Length, Area & Volume Measurement

Introduction

To 1790

1790-1799

1800-1809

1810-1819

1820-1829

1830-1839

1840-1849

The British inventor, Joseph Whitworth, worked out methods for producing parts that matched each other to the nearest thousandths of an inch.   However, there still remained the problem that different manufacturers might produce items such as screw threads with different pitches, so that bolts made my one company might not fit in nuts made by another company.   In 1841, he proposed a standard pitch for all screws made by any company, a suggestion that was adopted eventually.   This was the beginning of standardization that was essential for products to work together when assembled from parts made by any company. ^{Asimov 344}

1850-1859

1860-1869

1870-1879

1880-1889

1890-1899

1900-1909

1910-1919

1920-1929

1930-1939

1940-1949

1950-1959

1960-1969

1970-1979

1980-1989

1990-1999