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
In 1821, German mathematician Carl Friedrich Gauss invented the heliotrope, a device that utilizes a mirror to reflect sunlight over a distance to mark survey points. Heliotropes were commonly used in surveying until the 1980s when GPS technology replaced long-distance surveying.Full Answer >
Although scissors are popularly thought to have been one of Leonardo da Vinci's inventions, earlier examples of the device have been dated to between 3000 and 4000 years ago. While a single original inventor is not known, the earliest scissors are attributed to people of the Middle East.Full Answer >
Since the 1st century when Romans experimented with magnifying small objects by looking at them through glass, the microscope has changed considerably with modern versions of the device capable of presenting three-dimensional images of objects at the sub-atomic level. The most notable advances in microscope technology occurred in the 19th century.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 >