Cock

—In mechanics, a device for regulating the flow of fluids through a pipe; usually consisting of a tapered conical plug having a hole or port in it, and working in a shell of iron or bra bored out to receive the plug, and provided with pa ages to connect with pipes, etc., at either end. Rotation of the plug controls the pa age of the fluids by bringing the openings in the plug opposite those in the shell, or away from them. The particular use or construction of any cock is generaliy shown by its name, as blowdown cock, angle cock, ete.