In 1910 the Simplex Manufacturing Co. of New York City was manufacturing a patented "combination bench filer and metal hack saw". By 1912 the business had failed and the assets were sold to the newly created Extensive Manufacturing Co., which continued making the machine.
Information Sources
- Ad in 1901-01-06 American Machinist.
- The October 1912 Steam.
The plant of the Simplex Manufacturing Co., Thompsonville, Conn., has been disposed of at trustrees' sale to the Extensive Manufacturing Co., New York City.