In simple terms, they are pieces of extremely fine wire formed into a series of tightly spaced U shapes.
This wire formed the vital portion of a dictograph connection.
On one side you see mostly lights; on the other, green wires form a climbing vine.
The two wires form a 'T' shape, hence the name.
These wires form a circuit like the one you might find in a flashlight.
Against a night sky, the live wires form an incandescent web - and a lovers' trap.
The wire forms the anode and the crystal forms the cathode.
The wire forms a small loop with a diameter of about 5 mm.
The struts and wire bracing of a typical biplane form a box girder.
It is called this because the two wires form a balanced loop through which both sides of the telephone call travel.
