The new slant-needle machine would not only be marketed as a "Family Sewing Machine" but also as the "Slant Shank System" to educators and high schools - that also wanted the most reliable machine that can withstand daily abuse from high school students. With this plane as a base, imaginary "tripods" are erected to "fix" the plane A-D-D' and control arm-casting dimensions.
It all started back in 1935 when Singer Manufacturing Company ask Doehler-Jarvis to help pioneer the first die cast aluminum sewing machine components. They selected a point of vantage common to the parts. In 1952 production started on the Model 301 at the Anderson plant in South Carolina and were shipped to Singer stores prior to the Grand Introduction of the Singer Model 301 in October 1952.
To meet the rigid precision requirements, Doehler-Jarvis engineers devised what may have been the first ground and hardened toolsteel casting die ever used. Through the point was established a "tripod" of reference from which all critical angles and dimensions could be controlled. In 1953 the suffix "A" was added to the model number, 301A, to signify it was made in Anderson, South Carolina.
"Represents the Ultimate in Sewing Machine Design and Styling" "The Slant-Needle Sewing Machine Is All About Precision" "The World's Finest Straight Stitch Sewing Machine" "The Most Modern, Streamlined Machine Ever" "The Best Sewing Machine Ever Made" "The Last Word In Sewing Ease" "The Famous Singer 301" "Read About Me" "Legendary" "301" Slant-Needle After World War II, 1939-1945, most sewing machine manufacturers were marketing the same machines they sold prior to the war.
Singer with the Models 99-13, 128, 66-18, 15-88, 15-91, 201 and 221.
In November 1944 Singer applied for a patent that relates to sewing machines and it has a primary objective to provide an improved sewing machine which will afford better visibility at the stitching point.
The needle-bar and the presser-bar are inclined rearward between eight and sixteen degrees to a vertical plane.
Singer can tell you that it's quite a chore to build features into a machine like this ... And they're frank to give Doehler-Jarvis major credit for making their job easier with a new method for designing and producing precision parts. That means 99% of all the NA serial numbered sewing machines were not made in 1951.
We call this precise new way of making things, "Tripod-Control Dimensioning". With it they could control precision of and between two (or more) die castings of an assembly. 1952-1957 The majority of Singer 301/301A sewing machines where made between 1952-1957.
It's the only combination portable and cabinet model on the market. In over 65 years none of these Singer 301's have ever been located meaning they were most likely destroyed after testing, but one never knows.
(Conversion from one type to the other takes only seconds.) Yet the machine, including motor only weighs 16 pounds. Then the idea spread in both the Doehler-Jarvis and the Singer plants. Made in 1951 The The 301, 301A, 401A and 403A, all with NA serial numbers, were not manufactured until 1952, 1953, 19, respectively.
It had its faults, but it did give them machine-tool accuracy. In 1955 the last "NA" serial number was used and in 1956 the start of the "NB" serial numbers. There were 690,000 machines made between 1952-1957 and 10,000 Limited Edition Singer 301's made in 1951 for a total of 700,000 Singer Model 301 and 301A sewing machines.