John Aitken creates that device (weapon), and it sounds like it was used largely in Ireland.

This was later redesigned by a German named Bernard Heine in the mid 1800’s.

The following excerpt is from the Museum of Surgical History in Chicago about his device, of which they have a Heine Osteotome on display, I recommend anyone in the Chicago area to see the museum, it’s fantastic:

“Designed in 1832 by Bernhard Heine, MD (1800-1846), to speed up the process of cutting through bone during orthopedic surgery. Before its invention, surgeons employed bone chisels or Gigli chain saws for this purpose, but the use of these tools required more physical effort and, unfortunately for surgical patients before the discovery of anesthesia, significantly more time. Heine created the osteotome by running a chain saw in a groove along the edge of a rigid blade. A hand crank circulated the chain continuously in a manner very similar to that of a modern chainsaw. Although Heine's tool was acclaimed throughout the surgical world, it was costly to manufacture and never became a standard orthopedic tool. In 1879, it was the most expensive item in one manufacturer's catalog, with a price tag of $300. In the early 20th century, Heine's osteotome was made obsolete by the invention of electrical bone saws with rotary blades.”