Today in History: August 21
Today is not the 175th birthday of the Venetian blind, but it is the 175th anniversary of John Hampson’s patent, “Manner of retaining in any desired position the slats of Venetian blinds” (Patent 2223). The inventor, who was based in New Orleans, developed a tool for holding the slats in place—which we still see in use in today’s blinds in the use of a rod to twist the slats to any desired angle.
* * * *
And more in Inventions Today: William Seward Burroughs I was awarded four patents on this date for his “Calculating-machine,” the invention of that led to his company, the Burroughs Adding Machine Company. (A model from the 1890s, above.)
Read More

