Communications: electrical – External condition vehicle-mounted indicator or alarm – Transmitter in another vehicle
Reexamination Certificate
2005-08-23
2005-08-23
Swarthout, Brent A. (Department: 2636)
Communications: electrical
External condition vehicle-mounted indicator or alarm
Transmitter in another vehicle
C340S435000, C246S292000
Reexamination Certificate
active
06933858
ABSTRACT:
A system and method for automatically detecting the presence of an obstacle located within a surveillance area associated with a railroad grade crossing. The system includes a transmitter transmitting a signal through the surveillance area and a modulating reflector receiving the transmitted signal. The modulating reflector includes a phase modulator receiving the received signal and generating a phase modulated signal having a characteristic. The modulating reflector transmits the phase modulated signal through the surveillance area that is received by a receiver located to receive the phase modulated signal. The system further includes a processor coupled to the transmitter and to the receiver, the processor being configured to process the received phase modulated signal and to initiate an action as a function of the characteristic in the received phase modulated signal.
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Beusse Brownlee Wolter Mora & Maire P.A.
General Electric Company
Mora, Esq. Enrique J.
Rowold, Esq. Carl A.
Swarthout Brent A.
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