Joe Hunt, an American inventor and machinist, developed a method to create exact copies of three-dimensional parts using a pantograph. This invention is particularly useful when copying parts that float over the spokes of wheels, where traditional methods of measurement and replication can be challenging.
A pantograph is a device made up of linked rods, with the ability to replicate the movement of a pointer on a fixed surface. This movement translates into the movement of a cutting tool or pen, creating an exact copy of the original object at a smaller or larger scale. Pantographs have been used for centuries to reproduce artwork, maps, and engineering designs.
However, Joe Hunt’s pantograph had a unique design to address the specific challenge of copying parts that float over the spokes of wheels. Traditional pantographs are limited by the distance between the two parallel rails that guide the movement of the pointer and cutting tool. This distance sets the maximum size of the object that can be copied. Objects that float over the spokes have a larger size than the distance between the rails and can’t be replicated by a traditional pantograph.
Joe Hunt’s solution was to create a pantograph with a floating head. The head is attached to the frame via two springs, allowing it to move up and down while still maintaining a stable position in reference to the rails. The cutting tool is attached to the floating head, and as the pointer moves over the original object, the head follows its movement, replicating it in the cutting process.
The floating head pantograph opened up new possibilities for working on complex mechanical parts such as gears, camshafts, and carburetors. These parts require precise measurements, and even the smallest variation can have significant consequences on the overall performance of the machine. The floating head pantograph provided a way to create exact copies, ensuring the parts worked together perfectly.
Although the floating head pantograph was initially developed for the specific challenge of copying parts that float over the spokes of wheels, it became a valuable tool for any machinist looking to create exact copies of intricate parts. Its unique design made it an essential tool in aviation, where precision is crucial for safety, as well as in the automotive and manufacturing industries.
Joe Hunt’s contribution to the world of pantographs and his innovative floating head design continue to impact the field of machining and manufacturing today. His invention has proven to be an indispensable tool for those requiring high accuracy in their work, and it remains a testament to the ingenuity and innovation of American machinists.
Posted by www.joeharmondesign.com on 2006-11-08 06:16:24