Word: stressless
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Dates: during 1943-1943
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Died. Carl Edwards Johansson, 79, Swedish-born father of hair-splitting precision gauges; in Eskilstuna, Sweden. Be ore he was 32, the shaggy-browed toolmaker hand-forged and hand-polished blocks of steel so internally stressless, externally flawless that they could detect a machinist's error to within 2,000,000ths of an inch (a 2,000,000th is to an inch as an inch is to 31.6 miles). Nicknamed "Jo" blocks, they made possible mass production's interchangeability of parts...