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Incandescent light bulb
makes light by heating a metal filament wire to a high temperature until it glows. The hot filament is protected from air by a glass bulb that is filled with inert gas or evacuated. In a halogen lamp filament evaporation is prevented by a chemical process that returns metal to the filament. -
Bessemer process
The inventor is Henry Besseme its named after him .was the first inexpensive industrial process for the mass-production of steel from molten pig iron -
Alternating Current
the movement of electric charge periodically reverses direction. In direct current dc, the flow of electric charge is only in one direction.
AC is the form in which electric power is delivered to businesses and residences
the inventor was Nikola Tesla -
Period: to
Inventions Timeline
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Air Brakes
Designed and built for use on railroad train application, air brakes remain the exclusive systems in widespread use It was invented by George Westinghouse. The are know in buses, trucks and semi' trailers. -
Microphone
is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. thge inventor is Emile Berliner. we still use them to this day but we have inproved them to make them eayer to use -
cash register-
is a mechanical or electronic device for calculating and recording sales transactions, and an attached cash drawer for storing cash. The cash register also usually prints a receipt for the customer.. the inventer is james ritty -
Maxim Gun
was the first self-powered machine gun. The gun was used in waorld ware one. It was made by a British inventor Sir Hiram Maxim. This was lter imporved. -
Radio
is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. The Inventor Nikola Tesla. Wstill use the redio to day, its probily one of the most comminily used thing -
Aspirin
often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication. felixs hoffman is the inventor -
Barbwire
is a type of fencing wire constructed with sharp edges or points all over it, It was invented by Lucien B. Smith. Its common to around a fency to keep out animals or to keep anim als in, and there somtimes put out side of perisons.
