Catenary

Definitions

1. The curve described by a flexible chain or a rope if it is supported at each end and is acted upon by no other forces than a uniform gravitational force due to its own weight and variations involving additional and non-uniform forces. It is described by the hyperbolic cosine function.
2. Any physical cable, rope, chain, or other weight-supporting structure taking such geometric shape, as a suspension cable for a bridge or a power-transmission line or an arch for a bridge or roof.
3. The curve of an anchor cable from the seabed to the vessel; it should be horizontal at the anchor so as to bury the flukes.
4. A cable, the segments of which between supports take a catenary geometric shape, supporting in turn an overhead conductor that provides trains, trams or trolley buses with electricity, or (metonymic) the combination of the conductor, the cable, and supports.

Equivalents

Examples

“The result⟳ was catenary being torn down several hundred feet at a time.”

“The colour-lights showed up much better than the semaphores which, in spite of their approach⟳ warning boards, are not readily visible at any distance between the supports for the catenaries.”

“The electric overhead was catenary, using 0000 contact⟳ wire, and the new railway employed the latest in electric block⟳ signal systems.”

“In addition the catenary itself is divided into 1-2 km sections (corresponding to mechanical sections or tension lengths) with motorized remotely controlled sectioning off-load isolators such that only one train⟳ is likely to be immobilized at any one time as a result⟳ of an incident associated with the catenary system.”

“Overhead construction was catenary rather than a single wire to allow⟳ the use⟳ of pantographs instead of trolley poles so that speeds could be higher.”

CEFR level