Some articles on wire, messenger wire:
... high-speed current collection, it is necessary to keep the contact wire geometry within defined limits ... This is usually achieved by supporting the contact wire from above by a second wire known as the messenger wire (US Canada) or catenary (UK) ... This wire approximates the natural path of a wire strung between two points, a catenary curve, thus the use of catenary to describe this wire or sometimes the whole system ...
Famous quotes containing the words wire and/or messenger:
“God, I am caught in a snare!
I know not what fine wire is round my throat;
I only know I let him finger there
My pulse of life, and let him nose like a stoat
Who sniffs with joy before he drinks the blood.”
—D.H. (David Herbert)
“Still let my tyrants know, I am not doomed to wear
Year after year in gloom, and desolate despair;
A messenger of Hope comes every night to me,
And offers for short life, eternal liberty.”
—Emily Brontë (18181848)