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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 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 |
| 7210656 | Control, sound, and operating system for model trains A model train operating, sound and control system that provides a user with increased operating realism. A novel remote control communication capability between the user and the model trains. This feature is accomplished by using a handheld remote control on which v... | 05/01/2007 |
| 7198235 | Method and apparatus for the transmission of information between track and vehicle of a model railroad A method and apparatus for the transmission of information between a track (11, 12) and a vehicle (13, 14) located on the track in a model railroad system, whereby when electrical contact between the vehicle and track, such as between a wheel of the ve... | 04/03/2007 |
| 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 |
| 7158012 | Non-invasive powerline communications system A non-invasive powerline communications system includes: means for generating communication signals at a first location for transmission on a powerline; means for reactively coupling the communication signals to the powerline; and means for receiving said communicat... | 01/02/2007 |
| 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 |
| 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 |
| 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 |
| 6781524 | Passive position-sensing and communications for vehicles on a pathway A pathway-based method, apparatus and system for tracking, sensing and communicating with an object, such as a carriage or vehicle moving on a pathway. The system includes a transmitter winding along the pathway that is energized by a transmitter and one or more sen... | 08/24/2004 |
| 6527230 | Track receiver A track receiver is located on-board a locomotive for receiving a first magnetic field produced in response to a cab signal carrier transmitted through a rail on which the locomotive is carried. The track receiver is oriented so that a second magnetic fie... | 03/04/2003 |
| 6499701 | System for inductive transfer of power, communication and position sensing to a guideway-operated vehicle Inductive transfer methods and structures combine, in a single system, at least two of the three functions of transferring power, communicating data, and sensing position with a vehicle on a guideway. A set of conductors is installed on the guideway to in... | 12/31/2002 |
| 6168119 | Device for automatically locating a railway vehicle On vehicles on which only a single receiving antenna is provided or where a plurality of receiving antennas which are arranged side by side and are coupled to the forward and return conductors of a line conductor are provided, the phase angle of the recei... | 01/02/2001 |
| 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 |
| 5938151 | Communication systems employing power cables for conveyor carriages A system for communication between a fixed station and a carriage, which travels along a rail. The system employs a cable used to supply the carriage with electric power and carries out communication by superimposing communication signals on the electric ... | 08/17/1999 |
| 5927657 | Antenna mounting structure for movable member conveying system A carriage conveying system having a conveyance control device, which outputs communication signals for supplying a carriage with electric power by a feeder cable arranged along a guide rail to move the carriage along the guide rail and for controlling op... | 07/27/1999 |
| 5924653 | Traffic control system and method of controlling the movement of a mobile unit A traffic control system for mobile units has a plurality of stationary, passive units having electronic store capacity and transmit and receive facilities. The store of the passive units contains an information code which is unique to the unit and is rel... | 07/20/1999 |
| 5791602 | Plate antenna method using integral noise mitigation for railway cab signal Cab signalling apparatus for use on-board a vehicle which is propelled on tracks having a cab signal transmitted through rails. One or more plate mounted antenna is positioned above a rail to induce therein a signal representative of the cab signal curren... | 08/11/1998 |
| 5628478 | Cab signal pickup system with motor noise reduction Inductive pickups for sensing coded cab current information employ short ferrite cores and exhibit a pronounced roll-off characteristic to provide a detection system that may be used with locomotives powered by alternating current traction motors. Desired... | 05/13/1997 |
| 5622339 | Plate antenna method using integral noise mitigation for railway cab signal Cab signalling apparatus for use on-board a vehicle which is propelled on tracks having a cab signal transmitted through rails. One or more plate mounted antenna is positioned above a rail to induce therein a signal representative of the cab signal curren... | 04/22/1997 |
| 5586736 | Cab signal sensor with noise suppression Apparatus for sensing coded cab current information in a high level noise environment, caused by the magnetic fields of AC traction motors employed in the locomotive, utilizes pickup coils each having an upright axis and an axially extending, ferrite core... | 12/24/1996 |
| 5548815 | Inductive radio communication system An inductive radio communication system in which two sets of parallel lines are provided so as to be separated from each other at a predetermined distance therebetween along the track of a mobile unit, and a loop antenna having a double loop structure and... | 08/20/1996 |
| 5501416 | Method and apparatus for inductively receiving cab signaling on board a railway vehicle A cab signaling apparatus for use on board a railway vehicle which is propelled on rail tracks by an electric drive motor. The invention utilizes a cab signal transmitted to the vehicle through a track circuit in the rails. On board receiving of the cab s... | 03/26/1996 |
| 5501417 | Noise cancellation in railway cab signal A cab signaling apparatus for use on board a railway vehicle which is propelled on rail tracks by an electric drive motor. The invention utilizes a cab signal transmitted to the vehicle through a track circuit in the rails. On board receiving of the cab s... | 03/26/1996 |
| 5263670 | Cab signalling system utilizing coded track circuit signals A railway vehicle cab signalling system providing electrical signals to operate an aspect display unit or the like located on-board a railway vehicle based upon the track circuit signals typically used to operate wayside indicators. A sensor detects the t... | 11/23/1993 |
| 5242136 | Railway signalling systems A railway signalling system for the detection of a train within a defined section of track by means of track circuit apparatus utilizes the rails within the section as part of the track circuit. The rails are electrically shunted by the wheels and axles o... | 09/07/1993 |
| 5234184 | Locomotive axle mounted cab signaling sensor A sensing device mounted on a railway locomotive vehicle axle assembly to sense signalling currents conducted through the axle. The device also serves to protect the critical traction motor support bearing from contamination by foreign substances. The sen... | 08/10/1993 |
| 5000279 | Unmanned vehicle guide system An unmanned vehicle guide system has guide routes made of a magnetic material and an unmanned vehicle guided to travel on the guide route. The unmanned vehicle has an exciting coil for emitting a magnetic field, a pair of detection coils, arranged in a di... | 03/19/1991 |
| 4947759 | Proximity control system A proximity switching system comrising a plurality of self-propelled vehicles mounted in tandem on a track and carrying magnetic proximity switches for controlling the vehicle propulsion. Each vehicle has a first magnet mounted on the front end at a first... | 08/14/1990 |
| 4449685 | Coupling for inducing a current in the rails of a railroad track The purpose of the invention is to reduce the total power consumed by a coupling for inducing a high-frequency alternating current in the rails of a railroad track for the purpose of transmitting information to trains traveling along the track. According ... | 05/22/1984 |
