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Illustration of track circuit invented by William Robinson in 1872 Track circuit transformer on the right, new axle counter on the left (Slovenia). A track circuit is an electrical device used to prove the absence of a train on a block of rail tracks to control railway signals. An alternative to track circuits are axle counters.
Smaller cables may be laid unsecured in horizontal trays, or secured with cable ties to the bottom of vertically mounted trays. [4] To maintain support of cables at changes of elevation or direction of a tray, a large number of specialized cable tray fittings are made compatible with each style and manufacturer.
Cable carriers, also known as drag chains, energy chains, or cable chains depending on the manufacturer, are guides designed to surround and guide flexible electrical cables and hydraulic or pneumatic hoses connected to moving automated machinery. They reduce wear and stress on cables and hoses, prevent entanglement, and improve operator safety ...
The various serial digital interface standards all use (one or more) coaxial cables with BNC connectors, with a nominal impedance of 75 ohms. This is the same type of cable used in analog composite video setups, which potentially makes for easier "drop in" equipment upgrades (though may be necessary for long runs at the higher bitrates for older oxidising or lower grade of cable to replaced ...
A cable railway is a railway that uses a cable, rope or chain to haul trains. It is a specific type of cable transportation . The most common use for a cable railway is to move vehicles on a steeply graded line that is too steep for conventional locomotives to operate on – this form of cable railway is often called an incline or inclined ...
Y tie track next to conventional track. An unusual form of tie is the Y-shaped tie, first developed in 1983. Compared to conventional ties, the volume of ballast required is reduced due to the load-spreading characteristics of the Y-tie. [27] Noise levels are high but the resistance to track movement is very good. [28]
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