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7756613 Signaling system  
Trains and points are patrolled by a telegram containing the block occupancy information as a section that only one train is permitted to occupy, the information for giving lock position...
7706934 Portable guide device and portable telephone  
A portable guide device is characterized by comprising a transport facility start judgment means for judging that a transport facility has begun to move if a period where an acceleration detected...
6234428 Selective data transmission process and device for communication systems used in traffic engineering  
A process is disclosed for communication systems used in traffic engineering and having an earthbound transponder for each corresponding track section. The transponders transmit first data through...
5554982 Wireless train proximity alert system  
A wireless train proximity alert system provides a constant warning signal to warn vehicles approaching a train crossing when a train is also approaching the crossing. The system includes a...
5136225 Device for guiding vehicles on a virtual track  
A vehicle guidance system for guiding a vehicle on a virtual track includes a waveguide connected to a member emitting electromagnetic radiation at a frequency between 1 and 100 kHz and disposed on...
4910793 Two-way transmission system for ground/mobile station communications  
Information is transmitted at microwave frequencies, the ground station being connected to a waveguide (25) and the station aboard a railway vehicle being connected to an antenna (26). Each station...
4232318 Duplex microwave radio communication system  
A duplex microwave radio communication and telemetry system for transmitting analog and digital data between fixed stations as well as to mobile stations wherein the microwave oscillator is...
4207569 Railroad radio frequency waveguide  
Disclosed is a waveguide for conducting radio frequency signals along a railroad line comprising the ballast, ties and rails of the railroad line. If the waveguide is utilized for intra-train...
3001063 Selective radio communication between way stations and control office  
2883521 Radio dispatching system for railroad use  
Matches 1 - 10 out of 10