George B. Grant

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George Barnard Grant (December 21, 1849 – August 16, 1917) was an American mechanical engineer, inventor, entrepreneur and

botanist.[1] He is notable for having made important contributions to 19th-century mechanical calculators, for pioneering new techniques in gear making, and for starting several successful companies. Grant came to be known as "the Father of the American Gear Cutting Industry". Several of his businesses continued to operate many years after his death.[2]

Personal life

Grant was born in Gardiner, Maine, to Peter Grant, a farmer, and Vesta (Capen) Grant.

Lawrence Scientific School
at Harvard University, graduating with a B.S. degree in 1873.

After graduation from Harvard, Grant lived in Boston and Maplewood, Massachusetts. He moved to Lexington, Massachusetts, in 1887, and then Pasadena, California, around 1900. He died in Pasadena in 1917, having never married.[4]

Grant 1876 Calculating Machine
Grant's Barrel, 1877

Calculating machine work

While a student at Harvard, Grant worked on the problem of inventing a mechanical calculator. With the encouragement of his professor,

Babbage and Per Georg Scheutz.[5] He published this work in the American Journal of Science and Arts (see below) and was awarded two patents as a student. Shortly after college, Grant designed and built two calculating machines that were displayed at the Centennial Exposition held in Philadelphia in 1876[6] One of them, known as a difference engine, was eight feet long and five feet high, and weighed 2,000 pounds. It may have been the largest calculator ever built (pictured below).[7] The other, known as the "Centennial Model", is among the Smithsonian collection of Grant's inventions.[8] The Smithsonian Institution has nine of Grant's inventions in its collection in Washington, D.C.[9] Grant's calculating machine business was known as "Grant Calculating Machine Company of Lexington, Mass". Although Grant's sales of calculating machines were modest (125 of the "Rack and Pinion Model" were sold commercially), his machines were considered sturdy and reliable[10]
Grant's calculators won a number of awards: the Centennial Medal, the Scott Medal of The Franklin Institute, and the Gold Medal of the Massachusetts Mechanics Association.[11]

Gear industry work

As an outgrowth of Grant's work on calculating machines, he became interested in the production of gears. This field was undergoing much growth and change in the late 19th century. Grant played a leading role in that development. For example, a controversy had raged for many years over gears' optimal design. In Grant's time, the most common were

cycloidal gears. Grant argued that in fact involute gears were superior for most applications. Grant played an important role in shifting industry convention, and since then most gears produced have been involute.[12] As with calculating machines, Grant published his work in journals, and was awarded patents for his inventions of new gear manufacturing devices (see below). Grant also published books that became standard reference works in the gear industry (see below). Companies that Grant started included Grant Gear Works (1877), Boston Gear Works,[13] Lexington Gear Works, Cleveland Gear Works, and Philadelphia Gear Works (1892). The Philadelphia Gear website has a corporate history that explains Grant's significance to the company.[14]

Contributions to botany

In California, starting in about 1900, Grant became a collector of previously undocumented plant species. He named a number of plants, and his collection is now part of the Stanford University herbarium.[15][16]

Publications

  • Grant, George B. (June 5, 1871). "On a New Difference Engine". American Journal of Science and Arts. 2 (8): 113–117.
    S2CID 131553703
    .
  • Grant, George B. (July 15, 1874). "A New Calculating Machine". American Journal of Science and Arts. 8 (46): 277–284.
    S2CID 131309896
    .
  • Grant, George B. (1885). A Handbook on the Teeth of Gears. Lexington Gear Works.
  • Grant, George B. (1891). Odontics: Or, The Theory and Practice of the Teeth of Gears. Lexington, MA: Lexington Gear Works.
  • Grant, George B. (1899). A Treatise on Gear Wheels. Philadelphia Gear Works.

Patents

  • U.S. patent 129,335, "Improvement in Calculating-Machines", 1872[17]
  • U.S. patent 138,245, "Improvement in Calculating-Machines", 1873[18]
  • U.S. patent 368,528 "Calculating-Machine" from 1887[19]
  • U.S. patent 405,030 "Machine for Cutting Spur and Worm Gears", 1889[20]
  • U.S. patent 407,437 "Machine for Planing Gear Teeth", 1889[21]
  • U.S. patent 512,189 "Machine for Generating Beveled Gear-Teeth", 1894[22]
  • U.S. patent 605,288 "Calculating-Machine", 1898[23]

Further reading

References

  1. ^ L. Leland Locke, "George Barnard Grant", Dictionary of American Biography, vol. 7, New York: Scribners, 1931, pp. 487–488y
  2. ^ Rugged Gear Man Grant, American Machinist, August 28, 1947
  3. ^ "Our Family Genealogy Pages – George Barnard Grant". OurFamilyTree.com. Retrieved November 18, 2017.
  4. ^ Grant, George (1928–1936). Dictionary of American Biography. American Council of Learned Societies.
  5. S2CID 131553703
    .
  6. ^ Sandhurst, Phillip K. (1876). The Centennial Exhibition Critically Described And Illustrated. P.W. Ziegler & Co.
  7. ^ Grant, George (January 23, 2003). "Grant Calculating Machine". IBM Archives. IBM. Retrieved November 18, 2017.
  8. ^ Grant, George. "Grant Calculating Machine, Centennial Model". National Museum of American History. Smithsonian. Retrieved November 18, 2017.
  9. ^ "Collections Search Result: George B. Grant". Smithsonian Institution. Retrieved November 15, 2017.
  10. ^ Locke, L. Leland (1931). George Barnard Grant, Dictionary of American Biography. American Council of Learned Societies.
  11. doi:10.1038/scientificamerican08041894-71
    .
  12. ISBN 9780262730334
    .
  13. ^ "Company Website". Boston Gear Works. Retrieved November 22, 2017.
  14. ^ Power Transmission and Gearing Solutions - Philadelphia Gear
  15. ^ [herbarium "Grant, George Bernard"]. Islapedia. Retrieved November 22, 2017. {{cite web}}: Check |url= value (help)
  16. ^ "G.B. Grant". International Plant Name Index. Retrieved November 22, 2017.
  17. ^ Grant, George. "Improvement in Calculating-Machines". U.S. Patent and Trademark Database. U.S.Patent and Trademark Office. Retrieved November 21, 2017.
  18. ^ Grant, George. "US Patent 138,245". U.S. Patent and Trademark Database. U.S. Patent and Trademark Office. Retrieved November 18, 2017.
  19. ^ Grant, George. "Calculating-Machine". U.S. Patent and Trademark Database. U.S. Patent and Trademark Office. Retrieved November 18, 2017.
  20. ^ Grant, George. "Machine for Cutting Spur and Worm Gears". U.S. Patent and Trademark Database. U.S. Patent and Trademark Office. Retrieved November 18, 2017.
  21. ^ Grant, George. "Patent for Machine for Planing Gear Teeth". U.S. Patent and Trademark Database. U.S. Patent and Trademark Office. Retrieved November 18, 2017.
  22. ^ Grant, George. "Machine for Generating Beveled Gear Teeth". U.S. Patent and Trademark Database. U.S. Patent and Trademark Office. Retrieved November 18, 2017.
  23. ^ Grant, George. "Calculating-Machine". U.S. Patent and Trademark Database. U.S. Patent and Trademark Office. Retrieved November 18, 2017.
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