Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8183813 | Power supply arrangement The invention relates to a frequency converter, which is fitted to supply power between a polyphase alternating electricity source and an electric machine. The frequency converter comprises a network rectifier connected to the alternating electricity source and an i... | 05/22/2012 |
| 8177033 | Transportation system with capacitive energy storage and non-volatile memory for storing the operational state of the transportation system upon detection of the operational anomaly in power A transportation system and a method are provided for backing up the operational state of a transportation system. The transportation system includes a control apparatus for controlling the operation of the transportation system. The control apparatus further includ... | 05/15/2012 |
| 8151942 | Configurable communication system for a building The present invention deals with a method and system for producing services in the communication system of a building. In the method of the invention, the communication system includes at least one terminal device applicable for local-area communication, at least on... | 04/10/2012 |
| 8141684 | Method for installing an elevator, and elevator An elevator, preferably an elevator without counterweight, comprising a number of diverting pulleys in the upper part of an elevator shaft or equivalent, a number of diverting pulleys in the lower part of the elevator shaft and a number of diverting pulleys on an el... | 03/27/2012 |
| 8132652 | Elevator system including plurality of elevators operating in same hoistway An elevator system includes at least one shuttle elevator and at least two local elevators, the elevator cars of which are arranged to travel in the same elevator hoistway such that they can serve at least one shared transfer floor of a transfer level. The control s... | 03/13/2012 |
| 8127893 | Elevator and arrangement An elevator having an elevator car with a car frame on which are mounted a first set of diverting pulleys from which the hoisting ropes go downwards and a second set of diverting pulleys from which the hoisting ropes go upwards. The rope tension in the rope portions... | 03/06/2012 |
| 8123003 | Arrangement and method for determing the position of an elevator car using consecutive magnetic areas with magnetic poles of any two immediately adjacent consecutive magnetic areas of opposite directions to each other An arrangement and a method are provided for determining the position of an elevator car in the elevator hoistway. The arrangement includes a measuring apparatus fitted in connection with the elevator car. The measuring apparatus is arranged to form an electromagnet... | 02/28/2012 |
| 8118140 | Elevator system with a controller of fast start of travel and method in conjunction with the same An elevator system and a method for accelerating the starting of travel in an elevator system are provided. The elevator system includes an elevator control system for implementing controlled motion of an elevator car; a door mechanism control system for implementin... | 02/21/2012 |
| 8118138 | Method for installing an elevator A method for installing an elevator may include stopping an elevator car or partially completed elevator car in the upper part of an elevator shaft; rigging first portions of hoisting ropes between the car and diverting pulleys in the upper part of the shaft so that... | 02/21/2012 |
| 8115633 | Tracking system A method for tracking objects includes providing each of at least two different objects with a transmitter having individualized identifier data; logically connecting the objects to each other by connecting the identifier data of the transmitters to each other; reco... | 02/14/2012 |
| 8113319 | Elevator and system and method for locking an elevator car in place An elevator may include an elevator car, one or more hoisting ropes, a traction sheave, an overspeed governor, at least one safety gear, a locking mechanism, and guide rails. The car may be suspended by the one or more hoisting ropes. The traction sheave may move th... | 02/14/2012 |
| 8112861 | Method for replacing the hoisting roping of an elevator and a traction appliance arrangement used in the replacement The present invention relates to a method and a traction appliance arrangement for replacing the hoisting roping of an elevator, which elevator comprises at least guide rails (10) along which an elevator car (7) provided with safety gear (7a | 02/14/2012 |
| 8096387 | Fail-safe power control apparatus with controllable change-over switches A fail-safe power control apparatus for supplying power between an energy source and the motor of a transport system. The power control apparatus includes a power supply circuit, which has at least one converter containing controllable change-over switches, and the ... | 01/17/2012 |
| 8083033 | Elevator system with control to allocate a call based on charging status of energy storage, and method of controlling an elevator group An elevator system and a method are provided for controlling an elevator group. The elevator system includes an elevator group, which includes at least two elevator cars, which elevator cars are fitted to be moved in the elevator hoistway according to the calls allo... | 12/27/2011 |
| 8069955 | Elevator and traction sheave of an elevator An elevator may include an elevator car, a counterweight, a set of hoisting ropes, and one or more rope pulleys. The car and counterweight may be suspended on the hoisting ropes. At least one rope pulley may include a solid surface including a plurality of rope groo... | 12/06/2011 |
| 8054019 | Method and apparatus for controlling a motor The invention concerns a method and an apparatus for controlling a three-or-more-phase motor driven by a frequency converter. In the method, a change-over switch of the frequency converter is controlled to a continuously conducting state and at the same time the pha... | 11/08/2011 |
| 8053931 | Power control of transport system The power control of a transport system comprises an electric motor for moving the transport appliance as well as a power supply appliance of the motor, which comprises an intermediate circuit. The power supply appliance of the motor is fitted between the power sour... | 11/08/2011 |
| 8046890 | Roping method and apparatus Roping method and apparatus for replacing, installing and/or re-roping the hoisting rope of a traction sheave elevator, said elevator having an elevator car, which is at least partially suspended on a set of hoisting ropes, said set of ropes comprising one or more p... | 11/01/2011 |
| D647681 | Set of balustrade end parts of a passenger conveyor | 10/25/2011 |
| 8028393 | Elevator arrangement A method for installing the hoisting roping of an includes at least an elevator car provided with safety gear, the elevator car moving in essentially a vertical direction along guide rails in the elevator shaft, a hoisting machine, a traction sheave, and at least a ... | 10/04/2011 |
| 8020670 | Arrangement for equalizing elevator rope force and elevator An arrangement for equalizing rope force of an elevator may include: a hoisting machine, set of hoisting ropes, traction sheave, elevator car, guide rails, and compensating device. The hoisting machine may engage the hoisting ropes via the traction sheave. The eleva... | 09/20/2011 |
| 8020669 | Elevator and traction sheave of an elevator An elevator may include an elevator car, counterweight, set of hoisting ropes, and one or more rope pulleys. The elevator car and counterweight may be suspended on the set of hoisting ropes. The one or more rope pulleys may be provided with one or more rope grooves.... | 09/20/2011 |
| 7997000 | Arrangement and method for positioning the alignment plumb lines of the guide rails of an elevator An arrangement and a method are provided for positioning the alignment plumb lines of the guide rails of an elevator, more particularly when installing an elevator during the construction phase of a building. The solution includes at least actuators fixed above the ... | 08/16/2011 |
| 7996992 | Methods for mounting one or more ropes on a rope pulley A method for mounting one or more ropes on a rope pulley includes fitting a first end of the one or more ropes into one or more corresponding rope grooves of the rope pulley, attaching a rope holder to the rope pulley to press the first end of the one or more ropes ... | 08/16/2011 |
| 7992684 | Device for sealing escalator or moving walkway drives The invention relates to an escalator or moving walkway that includes a drive shaft rotating at a relatively low peripheral speed around a horizontal axis and at least one sealing element associated with the drive shaft. Lubricant is supplied to the drive shaft and ... | 08/09/2011 |
| 7980363 | Elevator safety arrangement having safety spaces An elevator safety arrangement and a method for implementing safety spaces in an elevator has a mechanical safety device which can be set to a working position to ensure a sufficient safety space in the elevator shaft and an electric safety system for identifying th... | 07/19/2011 |
| 7975809 | Method and arrangement for preventing disturbing noise caused by the counterweight of an elevator The invention relates to a method and an arrangement for preventing disturbing noise caused by the counterweight of an elevator. At first temporary tightening means (8), e.g. slings provided with tightening elements (9), are fitted and tightened around... | 07/12/2011 |
| 7971688 | Adjustment of transport system parameters using a power model A system and a method for the adaptation of parameters in a transport system involve a power model which describes power flow in the transport system by means of transport system parameters, which include input parameters and status parameters. The system and method... | 07/05/2011 |
| 7960865 | Apparatus and method for controlling the motor power The invention concerns a power control apparatus and a method for supplying power between an electric machine and an energy source. The power control apparatus contains at least two converters comprising a plurality of switches, at least some of which switches belon... | 06/14/2011 |
| 7954619 | Load sharing handrail drive apparatus A handrail drive apparatus is provided comprising a first drive wheel assembly configured to drive a handrail and comprising a planetary gear train arranged to be driven by a first driving member. The handrail drive apparatus further comprises a second drive wheel a... | 06/07/2011 |
| 7954607 | Method and arrangement for monitoring the safety of a transport system The invention relates to a method and an appliance for monitoring the safety of a transport system. The transport system includes a transport appliance and also a synchronous motor for moving the transport appliance. In the method, the motion information of the tran... | 06/07/2011 |
| 7950514 | Apparatus and method for variable torque braking of escalators and moving walkways A braking apparatus and method for an escalator or moving walkway are provided. The braking apparatus may include a braking element, a linearly controllable solenoid assembly, a biasing mechanism, and a control device. The braking element may be adapted to engage a ... | 05/31/2011 |
| 7937283 | Method for optimizing a maintenance program The present invention discloses a method and a computer program for optimizing the implementation of a maintenance program for maintenance units. In the method of the invention, an estimated duration is determined for each maintenance module, a periodic working capa... | 05/03/2011 |
| 7921969 | Restriction of output of electrical drive and protection of an elevator A method for restricting the output of an electrical drive and for protection of an elevator are provided. The electrical drive includes a motor as well as a power supply appliance of the motor. In the method for restricting the output of an electrical drive the sta... | 04/12/2011 |
| 7913819 | Set of elevators and method for controlling a set of elevators A set of elevators includes a plurality of elevators without counterweight, a power supply, and a common control system. The plurality of elevators has a common connection to the power supply. The common control system includes one or more instructions to prevent or... | 03/29/2011 |
| 7909143 | Elevator system with power consumption control The present invention pertains to a method for optimal routing of the elevators in an elevator system in a situation where the supply power received by the system is limited e.g. due to emergency power operation. In the invention, routes are optimized by using a cos... | 03/22/2011 |
| 7905330 | Door control safety arrangement for transportation system A system and a method for monitoring a safety circuit are presented. The system includes a control appliance and the safety circuit comprises at least one serial circuit of two or more switches. The arrangement system also includes a way of measuring the status of a... | 03/15/2011 |
| 7900750 | Elevator system The present invention discloses a method and a system for modernizing at least one elevator group, which comprises a plurality of elevators, a group control that controls the elevator group as well as call-giving appliances connected to the group control via the lan... | 03/08/2011 |
| 7896139 | Guide-rail brake A guide-rail brake (1) of an elevator and a method for controlling the brake are provided. The brake comprises a frame part fixed to the elevator car, a prong part, which contains turning jaws (3,4) that correspond to the guide rail (2) via the ... | 03/01/2011 |
| 7896138 | Elevator arrangement The invention concerns an arrangement and a method for controlling the power supply of the load of an elevator system. The arrangement has at least a monitoring unit and at least one controllable power source. The controllable power source is connected between the l... | 03/01/2011 |
