Births on April 4

Linus Yale, Jr.

Born on April 4, 1821

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.

References

Linus Yale, Jr.

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Events on 1821

22 Feb

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

Greek War of Independence
Establishment of the Peloponnesian Senate by the Greek rebels.
9 Jul

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
23 Jul

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

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

Births on April 4

Linus Yale, Jr.

Born on April 4, 1821

References

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Events on 1821

Danubian Principalities

Greek War of Independence

Greek War of Independence

Monemvasia

Gran Colombia