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The three-point hitch (British English: three-point linkage) is a widely used type of hitch for attaching ploughs and other implements to an agricultural or industrial tractor. [ 1 ] [ 2 ] The three points resemble either a triangle, or the letter A.
Sprayers range in size from man-portable units (typically backpacks with spray guns) to trailed sprayers that are connected to a tractor, to self-propelled units similar to tractors with boom mounts of 4–30 feet (1.2–9.1 m) up to 60–151 feet (18–46 m) in length depending on engineering design for tractor and land size.
The first three-point hitches were experimented with in 1917. After Harry Ferguson applied for a British patent for his three-point hitch in 1926, they became popular. A three-point attachment of the implement to the tractor is the simplest and the only statically determinate way of joining two bodies in engineering.
The Ferguson photo is really a bad picture to illustrate a three point hitch. First of all, the top link of the hitch is missing. Secondly the bottom links are holding a 'drawbar', and by its different color, it's the drawbar that's emphasized, not the three point hitch. I've swapped photo positions because the Ferguson photo is so bad.
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The Ford N-series tractors were a line of farm tractors produced by the Ford Motor Company between 1939 and 1952, spanning the 9N, 2N, and 8N models. [1]The 9N was the first American-made production-model tractor to incorporate Harry Ferguson's three-point hitch system, a design still used on most modern tractors today.