Railway switches and signals – Cab signal or train control – Speed-control systems
Patent
1982-03-01
1984-09-18
Groody, James J.
Railway switches and signals
Cab signal or train control
Speed-control systems
246 63R, 246187B, B61B 1316, B61L 300
Patent
active
044719299
ABSTRACT:
An apparatus and method for providing a control signal in front of a vehicle moving along a track having an earth ground potential, with the vehicle having first and second low impedance interconnected collector shoes being coupled between a pair of signal rails and provided at respectively the front end and rear end of the vehicle. A first control signal is provided in front of the vehicle to control the desired operation of the vehicle and a second control signal is provided in the rear of the vehicle to control an undesired operation of the vehicle. An impedance member is provided, in a first conductive circuit on the vehicle or in a second conductive circuit associated with the track, to prevent the second control signal in front of the train from having a threshold level high enough to confuse the desired operation of the train.
REFERENCES:
patent: Re27472 (1972-09-01), Thorne-Booth
patent: 1328865 (1920-01-01), Woodward
patent: 3532877 (1970-10-01), Thorne-Booth
patent: 3746857 (1973-07-01), Hoyler et al.
patent: 3821544 (1974-06-01), Matty
patent: 3840737 (1974-10-01), Hoyler
patent: 3891167 (1975-06-01), Perry
patent: 3958781 (1976-05-01), Woods et al.
patent: 3966149 (1976-06-01), Matty et al.
patent: 3973746 (1976-08-01), Ball
IEEE Transactions on Communication Technology, vol. COM-16, No. 3, Jun. 1968, Thorne-Booth, pp. 369-374.
Westinghouse Engineer, Hoyler, Sep. 1972, "Automatic Train Control . . . Equipment".
IEEE Vehicular Technology Group, "Atlanta Airport People Mover", Westinghouse Electric, Denver, Mar. 22, 1978.
Rhoton Richard S.
Walz Gregory J.
Brodahl R. G.
Groody James J.
Westinghouse Electric Corp.
LandOfFree
Transit vehicle signal apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transit vehicle signal apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transit vehicle signal apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-789888