In fulfilling a contract for 25,000 U.S. Army rifles (Model 1841) and a like quantity for the British government, Robbins and Lawrence were the first to achieve interchangeability of parts on a fully practical level, contributing greatly to all subsequent mass production of machine products. This was made possible by the systematic improvement and refinement of existing standard and special-purpose machine tools, enabling them to perform with the close-limit precision essential for "repeatability" and thus interchangeability (see the American Precision Museum).
05089
YearAdded:
Image Credit:
Courtesy Flickr/Liz West (CC BY 2.0)
Image Caption:
American Precision Museum
Era_date_from:
1966
1987
Ithamar A. Beard, an engineer of some prominence in New England, surveyed the mill brook and selected the best site for a storage dam. Contractor Simeon Cobb, knowledgeable of contemporary civil engineering practices, made major changes to the dam's original design, converting the linear dam into a gentle arch.
YearAdded:
Image Credit:
Courtesy Wikipedia/Ymblanter (CC BY-SA 3.0)
Image Caption:
The Ascutney Mill Arch-Gravity Dam
Era_date_from:
1834
1970
Ithamar A. Beard, an engineer of some prominence in New England, surveyed the mill brook and selected the best site for a storage dam. Contractor Simeon Cobb, knowledgeable of contemporary civil engineering practices, made major changes to the dam's original design, converting the linear dam…
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In fulfilling a contract for 25,000 U.S. Army rifles (Model 1841) and a like quantity for the British government, Robbins and Lawrence were the first to achieve interchangeability of parts on a fully practical level, contributing greatly to all subsequent mass production of machine products. This… Read More
