What is (a) The lever at the end of which is the hammer head, in a forge hammer. (b) A forge hammer which is lifted by a cam acting on the helve between the fulcrum and the head called?

helve — (Iron Working) (a) The lever at the end of which is the hammer head, in a forge hammer. (b) A forge hammer which is lifted by a cam acting on the helve between the fulcrum and the head. (Webster's 1913.)

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