1810 – Born on January 10th in Warren, Rhode Island. American inventor, manufacturer and mechanical engineer known for his precision tools and instrumentation.
1827-1831 – He became a machinist and set up a shop to manufacture tools.
– Established his own shop and began to make small tools, especially for lathes.
1841 – He carried on business alone after the retirement of his father and created many notable machines.
1850 – He built a linear dividing machine, the first automatic machine for graduating rules in the United States.
1851-1852 – He produced the varnier caliper, reading to thousandths of an inch, and applied it to protractors.
1852 – He invented milling and grinding machines, and cutters, and he simplified the Vernier caliper.
1853 – He became partners with Lucian Sharpe (J. R. Brown & Sharpe).
1855 – Brown invented a precision gear cutter that would produce accurate gears, frill index plates and do circular graduating.
1858 – He began the manufacture of sewing machines.
1861-1867 – He began devoting his time to developing machine tools.
– Among many inventions, he designed and built a turret screw machine for muskets, a successful universal milling machine (patented), and a micrometer caliper.
1876 – Died on July 23rd in Shoals, New Hampshire.
1877 – His greatest achievement was the universal grinding machines, which allowed manufacturers to first harden articles and then to grind them with accuracy (patented posthumously).