Brown, Joseph Rogers
Born: Jan 10, 1810 AD
Died: 1876 AD, at 66 years of age.
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).
Page last updated: 4:10pm, 30th Aug '07