The kinetoscope was invented in the United States in 1891 by Thomas Edison and William Dickson. The kinetoscope consisted of a strip of film that was passed rapidly between a lens and an electric light bulb as the viewer looked through a peephole.
Located behind the kinetoscope peephole was a spinning wheel with a narrow slit that acted as a shutter, which permitted a momentary view of each of the 46 frames that passed in front of the shutter every second. The continuous movement of the frames resulted in a lifelike representation of motion. The kinetoscope was first publicly displayed in 1894. The kinetoscope formed the basis for the first equipment used to project motion picture film.Learn More
The fire extinguisher was invented by George William Manby in 1818. It was a simple device that used a copper cylinder and compressed air to push large amounts of water through the nozzle of the cylinder.Full Answer >
Catapults were long-range weapons designed to help destroy castles in the Middle Ages. They typically consisted of a throwing arm armed with a basket to hold the desired projectile, which would then launch the projectile.Full Answer >
It is not definite as to who invented dominoes, but it is likely that dominoes were invented in China during the 12th century. However, it is possible that they were first invented in Egypt, as there is a set of dominoes that was found in King Tutankhamen's tomb.Full Answer >
Dr. Ian Donald invented the first ultrasound machine in 1957 and tested it on patients a year later. The discovery was made in Glasgow, Scotland, and by the end of the 1950s ultrasounds became routine in Glasgow hospitals.Full Answer >