A track circuit is a simple electrical device used to detect the absence of a train on rail tracks, used to inform signallers and control relevant signals.
Read more about Track Circuit: Principles and Operation, Transmission of Status, Siding Turnout, Track Circuit Clips, History
Famous quotes containing the words track and/or circuit:
“What joy when the insouciant
armadillo glances at us and doesn’t
quicken his trotting
across the track into the palm brush.
What is this joy? That no animal
falters, but knows what it must do?”
—Denise Levertov (b. 1923)
“Within the circuit of this plodding life
There enter moments of an azure hue,
Untarnished fair as is the violet
Or anemone, when the spring strews them
By some meandering rivulet, which make
The best philosophy untrue that aims
But to console man for his grievances.
I have remembered when the winter came,”
—Henry David Thoreau (1817–1862)