Cab signalling system utilizing coded track circuit signals
First Claim
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1. A railway vehicle cab signalling system for providing electrical signals to operate on-board traffic control indicators based upon coded track circuit signals carried by a track circuit current, said system comprising:
- shunt path means comprising at least one railway vehicle wheel and axle set for conducting at least a portion of said track circuit current;
sensor means adjacent said shunt path means for detecting said at least a portion of said track circuit current conducted through sad shunt path means and producing a detection signal; and
processing means for receiving said detection signal and producing a display signal to operate said traffic control indicators.
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Abstract
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 track circuit current as it passes through at least one wheel and axle set on the vehicle. A processor receives an output signal from the sensor and produces a signal to operate the aspect display unit.
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Citations
15 Claims
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1. A railway vehicle cab signalling system for providing electrical signals to operate on-board traffic control indicators based upon coded track circuit signals carried by a track circuit current, said system comprising:
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shunt path means comprising at least one railway vehicle wheel and axle set for conducting at least a portion of said track circuit current; sensor means adjacent said shunt path means for detecting said at least a portion of said track circuit current conducted through sad shunt path means and producing a detection signal; and processing means for receiving said detection signal and producing a display signal to operate said traffic control indicators. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A railway vehicle cab signalling system for providing electrical signals to operate on-board traffic control indicators based upon coded track circuit signals carried by a track circuit current, said system comprising:
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shunt path means comprising at least one railway vehicle wheel and axle set for conducting at least a portion of said track circuit current; sensor means adjacent said shunt path means for detecting said track circuit current and producing a detection signal; said sensor means having at least one toroid constructed of two generally semicircular members generally defining an opening for at least partially circumscribing at least a portion of said axle of said wheel and axle set; and processing means for receiving said detection signal and producing a display signal to operate said traffic control indicators.
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8. A railway vehicle cab signaling system for providing electrical signals to operate on-board traffic control indicators based upon coded track circuit signals carried by a track circuit current, said system comprising:
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shunt path means comprising at least one railway vehicle wheel and axle set for conducting at least a portion of said track circuit current; sensor means adjacent said shunt path means for detecting said track circuit current and producing a detection signal; said sensor means having at least one toroid generally defining an opening for at least partially circumscribing at least a portion of an axle of said wheel and axle set; said toroid having a winding thereon to form a current transformer; and processing means for receiving said detection signal and producing a display signal to operate said traffic control indicators.
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9. A railway vehicle cab signalling system for providing electrical signals to operate on-board traffic control indicators based upon coded track circuit signals carried by a track circuit current, said system comprising:
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shunt path means comprising at least one railway vehicle wheel and axle set for conducting at least a portion of said track circuit current; sensor means adjacent said shunt path means for detecting said track circuit current and producing a detection signal; said sensor means having at least one toroid generally defining an opening for at least partially circumscribing at least a portion of an axle of said wheel and axle set; said toroid further defining a gap, said sensor means further comprising a magnetic field sensor mounted within said gap; and processing means for receiving said detection signal and producing a display signal to operate said traffic control indicators.
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10. A railway vehicle cab signalling system for providing electrical signals to operate on-board traffic control indicators based upon coded track circuit signals carried by a track circuit current, said system comprising:
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shunt path means comprising at least one railway vehicle wheel and axle set for conducting at least a portion of said track circuit current; sensor means adjacent said shunt path means for detecting said track circuit current and producing a detection signal; said sensor means comprising a transformer having a toroidal core, said said transformer mounted encircling an axle of said railway vehicle wheel and axle set; and processing means for receiving said detection signal and producing a display signal to operate said traffic control indicators.
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11. A method of railway vehicle cab signalling comprising the steps of:
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(a) establishing at least one shunt path on-board a railway vehicle conducting at least a portion of a track circuit signal current carrying a coded track circuit signal; (b) detecting said portion of said track circuit current conducting through said shunt path; (c) providing a track circuit current detection signal analogous to said track circuit current; (d) isolating said coded track circuit signal from said track circuit current detection signal; and (e) interpreting said track circuit signal to operate traffic control indicators located on-board said railway vehicle. - View Dependent Claims (12, 13, 14, 15)
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Specification