1795 - Allen was in Providence, Rhode Island on September 15, 1795.
1813 - Attended and graduated from Brown University.
1815 - Studied law at Brown University and was admitted to the bar.
1821 - Constructed the first hot-air furnace for the heating of dwelling houses.
1833 - Invented the automatic cut-off valve for steam engines and have it patented.
1882 - Died on March 17, 1882.
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- "The people are not to be disarmed of their weapons. They are left in full possession of them."