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Births on April 4

Linus Yale, Jr.
1821Apr, 4

Linus Yale, Jr.

Linus Yale, Jr., American engineer and businessman (d. 1868)
Linus Yale Jr. (April 4, 1821 – December 25, 1868) was an American mechanical engineer, manufacturer, and co-founder of the Yale Lock Manufacturing Company. He is best known for his inventions of locks, especially the cylinder lock. His basic lock design is still widely distributed today, and constitutes a majority of personal locks and safes.

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Events on 1821

  • 22Feb

    Danubian Principalities

    Greek War of Independence: Alexander Ypsilantis crosses the Prut river at Sculeni into the Danubian Principalities.
  • 26May

    Greek War of Independence

    Establishment of the Peloponnesian Senate by the Greek rebels.
  • 9Jul

    Greek War of Independence

    Four hundred and seventy prominent Cypriots including Archbishop Kyprianos are executed in response to Cypriot aid to the Greek War of Independence
  • 23Jul

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    While the Mora Rebellion continues, Greeks capture Monemvasia Castle. Turkish troops and citizens are transferred to Minor Asia coasts.
  • 28Nov

    Gran Colombia

    Panama Independence Day: Panama separates from Spain and joins Gran Colombia.