David Guadalupe Barrientos - 1591630 David García González - 1620213

1. David Guadalupe Barrientos - 1591630David García González - 1620213 American Invetions

2. Electric Light Bulb • Anelectriclampis a devicethat produces light fromelectricity, thisconversionmay be performedbyvariousmethodssuch as joule heating of a metallicfilament, fluorescence of certainmetalstoanelectric shock orothersystems. At presenta it has technologyto produce light withefficiences of 10% to 70%. • Theinvention of thefirstelectricincandescentlampisgenerallyattributedtoThomas Alva Edison presentedtheOctober 21, 1879 a practical and viable lamp, wornfor 48 hoursstraight.

3. Elevator • Theforkliftinspiredthe American Vermont , Elisha G. Otis, toinventanelevatorwith a toothedsystem , whichallowedtocushionitsfallifthe cable iscutlivelihood . Itwasthefirstdemonstration of a securitysystemforpassengerelevators • Thefirstpeopleliftwasinstalled in New York in 1857. AfterElisha 's death in 1861, hissons, Charles and Norton , continueditsactivity in thecompany Otis Brothers & Co. • Otis 's inventionincreasedpublicconfidence in theelevatorswhichwas instrumental in thegrowth of theconstruction of skyscrapers . Theelevatorconstructioncompany he foundedbecameone of thelargestelevatorcompanies in theworld, since 1976 isintegratedintothebusinessconglomeratethatisUnited Technologies Corporation.

4. CellPhone • In the 60s allmajortelecommunicationscompaniesknewthecellular concept ; thequestionwaswhatwouldgettorunthecompany , bothtechnically and economically idea, and whowouldgetthepatentsystemfirst. A yearlater, in 1973 , Martin Cooper and his Motorola teamdemonstratedthefirstworkingprototype of a cellphone "personal" • OnApril 3, 1973 , Martin Cooper of Motorola executivemade ​​thefirstcallfrom a mobilephoneDynaTAC 8000X projectfrom a street in New York , preciselytoitsbiggest rival in thefield of telephony Joel Engel, Bell Labs AT & T

5. Donald William Kerst- Betatrón In 1938 he accepted an offer of an instructorship at the University of Illinois at Urbana Champaign, where the head of the physics department, F. Wheeler Loomis encouraged Kerst in his efforts to create a better particle accelerator. The result of these efforts was the betatron. the Betatrons were historically used in particle physics experiments to provide beams of high-energy electrons-above 300 MeV. If the electron beam is directed to a metal sheet, the betatron can be used as a source of x-rays or gamma rays; these x-rays can be used for industrial and medical applications Donald William Kerst was an American physicist who worked on advanced particle accelerator concepts and plasma physics. He is most notable for his development of the betatron, a novel type of particle accelerator used to accelerate electrons.

6. Spencer FergusonSilver - Post-it notes • Spencer Ferguson Silver is an American chemist who, together with Arthur Fry, invent Post-it notes In 1968, Silver developed a high-quality but "low-tack" adhesive,made of tiny, indestructible acrylic spheres that would stick only where they were tangent to a given surface, rather than flat up against it. Spencer used the patented formula from Shiro Takemoto. As a result, the adhesive's grip was strong enough to hold papers together, but weak enough to allow the papers to be pulled apart again without being torn. More importantly, the adhesive could be used again and again.

7. Charles ‘Chuck’ Hull - 3D Printing • Chuck Hull is the co-founder, executive vice president and chief technology officer of 3D Systems. He is the inventor of the solid imaging process known as stereolithography (3D Printing), the first commercial rapid prototyping technology, and the STL file format. He is named on more than 60 U.S. patents as well as other patents around the world in the fields of ion optics and rapid prototyping. He was inducted into the National Inventors Hall of Fame in 2014 • In Hull’s patent, a concentrated beam of ultraviolet light is focused onto the surface of a vat filled with liquid photopolymer. The light beam, moving under computer control, draws each layer of the object onto the surface of the liquid. Wherever the beam strikes the surface, the photopolymer polymerizes/crosslinks and changes to a solid. An advanced CAD/CAM/CAE software mathematically slices the computer model of the object into a large number of thin layers. The process then builds the object layer by layer starting with the bottom layer, on an elevator that is lowered slightly after solidification of each layer