Philip B. Downing was the African-American inventor of the public mailbox, a metal box on four legs with an outer door and an inner safety door. He called it a street letter box and intended it to be used instead of the post office.Know More
Downing patented his mailbox on Oct. 27, 1891. Before 1891, safety was not guaranteed in public mailboxes because they were typically left half-open. With Downing's invention, the inner safety door ensured the protection of mail from theft and adverse weather conditions.
In 1890, Downing patented a railway switch controlling the power supply to trains. Residential electrical switches were later invented based on this design.Learn more about Inventions
George T. Sampson was an African-American inventor best known for his early patent of the automatic clothes dryer in 1892. He also invented a sled propeller.Full Answer >
Lewis Howard Latimer was an African-American inventor, engineer and draftsman. In addition to his own inventions, Latimer is perhaps best known for his patent work with Alexander Graham Bell and Thomas Edison. He helped draft the patent for Bell's telephone design and promoted and defended Edison's light bulb design.Full Answer >
According to The Black Inventor Online Museum, Phillip L. Downing invented the mailbox. Prior to Downing's creation of the four-legged metal mailbox, those wanting to mail a letter had to make a long trip to the nearest post office.Full Answer >
The thermostat on a Reliance 501 electric water heater is usually located in a metal box on the side of the tank, while the thermostat on gas water heaters is usually found near the firebox. Some units also have an external thermostat mounted on the wall near the unit.Full Answer >