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US6009554A
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Systems safety vital arbiter employing numerical techniques
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US6102387A
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Automated sheet dispenser
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AU1144497A
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Vital point-to-point communications with multidrop network configuration
|
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US5586737A
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Switch machine cam bar
|
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US5669587A
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Point detection and indication with latch out means
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US5867801A
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Remote asset monitoring system
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US5633628A
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Wheelset monitoring system
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AU3490995A
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Switch machine
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WO9602903A1
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Smart bolt device having communications system in separate housing from bolt
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US5671348A
|
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Non-vital turn off of vital output circuit
|
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US5590857A
|
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Trailing device for a railroad switch layout
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US5504405A
|
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Switch machine controller with fail safe mechanism
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US5582370A
|
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Switch machine with ratchet mechanism on hand throw mechanism
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US5494242A
|
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Low profile switch machine with hand throw or motor throw selector device
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US5438322A
|
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Thermal sensor for detection of potential mechanical failures and transmission of temperature warning signals
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CA2108198A1
|
|
Railway light signal
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US5356098A
|
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Communication system for transmitting RF signals representative of defects or hazards in a railway system having frangible glass activation
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US5364047A
|
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Automatic vehicle control and location system
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EP0694169A4
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Relay tester
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AU2923592A
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Relay tester
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