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"There is practically no chance communications space satellites will be used to provide better telephone, telegraph, television, or radio service inside the United States."
T. Craven, FCC Commissioner ; 1961
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| Number | Title | Issue Date |
| 5488733 | Propulsion control system cental processing unit board For use in a propulsion control system, a microprocessor based central processing unit board includes both Multibus I and Multibus II interfaces. Multibus I master interface and Multibus slave interface controllers are designed for high data throughput by... | 01/30/1996 |
| 5475818 | Communications controller central processing unit board A microprocessor based data communications controller board includes at least one microprocessor and is for controlling communications over a plurality of busses having different electrical specifications and using different communications procedures. The... | 12/12/1995 |
| 5463552 | Rules-based interlocking engine using virtual gates A method of implementing a computer based interlocking system for automatic train protection includes providing a data base of prestored rule sets for a plurality of guideway objects, the guideway objects being represented as one or more virtual gates of ... | 10/31/1995 |
| 5404465 | Method and apparatus for monitoring and switching over to a back-up bus in a redundant trainline monitor system A method A and apparatus for monitoring and switching over from a primary bus to a back-up bus in a network having a master node and at least one slave node, the primary bus and the back-up bus each interconnecting the master node and the at least one sla... | 04/04/1995 |
| 5377356 | Propulsion control system central processing unit board For use in a propulsion control system, a microprocessor based central processing unit board includes both Multibus I and Multibus II interfaces. Multibus I master interface and Multibus slave interface controllers are designed for high data throughput by... | 12/27/1994 |
| 5353413 | Method and apparatus for christening a trainline monitor system A method for initializing a communication network in a train including a plurality of cars, the network comprising a train bus, a train bus master on one of the cars and a train bus slave on each other car connectable to the train bus master by the train ... | 10/04/1994 |
| 5323014 | Optocoupler built-in self test for applications requiring isolation An optocoupler circuit arrangement includes an isolated power source for producing a bipolar test signal, an analog multiplexer switching matrix coupled to the isolated power source for receiving and distributing the test signal, control logic for control... | 06/21/1994 |
| 5293632 | Method and apparatus for load shedding using a trainline monitor system A method for controlling power consumed by a plurality of subsystems on a multi-car train having a plurality of power supplies connected in parallel for supplying power to the subsystems. The train has a train wide communication network which includes a v... | 03/08/1994 |
| 5289176 | Multi-master resolution of a serial bus A method and apparatus for determining an overall master node for an overall communication network with a serial bus, wherein the overall communication network comprises an original communication network connected to a new communication network via a seri... | 02/22/1994 |
| 5265832 | Distributed PTU interface system A system for testing a plurality of subsystems in a multi-car train over a train-wide communications network includes at least one master station and a plurality of slave stations interconnected by the train-wide communications network, each station colle... | 11/30/1993 |
