This was lifted by cams striking the helve between the pivot and the head.
From the en.wikipedia.org
A helve hammer has the head mounted at the end of a recumbent helve.
From the en.wikipedia.org
The nose helve hammer seems to have been unusual until the late 18th or early 19th century.
From the en.wikipedia.org
They fall into two types, helve hammers and drop hammers.
From the en.wikipedia.org
The axe has many forms and specialized uses but generally consists of an axe head with a handle, or helve.
From the en.wikipedia.org
The belly helve hammer was the kind normally found in a finery forge, used for making pig iron into forgeable bar iron.
From the en.wikipedia.org
This was probably the case because the strain on a wooden helve would have been too great if the head were heavier.
From the en.wikipedia.org
The choice of which of the kinds, listed below, should be used in a particular context may depend on the strain that its operation imposed on the helve.
From the en.wikipedia.org
The tilt hammer or tail helve hammer has a pivot at the centre of the helve on which it is mounted, and is lifted by pushing the opposite end to the head downwards.
From the en.wikipedia.org
More examples
Haft: the handle of a weapon or tool
(Helved) A term to express the handle of an axe, adze, hammer, etc., when of a different tincture. See Haft.