Railway switches and signals – Train dispatching – Central signal control
Patent
1976-10-07
1978-01-03
Blix, Trygve M.
Railway switches and signals
Train dispatching
Central signal control
104 88, 246134, B61L 2700
Patent
active
040662284
ABSTRACT:
A route oriented interlocking control system with only entrance, exit, and alternate route selectors on the control machine console. No track switch controllers or indications are provided at the control location. Operation of entrance and exit selectors in sequence establishes desired route storage within the control machine, after the absence of any conflicting route and the non-occupancy of involved track sections are checked. This route control is then transmitted to the field location to select the field route relay, position the track switches, and clear the proper wayside movement indicator to authorize train movement through the route when all switches are positioned and the track within the interlocking is unoccupied. Indications of the registry of the route control and operation of the movement indicator are returned to the office display console. Route release occurs by secondary circuit controllers when the train occupies the final track section. This sectional release allows the selection and storage of route information for any route not conflicting with the initial portion of the released route when cleared by the train. Selection of an alternate or run-around route is made by operation of single device designating that alternate route prior to the operation of the entrance and exit devices for the basic route. Improper operation of the control machine results in the cancellation by primary and secondary circuit controllers of all route information storage and no route is aligned.
REFERENCES:
patent: 3219815 (1965-11-01), Livingston
patent: 3937428 (1976-02-01), Elder
Blix Trygve M.
Eisenzopf Reinhard J.
McIntire, Jr. R. W.
Westinghouse Air Brake Company
Williamson, Jr. A. G.
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