In the 1430s, Johann Gutenberg invented a device to allow those in the back of a crowd to see over other people. The first naval periscope was invented in 1854 by Hippolyte Marie-Davy.Know More
During World War I, some rifles had a periscope attached to allow soldiers to view the area outside the trench. Periscopes are also used in armored vehicles to allow the personnel in the vehicle to remain under cover while viewing the situation in the surrounding area. Rudolph Gundlach patented a rotary periscope for use in tanks in 1936.
The word periscope is derived from the Greek words, peri and scopus, meaning "around" and "to look."Learn more about Inventions
The Slinky's inventor, Richard James, was initially working on a device that would keep equipment steady on ships when he discovered the coil's unusual movements. James's creation is an example of an "accidental" invention borne our of a completely different intent.Full Answer >
Although it is unknown precisely who invented the abacus, the device was developed in China around 3000 B.C. It is highly compact and easy to use and forms the basis for modern calculators and computers.Full Answer >
The United States Patent Office issued patent #174,465 to Alexander Graham Bell on March 7, 1876, for his device that could transmit speech electrically: the telephone. On March 10, Mr. Bell spoke the first intelligible words into the device: "Mr. Watson, come here, I want to see you."Full Answer >
The electric drip coffee maker was invented in 1954 by the German inventor Gottlob Widmann, and the device was called the Wigomat. Electric coffee makers did not become popular in the United States until the 1970s.Full Answer >