A harpoon is a long spear-like projectile used in fishing, whaling, sealing, and other hunting activities to shoot, kill, and capture large fish or marine mammals such as seals, sea cows and whales. It accomplishes its task by impaling the target animal and securing it with barb or toggling claws, allowing the fishermen or hunters to use an attached rope or chain to pull and retrieve the animal. A harpoon can also be used as a ranged weapon against other watercraft in naval warfare.
Certain harpoons are made with different builds to perform better with the type of target being aimed at. For example, the Inuit have short, fixed-foreshaft harpoons for hunting at breathing holes, while loose-shafted ones are made for throwing and remaining attached to the game.[1]
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In the 1990s, harpoon points, known as the Semliki harpoons or the Katanda harpoons, were found in the Katanda region in Zaire (called the Democratic Republic of the Congo today). As the earliest known harpoons, these weapons were made and used 90,000 years ago, most likely to spear catfishes.[2] Later, in Japan, spearfishing with poles (harpoons) was widespread in palaeolithic times, especially during the Solutrean and Magdalenian periods. Cosquer Cave in Southern France contains cave art over 16,000 years old, including drawings of seals which appear to have been harpooned.[3]
The two flue harpoon was the primary weapon used in whaling around the world, but it tended to penetrate no deeper than the soft outer layer of blubber. Thus it was often possible for the whale to escape by struggling or swimming away forcefully enough to pull the shallowly embedded barbs out backwards. This flaw was corrected in the early nineteenth century with the creation of the one flue harpoon; by removing one of the flues, the head of the harpoon was narrowed, making it easier for it to penetrate deep enough to hold fast. In the Arctic, the indigenous people used the more advanced toggling harpoon design. In the mid-19th century, the toggling harpoon was adapted by Lewis Temple, using iron.
In most land animals there are certain valves or flood gates in many of their veins, whereby when wounded, the blood is in some degree at least instantly shut off in certain directions. Not so with the whale; one of whose peculiarities is, to have an entire non-valvular structure of the blood-vessels, so that when pierced even by so small a point as a harpoon, a deadly drain is at once begun upon his whole arterial system; and when this is heightened by the extraordinary pressure of water at a great distance below the surface, his life may be said to pour from him in incessant streams. Yet so vast is the quantity of blood in him, and so distant and numerous its interior fountains, that he will keep thus bleeding and bleeding for a considerable period; even as in a drought a river will flow, whose source is in the well springs of far off and undiscernible hills.
All whale-boats carry certain curious contrivances, originally invented by the Nantucket Indians, called druggs [i.e. drogues]. Two thick squares of wood of equal size are stoutly clenched together, so that they cross each other's grain at right angles; a line of considerable length is then attached to the middle of this block, and the other end of the line being looped, it can in a moment be fastened to a harpoon. It is chiefly among gallied [frightened] whales that this drugg is used. For then, more whales are close round you than you can possibly chase at one time. But sperm whales are not every day encountered; while you may, then, you must kill all you can. And if you cannot kill them all at once, you must wing [injure] them, so that they can be afterwards killed at your leisure. Hence it is that at times like these the drugg comes into requisition.
The first use of explosives in the hunting of whales was made by the British South Sea Company in 1737, after some years of declining catches. A large fleet was sent, armed with cannon-fired harpoons. Although the weaponry was successful in killing the whales, most of the catch sank before being retrieved. However, the system was still occasionally used, and underwent successive improvements at the hands of various inventors over the next century, including Abraham Stagholt in the 1770s and George Manby in the early 19th century.[10]
William Congreve, who invented some of the first rockets for British Army use, designed a rocket-propelled whaling harpoon in the 1820s. The shell was designed to explode on contact and impale the whale with the harpoon. The weapon was in turn attached by a line to the boat, and the hope was that the explosion would generate enough gas within the whale to keep it afloat for retrieval. Expeditions were sent out to try this new technology; many whales were killed, but most of them sank.[11] These early devices, called bomb lances, became widely used for the hunting of humpbacks and right whales.[10] A notable user of these early explosive harpoons was the American Thomas Welcome Roys in 1865, who set up a shore station in Seydisfjrdur, Iceland. A slump in oil prices after the American Civil War forced their endeavor into bankruptcy in 1867.[12]
An early version of the explosive harpoon was designed by Jacob Nicolai Walse, a Norwegian painter and inventor. His 1851 application was rejected by the interior ministry on the grounds that he had received public funding for his experiments. In 1867, a Danish fireworks manufacturer, Gaetano Amici, patented a cannon-fired harpoon, and in the same year, an Englishman, George Welch, patented a grenade harpoon very similar to the version which transformed whaling in the following decade.
In 1870, the Norwegian shipping magnate Svend Foyn patented and pioneered the modern exploding whaling harpoon and gun. Foyn had studied the American method in Iceland.[13] His basic design is still in use today. He perceived the failings of other methods and solved these problems in his own system. He included, with the help of H.M.T. Esmark, a grenade tip that exploded inside the whale. This harpoon design also utilized a shaft that was connected to the head with a moveable joint. His original cannons were muzzle-loaded with special padding and also used a unique form of gunpowder. The cannons were later replaced with safer breech-loading types.[12][13]
Together with the steam-powered whale catcher, this development ushered in the modern age of commercial whaling. Euro-American whalers were now equipped to hunt faster and more powerful species, such as the rorquals. Because rorquals sank when they died, later versions of the exploding harpoon injected air into the carcass to keep it afloat.[citation needed]
The modern whaling harpoon consists of a deck-mounted launcher (mostly a cannon) and a projectile which is a large harpoon with an explosive (penthrite) charge, attached to a thick rope. The spearhead is shaped in a manner which allows it to penetrate the thick layers of whale blubber and stick in the flesh. It has sharp spikes to prevent the harpoon from sliding out. Thus, by pulling the rope with a motor, the whalers can drag the whale back to their ship.[citation needed]
A recent development in harpoon technology is the hand-held speargun. Divers use the speargun for spearing fish. They may also be used for defense against dangerous marine animals. Spearguns may be powered by pressurized gas or with mechanical means like springs or elastic bands.[citation needed]
I hate this thing because it randomly (every 30 seconds or so) lags at tracking my movements, and every few minutes it STOPS tracking completely; I move the mouse, but the pointer remains completely stuck in place. When this happens, I can still click the buttons - for example, right-clicking brings up the menu, etc - but the pointer will NOT move until I lift the mouse then put it back down. Until I pick it up, it will remain stuck regardless of the wild movements I make.
I have tried this on 3 Harpoon Wireless mice, with old firmwares, with latest firmwares, with wire, with dongle, with polling rate at 1000, 500, 125, etc. I have changed the DPI settings, I've changed the lighting settings, I've turned off the lighting settings, I've turned off the sleep settings.
I'm quite disappointed in the whole situation, and I only hope that a firmware is released soon which addresses these tracking issues which I'm SURE some people have experienced, even if they're remaining quiet.
When new window opens, scroll down the list a bit until you hit USB SETTINGS. Click little square with plus in it, and then click another little square with plus next to USB SELECTIVE SUSPEND SETTING. Check the state of it, and make sure it's set to DISABLED. Then restart the PC.
And I was as surprised as you are; when I got the second mouse (swapped at the store) I thought I was super unlucky. When I swapped for another one at the store and got the same results, I had to conclude it was a hardware/firmware issue. (I've almost never used the mouse in wireless mode, so it has nothing to do with wireless interference).
I used my phone camera to look at the sensor below the mouse when it was directly plugged in to the USB port, and it would have a full, bright light for a few seconds after lifting it up, then it would sort of flicker and fade out until I ran my finger over it. Had the same behavior on all ports across different systems.
But when I plugged the Harpoon in to a USB hub (powered by the same USB port, NOT externally powered) the sensor light remained full and bright the whole time. I then proceeded to play some games and then do some web browsing and did NOT experience the same issues as before. 152ee80cbc
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