The gas mask is a device, when used protects the user from breathing in toxic gases and pollutants. The gas mask was invented by Garrett A. Morgan and patented in 1914, though there were others who had worked on these masks before this invention. Garrett’s gas mask was very much similar to the modern [...]

The concept of Holography was invented by a Hungarian-British scientist and engineer Dennis Gabor in 1947. He was awarded a Nobel Prize in Physics for this work in 1971. Born in Budapest in a Jewish family his name by birth was Gunszberg Denes. After working in the Hungarian army during World War I, he studied [...]

Edwin Ruud, a Norwegian mechanical engineer invented the electric water heater in 1889 that has now become an indispensible part of every household and certain commercial organizations and industries. He founded the Ruud Manufacturing Company where these devices were manufactured and sold. Ruud’s design had a large tank for storing hot water and a heat [...]

The first successful guitar that was electrically amplified was developed by George Delmetia Beauchamp in the year 1931 along with Paul Barth and Adolph Rickenbacker. Beauchamp had also invented other musical instruments and was one of the founders of National Stringed Instrument Corporation and Rickenbacker guitars. Born in Texas, in his earlier years he played [...]

Earphones are an evolved form of headphones that was first invented by Nathaniel Baldwin in his kitchen and was supplied to the US Navy. Nathaniel Baldwin was born on December 1, 1878 in Millard County, Utah. Even when he was a child, he had a technical bend of mind and he went on to pursue [...]

Who invented the DVD?
DVD also known as Digital Video Disk was invented in 1995 and the invention is a group effort of companies the following companies namely; Sony, Philips, Toshiba and Time Warner. Many other company representatives have also contributed in different working groups to this invention.
DVD is the successor of CD (Compact [...]

Christian Andreas Doppler an Austrian physicist and mathematician had proposed the Doppler Effect in 1842. The Doppler Effect is a vital part of the Doppler radar system and thus the system was named after him.
Doppler was born in Salzburg in Austria and studied mathematics and astronomy in Salzburg and Vienna at the age [...]

The concept of a dishwasher was first brought to light by Joel Houghton way back in 1850. This was a machine made of wood which had a wheel that had to be turned manually. This machine had no market except from the big hotels and restaurants. Josephine Cochrane then invented a device in [...]

A hovercraft (air-cushion vehicle, ACV) is a vehicle capable of traversing over surfaces, and is supported by a high-pressure, slow moving air cushion, which gets ejected against the surface lying below.
Though the principles behind hovercrafts and hovering were first mentioned by Emanuel Swedenborg in 1716, Sir Christopher Cockerell, an English electronic engineer was given the [...]

A hairdryer or blow dryer is an electromechanical gadget that blows hot or cool air over damp or wet hair to aid in quick drying of wet hair.
Alexandre Godefoy of France invented the electric hair dryer in 1890. Before the hairdryer was invented men and women used the vacuum cleaner to dry their hair. The [...]

The term fax machine is the short form for facsimile machine. This device can send copies of documents over a telephone line. The first facsimile machine was invented by Alexander Bain, a Scottish inventor in 1846. He was born in Watten in Scotland and has invented many devices that can make practical use of electricity. [...]

The Hubble Space Telescope was developed by the United States Space Agency, NASA with valuable contributions from The European Space Agency. Though the funding was obtained in 1970, it was first launched only in 1990 because of the number of problems and delays that included financing. The space telescope takes its name from Edwin Hubble, [...]

A car engine is usually an internal-combustion engine and there are various types of internal-combustion engines. The various types of internal-combustion engines that power the car are diesel engines and gasoline engines. All types of internal-combustion engine have their advantages and their disadvantages.
The external combustion engine
The old-fashioned steam engines that were used at the [...]

Mariners have always used the position of the latitude and the longitude to seek directions in the sea as well as mark their relative positions in the sea. Historically, they would calculate their position by looking at the North Star Polaris with a sextant when they sailed the waters in the northern hemisphere.
GPS navigational system
Modern [...]

The solar cells can be used as the alternative source of electricity. As all know the fossil fuels and other sources of energy such as coal which we have been utilizing so far for making electricity is decreasing day by day. The solar power can be used to solve this problem. Since the energy provided [...]

MP3 technology has taken the world by storm and has been readily accepted by people. MP3 players have no moving parts and deliver high-quality sounds. They are portable and can be carried by those that love their music on the go. An MP3 player consists of a microprocessor, hard disk for storing memory files, audio [...]

Cochlear implants are used by people who are medically termed as deaf or are extremely hard of hearing. The implant itself has two plants. The first part of the implant is fixed behind the ear, while the second portion of the implant is surgically implanted inside the ear under the skin.
The mechanism of the [...]

With instant cameras, you are able to develop photos the moment you click them. The basic function of the instant cameras is the same as in other cameras. Other than that these cameras have the equipment to develop the photos on plastic sheets of film.
Self developing films
Photos can be developed within seconds if you are [...]

Jet engines propel the aircraft by releasing fast flowing liquid fuels. According to Newton’s third law of motion, “every action has an equal and opposite reaction”, the speed with which the fuel is released by the engines propels the machine in the opposite direction with the same speed and velocity. There are other factors, that [...]

Nowadays, a large number of people are opting for the alternative sources of energy, such as solar energy. Solar energy can be used effectively for operating various electrical and mechanical devices by using solar panels. Solar panels are used for emergency traffic lights, powering heaters and solar cookers and have many other uses as well. [...]