Matches 1 - 31 out of 31
Match Document Document Title
7623567 Method for transmitting data for controlling railway signal installations of a railway system  
A method for controlling railway signal installations of a railway system by exchanging data between directly adjacent transceivers over electrically conducting rails of a track is disclosed. More...
7357359 Electronic code follower relay  
An electronic code following relay for use in a railroad signaling system includes a timing circuit for receiving an input square wave signal coded at a pre-determined code rate, and regenerating...
7245993 Railway system with at least one track, and method for encoding data for transmission over the track  
A railway system with at least one track having at least two rails and a method for encoding data for this railway system are disclosed. Railway signaling systems are located proximate to the tract...
7200470 Train detection system and a train detection method  
A train detection system includes transmitters receivers connected to a track circuit for transmitting and receiving a train detecting signal to and from the track circuit, and a control device on...
6494409 Railway code following apparatus  
A solid state code following track relay receives pulsating rail current from a railway code transmitter. The track relay includes first and second inputs structured to receive the rail current....
6374165 Railway information transmission method and system  
In a railway information transmission method and system wherein information is transmitted by a consecutive transmission mode between on-vehicle control equipment and ground control equipment, a...
5820081 Process and circiuit arrangement for the transmission of digital control data  
The invention concerns a process and a circuit arrangment to transmit digital control data, preferably between a central station and individual locomotives of a model railway. In order to make...
5769364 Coded track circuit with diagnostic capability  
A track circuit with diagnostic capability differentiates between an occupied track circuit and one in which a conductor of the track circuit (one of the rails) is broken. Transceiver units are...
5720454 Audiofrequency track circuit with data transmission (digital TC); transceiver interface  
A track circuit is used in a railway plant or the like, and comprises a track segment which is isolated electrically from the adjacent segments by electrical splices which consist of a conductor...
5711497 Cab signaling apparatus and method  
The invention provides for a cab signaling apparatus and method for use on board a railway vehicle propelled on a set of spaced rails by a traction motor. The cab signaling apparatus may reduce a...
5507456 Reduced harmonic switching mode apparatus and method for railroad vehicle signaling  
A signaling apparatus that includes a transmitter having a step-square wave generator for generating a signaling waveform, which waveform is composed of a plurality of square wave signals, and...
5465926 Coded track circuit repeater having standby mode  
A coded railway track circuit apparatus is disclosed having the capability of operating during periods of low vehicle activity in a reduced power standby mode. This is accomplished by switching...
5330134 Railway cab signal  
An improved railway cab signal transmitter for transmitting a cab signal onto a pair of rails for reception by a railway vehicle on said rails. A tuning arrangement is connected across the rails to...
5330135 Railway track circuits  
A railway track circuit system is described, in which there is a transmitter 15,16 and receiver 19,20 at each end of a track circuit section 4. Each receiver receives signals from the transmitter...
5271584 Pulse code railway signalling system  
A railway signalling system uses coded electrical information signals to convey vital signal information to wayside signal locations. The coded information signals are in the form of unipolar...
5263669 Railway cab signal transmitter  
A transmitter for transmitting cab signal and track signal currents to a pair of rails includes the circuitry for mitigating runby currents which are not fully shunted by the rail vehicle. High...
5219426 Single-element coded alternating current railway track circuit having double-element, phase-selective capability  
The invention provides a single-element coded alternating current railway track circuit which may be adapted to a double-element Phase-Selective configuration. A transmitter, via a transmitter...
4732355 Rate code decoding system  
In railway signaling systems which transmit rate code signals along track circuits, which signals are picked up by the trains and used for signaling purposes, such as speed control, the rate code...
4720067 Method for increasing the number of signals which may be transmitted from a ground station to a rail vehicle  
To increase the number of different signals which may be transmitted from a ground station provided with a coder (17) to a rail vehicle (1) provided with a decoder (18) and being on a rail section...
4619425 Pulse code system for railroad track circuits  
An alternating current code, alternately transmitted in each direction through the rails of a railroad track section, includes a selected number of pulses of alternately positive and negative...
4582279 Modulation system for railway track circuits  
A modulation system for railway track circuits in which a modulated signal is applied to a section of track for the purpose of detecting the presence or absence of a train on the section. Such...
4494717 Vital transmission checking apparatus for communication channels  
Vital transmission checking apparatus is disclosed for a communication channel which transmits quasi-static signals representing several alternative states of a function, e.g., the control function...
4437632 Reset apparatus for railroad track circuits  
The two inputs of a first flip-flop (FF) are alternately energized over a pair of opposite contacts of a code transmitter. Outputs of a second FF alternately enable a pair of logic gates to pass...
4432517 Circuit for detecting unbalance of the traction current in a track circuit  
In order to prevent a false signal being given in a circuit arrangement for detecting the presence of rolling stock on a track section, when a rail is grounded or fractured, a detecting circuit...
4417229 Means for use on a railroad to distinguish between traction current and signal current  
Means for differentiating between traction current and signal current in an electrified railroad includes a first input transformer providing an input signal of the same frequency and phase as the...
4415134 Hall effect track circuit receiving element  
A railroad signal circuit includes a transmitter and a receiver which have a common connection to the track rails at one end of a signal block. There will be a similar transmitter and receiver at...
4320880 Electronic track current switching relay system  
An electronic system which emulates the operation of a polar relay for applying coded pulses to railway tracks has separate signaling circuits having signaling devices responsive to a separate...
4320881 Fail-safe decoder for digital track circuits  
A selected unique digital comma-free code word is transmitted through track section rails from one end and, when received at the other end, is applied serially to a shift register which supplies a...
4015082 Multi-channel signal decoder  
A signal decoder is disclosed for use in a transportation vehicle control system in which vehicle control signal information bits are transmitted according to a multiple message frequency, FM, PSK,...
3992698 Fail-safe speed command signal decoder  
In a typical transportation vehicle control system, coded control information is transmitted to the transportation vehicles on vehicle command signals comprised of multiple message frequencies. A...
3715669 RECEIVER FOR A FREQUENCY MODULATED OVERLAY TRACK CIRCUIT  
A receiver is provided for a frequency modulated overlay track circuit in which a frequency modulated signal having alternately occurring extreme side-band components is communicated along a...
Matches 1 - 31 out of 31