Tactile and audible warning system for railroad workers
First Claim
1. A train warning system for warning personnel in proximity to railroad tracks of an approaching train, the system comprising:
- a train sensor operable with the railroad tracks for detecting passage of a train over the railroad tracks at a given location, wherein the train sensor generates a a train sensor signal upon detecting passage of a train over the railroad tracks at the given location;
a transmitter disposed on the train and operable with the train sensor for transmitting a warning signal upon receipt of the train sensor signal; and
a portable radio frequency (RF) receiver carried by at least one of the personnel in proximity to the railroad tracks remote from the railroad tracks at the given location for receiving the warning signal transmitted by the transmitter, whereupon receiving the warning signal the portable RF receiver generates an alarm to notify the at least one of the personnel of the approaching train.
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Accused Products
Abstract
A train warning system and method for warning personnel in proximity to railroad tracks of an approaching train includes a train sensor operable with the railroad tracks for detecting passage of a train over the railroad tracks at a given location. The train sensor generates a train sensor signal upon detecting passage of a train over the railroad tracks at the given location. A transmitter is operable with the train sensor for transmitting a warning signal upon receipt of the train sensor signal. A portable radio frequency (RF) receiver is carried by at least one of the personnel in proximity to the railroad tracks remote from the railroad tracks at the given location for receiving the warning signal transmitted by the transmitter. The portable RF receiver generates an alarm signal to notify the at least one of the personnel of the approaching train upon receipt of the warning signal.
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Citations
20 Claims
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1. A train warning system for warning personnel in proximity to railroad tracks of an approaching train, the system comprising:
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a train sensor operable with the railroad tracks for detecting passage of a train over the railroad tracks at a given location, wherein the train sensor generates a a train sensor signal upon detecting passage of a train over the railroad tracks at the given location; a transmitter disposed on the train and operable with the train sensor for transmitting a warning signal upon receipt of the train sensor signal; and a portable radio frequency (RF) receiver carried by at least one of the personnel in proximity to the railroad tracks remote from the railroad tracks at the given location for receiving the warning signal transmitted by the transmitter, whereupon receiving the warning signal the portable RF receiver generates an alarm to notify the at least one of the personnel of the approaching train. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for warning personnel in proximity to railroad tracks of an approaching train, the method comprising:
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detecting passage of a train over the railroad tracks at a given location with a train sensor; generating a train sensor signal upon detecting passage of a train over the railroad tracks at the given location; transmitting a warning signal from a transmitter disposed on the train and operable with the train sensor upon receipt of the train sensor signal by the transmitter; receiving the warning signal from the transmitter with a portable radio frequency (RF) receiver carried by at least one of the personnel in proximity to the railroad tracks remote from the railroad tracks at the given location; and generating an alarm to notify the at least one of the personnel of the approaching train upon receipt of the warning signal by the portable RF receiver. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification