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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7832534 | Device for transmitting electrical energy from the track to the vehicle of a magnetic levitation railway A device for transmitting electrical energy from the track (2, 3) to the vehicle (1) of a magnetic leviation railway is described. According to the invention a contactless operating device is provided in that the track (2, 3) has mounted thereon... | 11/16/2010 |
| 7635053 | Transport system with inductive energy transfer A transport system is provided, comprising an underfloor high frequency alternate current primary conductor for providing an electromagnetic field extending along the primary conductor for inductive energy transfer. The transport system includes at least one electri... | 12/22/2009 |
| 7398946 | Power line sentry charging A rechargeable battery energized unmanned aerial vehicle having surveillance capability and an ability to clandestinely collect propulsion and other energy needs from a conveniently located and possibly enemy owned energy transmission line. Energy collection is by w... | 07/15/2008 |
| 7336156 | Communication apparatus, communication method and installation method of railway vehicle-facility intra communication system A communication apparatus installed in the trains and that in a complex station building, a station or a maintenance factory communication through feeders, trolley wires or third rails can communicate each other. The present invention can realize a low cost vehicle-... | 02/26/2008 |
| 7318564 | Power line sentry charging A surveillance aircraft recharging system based on energy collection by magnetic induction from the current flowing in a randomly selected alternating current transmission line conductor. The charging energy originates in the magnetic field surrounding the current c... | 01/15/2008 |
| 7288860 | Magnetic transducer with ferrofluid end bearings An electrical generator includes one or more magnets that move relative to one or more conductors to generate an electrical signal in each conductor. Each magnet has ferrofluid bearings in the vicinity of its opposite ends to provide a low friction interface between... | 10/30/2007 |
| 7279850 | Decoupling circuits Power taken inductively from the alternating current in a track is received by a resonant circuit which is output controlled by a switching circuit asynchronous with the frequency of the power supply. The switch on and off time is controlled to regulate the output p... | 10/09/2007 |
| 7243604 | Hidden-rail and dual-attraction balancing compensation type permanent magnetic levitation train and railway system A hidden-rail dual-attraction balancing compensation type permanent magnetic levitation train and railway system are provided. The hidden rails are provided inside two underground tubes, and each tube is communicated with the ground via a rail through silt. A magnet... | 07/17/2007 |
| 7232020 | Telpher line with contactless energy and data transmission In an electric telpher system with non-contact power transmission between a feeder (4) placed at a spacing along a slide rail (1) for mobile transfer units (12) and an inductive current collector on the transfer unit, a data transmission loop ( | 06/19/2007 |
| 7199493 | Alignment stage apparatus An alignment stage apparatus includes a base structure and a movable stage which can move along a surface of the base structure so as not to be in contact with the base structure. The apparatus includes a plurality of power transmission coils buried under the surfac... | 04/03/2007 |
| 7183751 | Reactive power compensator device A reactive power compensator device includes an AC capacitor and a small-capacity power converter serially connected thereto that avoid the problems of power resonance and harmonic current injection. The reactive power compensator device provides with compensation r... | 02/27/2007 |
| 7164211 | Vehicle assisted power generator A system and method whereby power pods having multiple permanent magnets or coils of wire with a very low voltage charge create a multiple magnetic fields within frequently traveled roadways and other surfaces so that voltage is created when vehicles carrying ferrou... | 01/16/2007 |
| 7137494 | Device for the contactless transfer of electrical energy A device with which electrical energy can be transferred from a power cable running along a stationary rail of a transport system to a moving element that can be driven along the rail. Each moving element has for this purpose a transfer head which works inductively ... | 11/21/2006 |
| 7126529 | Method and system for selective control of charging a power source The invention concerns a method (200) and system (100) for selective control of charging a power source (122). The method can include the steps of charging (212) the power source of an electronic device (136) in which the electroni... | 10/24/2006 |
| 7116540 | Device for inductively transmitting electrical energy A device for inductively transmitting electrical energy to at least one mobile load, with at least one primary conductor that extends along a designated path of the load in the form of a conductor loop and from which a secondary conductor arranged on the load is abl... | 10/03/2006 |
| 7084534 | Alignment stage apparatus An alignment stage apparatus including a base structure and a movable stage, which can move along a surface of the base structure so as not to be in contact with the base structure. The apparatus includes a plurality of power transmission coils buried under the surf... | 08/01/2006 |
| 7084527 | Electric suspended conveyor with contactless energy transmission In an electric telpher or similar conveyor system comprising movable transfer units, power is transmitted to consumers having differing input power requirements in that the slide rail (1) is also used as return conductor of the feeder (4) in the primar... | 08/01/2006 |
| 7061131 | Method and system for optimizing energy storage in hybrid off-highway vehicle systems and trolley connected OHV systems A hybrid energy system for propelling an off-highway vehicle includes an engine rated at a first power capacity, and a power converter driven by the engine for providing primary electric power. A traction motor system receives the primary electric power, the tractio... | 06/13/2006 |
| 6978873 | Connection structure of induction line cover An induction line cover includes a cylinder-shaped section into which an induction line can be fitted, plate-shaped sections continuously connected outwardly from a pair of ends created by cutting a slit longitudinally in the cylinder-shaped section at a circumferen... | 12/27/2005 |
| 6954053 | Interface for shunt voltage regulator in a contactless smartcard The present invention provides shunt voltage regulation by employing a rectifying means to rectify an incoming signal and a current sinking means to divert current from the output of the rectifying means in such a way that the output voltage is maintained at an appr... | 10/11/2005 |
| 6951268 | System for transmitting energy and/or data between a vehicle body and a removable part A system is proposed for transmitting energy and/or data between a vehicle body and a removable part, a first core half having a pin and a pin ring which extend into a second core half to thus improve an inductive coupling. The first and second core halves are eleme... | 10/04/2005 |
| 6952086 | Linear position sensing system and coil switching methods for closed-loop control of large linear induction motor systems A control system for a linear motor adapted to accurately supply a moving window of power to the stator coils. A plurality of individually switched stator coils run the length of a linear motor to move a rotor down the long axis of the stator. Accurate inductive-bas... | 10/04/2005 |
| 6931304 | Scalable means of supplying power to a remotely controlled, semi-autonomous robot An automated library system having multiple storage cells for storing multiple data cartridges. Rails are provided adjacent to the storage cells to guide one or more robots among the storage cells. Primary coils are disposed proximate the rails. A power supply produ... | 08/16/2005 |
| 6927546 | Load control system and method A load control systems and methods. One embodiment of a load control system comprises at least two triac devices connected in parallel to a load, the at least two triac devices operable to deliver current to the load. At least one driver circuit is linked to the at ... | 08/09/2005 |
| 6917136 | Synchronous machine design and manufacturing Synchronous motors according to the invention operate at higher efficiency, with lower cost, reduced mass and reduced cogging. Magnet dimensions are selected that reduce cogging forces to a negligible amount even though there are fewer slots than normal. Optionally,... | 07/12/2005 |
| 6848547 | Non-contact electric power supply system for a rail-guided vehicle A non-contact electric power supply system for a rail-guided vehicle includes a main line having fixed rails for guiding the vehicle. A movable rail body is provided for changing the course of the vehicle moving along the main line. A first high frequency power supp... | 02/01/2005 |
| 6705441 | Control of series-resonant inductive pickups A series resonant inductive pickup has a bi-directional solid state switch in series with an inductor and a capacitor is controlled by switch control elements capable of causing the switching elements to repetitively be in either an open or a closed state, so that b... | 03/16/2004 |
| 6651566 | Transportation system A transportation system includes a guideway lane and a power cable assembly extending along the guideway lane. The system further includes a vehicle configured to travel on the guideway lane. The vehicle includes a self-centering transformer that is movab... | 11/25/2003 |
| 6615740 | Machine for transport of passengers and cargo An electrically powered vehicle transportation system utilizes a guideway with parallel enclosed rails. Each enclosed rail has an electrical bus bar for supplying power to vehicles on the guideway. The guideway will accommodate dual-mode vehicles that are... | 09/09/2003 |
| 6543591 | Automated guided vehicle system An automated guided vehicle system can make a conveyor vehicle 13 traveled from a feeder line 5 disposed along a track 12 by supplying the power in a physically non-contact state, wherein the feeder lines are disposed in the both sides of a part of the tr... | 04/08/2003 |
| 6515878 | Method and apparatus for supplying contactless power A method and apparatus for supplying contactless power. Electrical power is transferred from a power source to a load through a primary energy converter that can be connected to the power source, through a primary inductive loop connected to the primary e... | 02/04/2003 |
| 6425468 | Non-contact power supply apparatus and pickup portion used therein The present invention provides a non-contact power supply apparatus which is suitable for three-dimensional running by improving an allowable degree in a relative displacement of a carrier vehicle and a guide rail in the case where the carrier vehicle is ... | 07/30/2002 |
| 6407470 | Electric power transmission device An electric power-transmission device having a primary conductor arrangement comprising at least two parallel primary conductors (PL) and at least one secondary winding arrangement that is electromagnetically coupled to the primary conductor arrangement, ... | 06/18/2002 |
| 6397990 | Materials transport system having inductive power transfer An inductive power transfer apparatus is provided which is especially useful for a semiconductor wafer handling system or other similar type of materials transport system in which one or more cars are moveable along a track. The system includes a pluralit... | 06/04/2002 |
| 6265791 | Device for contactless transmission of electric energy An energy transmission device allows several consumers to be supplied with energy independent of one another and provides contactless transmission of energy from a primary current line, through which alternating current flows, to a number of secondary, re... | 07/24/2001 |
| 6213269 | Power supply for a longitudinal stator drive A power supply system for a long-stator drive having at least two independent tracks, which each have at least one long-stator section and which can be connected to one another using at least one track-changing device, the long-stator sections being split... | 04/10/2001 |
| 6109405 | Non-contacting power supply system for rail-guided vehicle In a non-contacting power supply system for a rail-guided vehicle which can move along a plurality of power supply lines connected to respective power sources and receive a supply of electric power required for moving from the plurality of power supply li... | 08/29/2000 |
| 6095054 | Transport system A transport system has a track provided along a transport route forming a main route and at least one branch route connected to the main route at a branch point. A first power supply line is provided along the main route; a second power supply line is pro... | 08/01/2000 |
| 6089512 | Track-guided transport system with power and data transmission A track-guided transport system with power and data transmission and used for conveying goods. The transport system is provided with a transport element having drive and track-guide elements; storage, input and output units for goods; and a data processin... | 07/18/2000 |
| 6089362 | Non-contact power supply device and method for conveyor carriage An apparatus for feeding electric power to a movable body in a non-contact manner. Power lines on which electric power is transmitted are laid on a guide rail. The movable body is powered by the electric power from the power lines. A plurality of pick-up ... | 07/18/2000 |
