Some inventions of the Twentieth Century

Spanish Version: Algunos inventos modernos del Siglo XIX

Credit Card Invented in 1950 by Ralph Scheider, a U.S. national, this first card offered the possibility of using it in 27 restaurants in the city of New York. It was used exclusively for members of the Diner's Club.

Gradually its use spread and you could pay in other shops and hotels. Eight years after Bank of America created the first credit card bank.

Tissue paper or Kleenex The idea was to reduce the spread of germs and reduce costs and work with the classic handkerchiefs. They were first marketed in 1924 by Kimberly-Clark Company in the USA.

Automatic Toaster mater The toast was invented in 1927 by a U.S. which included a mechanical system of springs that could be activated by thermal contact, pushing the bread slices in a given time.

Waterproof Watch Rolex brand was who in 1927 created the model "Oyster" (oyster) can withstand immersion under water without affecting the mechanism. In its early days, was widely used by professionals who are pursuing their work in the aquatic environment.

Skateboard Invented in 1968 by Mickey Munoz and Phil Edwards, California surfers, and it is based on the skateboard, surf-Roll was called. He succeeded and expanded its practice since 1973.

Simply folding umbrella, the German Hans Haupt was looking to manufacture a folding umbrella that would allow to be stored in small spaces. He succeeded in 1929.

Parking Meter Carlton C. Magee, President of the curious "Traffic Committee of Business Men" stands, to the difficulties already faced in the decade of the 30s of last century, devised a manual mechanism, powered by springs, which were run on a needle a sphere, indicating the time elapsed since the insertion of the coin. The marketing was carried out by the Dual Parking Meter Co. in 1935.

Electric Guitar The occurrence was to incorporate a guitar into a microphone. It happened in 1931 when Adolph Rickembacker, Barth and Beauchamp plugged the microphone to a speaker.

Sanitize buffer 1930, the American Earl Hass, and to alleviate the discomfort and inconvenience of sanitary towels, invented the tampon. It was so successful that the company he founded, the Tampax Co., earned huge profits just a year after its commissioning.

Teddy Bear. Many historians give to the Teddy Bear invention status. If so, we should rescue the memory of Morris Mitchom that chain and in 1902, manufactured teddy bears in America. In unison, in Germany, Richard Setif, did the same. In the U.S. the bear figuratively reflected the image of President Roosevelt, who was nicknamed "Teddy", whence the nickname "Teddy Bear".

Fluorescent tubes Georges Claude implemented an experiment that has already been tested by other researchers, but with greater success. In the late nineteenth century scientists had conducted experiments with vacuum tubes and fitted with electrodes that added gases, with the aim of generating light.

However, it was Claude who used neon thus achieving the desired effect, produce light radiation through electricity. If the goal was to light the streets through this method, it was not until 1940 when he succeeded.

The lighting system was improved about 1948 when he discovered halophosphate based fluorescent powders of calcium and strontium. In the seventies there was a new innovation with the discovery of green and blue fluorescent powders, based on a combination of magnesium aluminate and yttrium oxide red.

The Blaupunkt car radio's founder, the company that bears his name, built in 1932 a radio that connected the car battery. Aided by an antenna, allowing listening to the radio when the invention had almost from birth.

Gas Chamber The first run through this atrocious system took ten minutes to expire. It was Gee Jon and occurred in 1924. The "invention" was the work of Mayor D. A. Turner of the U.S. Army Medical Corps.

Polaroid invented by Edwin H. Land in 1947, bears the name of the brand that created it. Not too many units were sold at first, perhaps because the pictures they were in black and white. The color came in 1963. The secret is that polaroid camera film contains chemicals sensitive to blue, green and red and revealing the picture. Among these are alkaline and assets based opacifier titanium dioxide to prevent light from leaking.

@Actually_Notes