines is uptr... | 07/04/1989 |
