Find number abc
If 73c00 - baa67 = 6b633 find number abc. Multiple solutions may exist.Correct answers: 0
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Elijah McCoyBorn 27 Mar 1843; died 10 Oct 1929 at age 86.Black-American inventor holding many patents for the automatic lubrication of machinery. Born in Canada. While resident in Ypsilanti, Michigan, after two years of development, he received his first U.S. patent, No. 129,843 on 23 Jun 1872, for a lubricator for steam engines. By 1926 he held several dozen patents for devices that enabled a steady supply of oil to machinery, in drops flowing from a reservoir cup while the machine continued to run, thus eliminating the need to stop the machine to oil it. These were used by stationary steam engines in factories, railway locomotives, steam-powered inland waterway and ocean ships. His inventiveness yielded other patents, including an ironing table, scaffold support and rubber heel.« |