Many companies faced lawsuits and fines for using copyrighted and/or trademarked names. This continued long after the companies stopped making class 15 machines and started producing their own machines. In order to gain customers, the Japanese manufacturers would often badge their machines with names that the US consumer was already familiar with. The whole reason I bought the one that says Singer is for the copyright infringement. Singer may have offered it up since they never really focused on that line of machines or the patents may have been up so the plans were free game. How the US was able to give the plans away for this sewing machine is fairly murky. Like I said earlier we have three of them, one has no manufacture marks, one is stamped with Brother on many of the parts, and the one that actually says Singer on it is stamped in many places Juki. Many different companies made these machines to get started and many are still in business today. This was done as an effort to help rebuild Japans economy. So how and why did they get copied? At the end of World War II the US government basically gave the Japanese the blueprints to the Singer 15 sewing machine. Now there are machines that take other needles or other bobbins but the vast majority of machines on the market today use the bobbin and the needle that Singer devolped for the 15K in 1879. The class 15 bobbin hasn't changed much since 1879 and the needles you buy at any of the big box stores are 15x1 needles. The Singer 15 brought us our standard needles today and the standard bobbin of today. Singer Sewing Machine Company started making class 15 machines in 1879 and stopped making them in the mid-1950s. So now that we know what a class 15 machine is, let's jump into the history of them. Now many sewist and quilters prefer the 15 machines because of this, there is nothing obstructing the view of the needle. That's it, it's as simple as where the tension is located. On a class 15 sewing machine, the tension is off the left side of the machine head and not on the front of the machine. Let's start by what makes a class 15 sewing machine. Purchasing items from the links cost you nothing more and adds a few pennies to the fabric budget.
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