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2. Mitutoyo - Wikipedia

   en.wikipedia.org/wiki/Mitutoyo

   Mitutoyo America Corporation was formed in 1963 and is headquartered in Aurora, Illinois (just outside Chicago).Mitutoyo America offers the full product line of precision measuring tools, instruments and equipment with a distribution network, training and education classes, software development, and service support to provide a comprehensive metrology organization.

3. Vernier scale - Wikipedia

   en.wikipedia.org/wiki/Vernier_scale

   The first caliper with a secondary scale, which contributed extra precision, was invented in 1631 by French mathematician Pierre Vernier (1580–1637). [1] Its use was described in detail in English in Navigatio Britannica (1750) by mathematician and historian John Barrow. [2]

4. Calipers - Wikipedia

   en.wikipedia.org/wiki/Calipers

   Vernier calipers commonly used in industry provide a precision to 0.01 mm (10 micrometres), or one thousandth of an inch. They are available in sizes that can measure up to 1828 mm (72 in). They are available in sizes that can measure up to 1828 mm (72 in).

5. Level (optical instrument) - Wikipedia

   en.wikipedia.org/wiki/Level_(optical_instrument)

   The Y level or wye level is the oldest and bulkiest of the older style optical instruments. A low-powered telescope is placed in a pair of clamp mounts, and the instrument then leveled using a spirit level, which is mounted parallel to the main telescope. The term dumpy level (also builder's level) endures despite the evolution in design. They ...

6. Spirit level - Wikipedia

   en.wikipedia.org/wiki/Spirit_level

   The Fell All-Way precision level, one of the first successful American made bull's eye levels for machine tool use, was invented by William B. Fell of Rockford, Illinois in 1939. [2] The device was unique in that it could be placed on a machine bed and show tilt on the x-y axes simultaneously, eliminating the need to rotate the level 90 degrees.

7. Coordinate-measuring machine - Wikipedia

   en.wikipedia.org/wiki/Coordinate-measuring_machine

   The first CMM was developed by the Ferranti Company of Scotland in the 1950s [1] as the result of a direct need to measure precision components in their military products, although this machine only had 2 axes. The first 3-axis models began appearing in the 1960s (made by DEA of Italy and LK of the UK), and computer control debuted in the early ...