The doorknob was invented in 1878 by Osbourn Dorsey when he filed a patent for an internal mechanism that latched doors shut. If Dorsey's knob was on the left side of a door, it unlatched a metal bar on the right side of the door.Know More
The metal rod latched into a hole in the door frame. Homeowners accessed the connection in the frame by unscrewing a small metal cover.
Before doorknobs, homeowners secured doors by using a latch string that looped around a bar to keep strangers out. In ancient times, people raised and lowered bars to secure doors so that people could not get inside.Learn more about Inventions
Joel Houghton received a patent for the first dishwasher, which had a wooden hand-operated wheel designed to splash water to clean dishes; however, Josephine Cochrane invented the first workable dishwashing machine, which was mechanical and hand-operated. Introduced at the 1893 World’s Fair, dishwashers did not become popular until the 1950s.Full Answer >
Mary Phelps Jacob, a New York socialite, received a patent for the "Backless Brassiere", the precursor to the modern bra, on Nov. 3, 1914. She created it using two handkerchiefs and a ribbon after buying a sheer evening dress that was unsuitable for wearing with a whalebone corset.Full Answer >
Barbed wire was developed by several people, but the first person to patent it was Joseph Glidden. Inspired by a wire fencing prototype displayed at the 1873 DeKalb County Fair in Illinois, Glidden experimented with different wire twist methods and finally filed his patent on November 24, 1874.Full Answer >
Richard Arkwright and John Kay of Great Britain invented the water frame in the late 1760s, and Arkwright applied for a patent in 1769. The patented spinning machine twisted 96 strands of yarn simultaneously.Full Answer >