Safety coding process for track circuits

Details Safety coding process for track circuits Safety coding process for track circuits

1979-12-11

1982-09-14

Blix, Trygve M.

Railway switches and signals

Block-signal systems

Automatic

246 28F, 246 34R, 246 63R, 246182R, 455115, 324 79R, B61L 320

Patent

active

043491707

ABSTRACT:
A process for coding track circuits allows particularly information to be transmitted to a vehicle travelling over a railway track divided into a succession of sections each equipped with a track circuit, in which each of the carrier frequencies for energizing the track circuits is frequency modulated by means of a number of modulation frequencies each representing a piece of information to be transmitted. This process includes the steps of comparing the modulation frequency obtained by demodulation of the modulated carrier frequency with another source of modulation so as to check that said modulation frequency is indeed correct, and to allow transmission of the modulated carrier frequency in the corresponding track circuit only when this check is positive. This process and device applies to high-speed railway trains.

REFERENCES:
patent: 3047816 (1962-07-01), Drake et al.
patent: 3268727 (1966-08-01), Shepard
patent: 3551889 (1970-12-01), Miller
patent: 3748466 (1973-07-01), Sibley et al.
patent: 3794833 (1974-02-01), Blazek et al.
patent: 3970271 (1976-07-01), Auer et al.
patent: 4002314 (1977-01-01), Barpal
patent: 4093162 (1978-06-01), Takaoka et al.
patent: 4133504 (1979-01-01), Dobler et al.

Affiliated with

Also associated with

Rating

Safety coding process for track circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety coding process for track circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety coding process for track circuits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2152147