Witryna12 lut 2013 · Study now. See answer (1) Best Answer. Copy. Texas. Wiki User. ∙ 2013-02-12 20:35:00. This answer is: Study guides. WitrynaHere's a link to Osbourn Dorsey's patent. He has clearly invented a device for holding doors open, a sort of bar that attaches to a doorknob's spindle. ... In the lower photo, types section, there are two arrowed Escutcheon plates, in the text, "The plate on the front edge of the lock where the latch bolt protrudes is called the faceplate."
¿Cuándo nació Osbourn Dorsey? - 411answers.com
WitrynaDorsey Parent Name Meaning. Historically, surnames evolved as a way to sort people into groups - by occupation, place of origin, clan affiliation, patronage, parentage, adoption, and even physical characteristics (like red hair). Many of the modern surnames in the dictionary can be traced back to Britain and Ireland. WitrynaWho was Osbourn Dorsey? Osbourn Dorsey, Inventor. In 1878, at approximately 16 years of age, Osbourn invented the doorknob and the doorstop. On December 10, 1878, he received his first U.S. patent # 210,764 for the first documented invention of the doorknob and door stop (also known as a door stopper). shvrl-3a-901rsi
Osbourn Dorsey, the 16-year-old African American who invented …
Witryna11 gru 2005 · posted by fire&wings at 12:37 PM on December 11, 2005. He didn't invent it, but he was granted a patent for improving the doorknob. Googling for "Osbourn Dorsey" should give you some more resources. posted by Gator at 12:48 PM on December 11, 2005. Well, yes, the modern doorknob, of course. Osbourn is his first … WitrynaOsbourn Dorsey (birth date estimated to be September 19, 1862 – September 15, 1913) was a freed slave who invented the doorknob and doorstop in December of 1878. … WitrynaOsbourn Dorsey was probably born in September 1861. His mother’s name was Christina Dorsey and he had two older siblings, Mary and Levi. We know this from the Washington DC slave emancipation records from April 1862, where he is listed as “Osbourn Dorsey- son of the above named Christina- Aged about eight months- … shvschool