Railway switches and signals – Block-signal systems – Automatic
Patent
1981-08-21
1983-10-04
Groody, James J.
Railway switches and signals
Block-signal systems
Automatic
246 28K, 246122R, B61C 2106
Patent
active
044074700
ABSTRACT:
Coded energy applied to the track circuit rails for cab signal control when a train occupies the section is also applied over a line circuit to the local input of the solid state track relay unit and to a code reset module in which it drives a code following relay and charges a timing capacitor during a predetermined number of code pulses. When the section becomes unoccupied, the track relay unit produces a coded output, from the combined rail and local inputs, to which the track registry relay is non-responsive. An analog storage circuit in the reset module receives and stores this coded output energy during each timing period. During each code off-time, the timing capacitor is connected to a switching relay circuit controlled by a DIAC unit. At the completion of the timing period, sufficient charge exists on the timing capacitor to activate the DIAC unit during the next code offtime and energize the switching relay which completes a circuit for discharging the analog voltage storage through the track relay to supplement the coded energy from the track relay unit. The track registry relay then receives sufficient energy to pick up and reset the track circuit to its normal steady energy condition.
REFERENCES:
patent: 1653358 (1927-12-01), Gilson
patent: 1810940 (1931-06-01), Baughman
patent: 1822088 (1931-09-01), Hailes
patent: 3217158 (1965-11-01), Ehrlich
patent: 3263074 (1966-07-01), Ihrig
patent: 4171788 (1979-10-01), Nagel
patent: 4188002 (1980-02-01), Gilcher
American Standard Inc.
Groody James J.
Williamson, Jr. A. G.
LandOfFree
Code reset apparatus for railroad 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 Code reset apparatus for railroad track circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Code reset apparatus for railroad track circuits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-970310