joseph rogers brown

الإنجليزية - الإنجليزية

تعريف joseph rogers brown في الإنجليزية الإنجليزية القاموس.

born Jan. 26, 1810, Warren, R.I., U.S. died July 23, 1876, Isles of Shoals, N.H. U.S. inventor and manufacturer. He perfected and produced a highly accurate linear dividing engine in 1850, and then developed a vernier caliper and also applied vernier methods to the protractor. With Lucian Sharpe he founded the Brown and Sharpe Manufacturing Co. His micrometre caliper appeared in 1867. He invented a precision gear cutter to produce clock gears, a universal milling machine, and (perhaps his finest innovation) a universal grinding machine, in which articles were hardened first and then ground, thereby increasing accuracy and eliminating waste

الواصلة

Jo·seph Rog·ers Brown

التركية النطق

cōsıf räcırz braun

النطق

/ˈʤōsəf ˈräʤərz ˈbroun/ /ˈʤoʊsəf ˈrɑːʤɜrz ˈbraʊn/