After some species of whales were killed, their carcasses sank. Other species, like the right whale, floated. A whale that sank represented a major loss to the whaleship crews, who had risked their lives to capture the creatures.
To prevent this sort of loss and maximize a whaleship’s efficiency, Thomas Roys of the whaling port of Southampton, on Long Island, N.Y., patented an apparatus for “Raising Dead Whales From the Bottom of the Sea.” There is little evidence that many American whalers tried the device or that it found widespread use in the industry.
The first step in catching a whale was throwing at least two sharp harpoons into its back, to ensure that the whaleboat was securely fastened to its prey. Harpoon shafts were made of soft wrought iron, so that they would bend and not break off when twisted, which risked losing the wounded whale.
A line at the bottom of the harpoon’s wooden handle attached it to the whaleboat. Once in the whale’s flesh, the sharp toggle tip swiveled sideways, making it harder for the tip of the weapon to pull out. Whales normally dove deep after the first prick, to try and escape the sharp jab from the surface of the ocean. This harpoon shaft was twisted by a descending whale.