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arch head

noun

, Machinery.
  1. a vertical, arc-shaped member fixed to the end of a walking beam, for supporting a chain from which a pump rod or the like is suspended in such a way as to let it rise and fall vertically.


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Example Sentences

It is divided into four lights, and the arch-head is filled with good simple tracery.

A chain from the piston-rod to the arch head, as described in the single-acting engine, would fail to transmit this force.

But the arch head has a natural organism, which separates its ornament into distinct families, broadly definable.

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